Hurley Climatological Summary

Hurley is located about 3 km north west of Maidenhead, Berkshire.

Average monthly temperatures (degC)

-------------------------------------------------------

      Mean  Mean  Mean  Highest Lowest  Highest Lowest
      Max   Min         Monthly Monthly Monthly Monthly
                        Max     Max     Min     Min
-------------------------------------------------------
Jan |  6.7   0.7   3.7  11.6     0.5     7.4    -7.0
Feb |  7.1   0.8   3.9  12.1     2.2     6.7    -5.1
Mar |  9.8   2.0   5.9  15.8     4.2     7.9    -4.1
Apr | 12.6   3.7   8.1  19.3     6.6     9.5    -2.2
May | 16.3   6.5  11.4  23.7    10.7    11.6     0.1
Jun | 19.5   9.5  14.5  25.9    13.8    14.6     3.7
Jul | 21.6  11.5  16.6  28.2    16.6    16.4     6.2
Aug | 21.2  11.3  16.2  27.2    16.2    15.9     5.4
Sep | 18.6   9.2  13.9  24.0    13.5    14.9     3.0
Oct | 14.7   6.7  10.7  20.2     9.6    13.3    -0.4
Nov |  9.9   3.2   6.5  15.3     3.9    10.6    -3.7
Dec |  7.5   1.6   4.6  12.9     1.5     9.0    -5.9
Year| 13.8   5.6   9.7  29.2    -0.7    16.7    -9.1

Extreme Monthly Temperatures (degC)

---------------------------------------------------------------------
      ----Mean Maximum-----  ----Mean Minimum---  -Warmest- -Coldest-
      High Year  Low  Year  High Year  Low  Year    Month     Month 
                                                       Year      Year
---------------------------------------------------------------------
Jan |  9.8 1975   0.4 1963   4.1 1975  -4.9 1963   6.9 1975 -2.3 1963
Feb | 10.9 1990   1.4 1986   4.6 1961  -4.3 1956   7.6 1990 -1.1 1986
Mar | 13.7 1957   7.1 1955   6.0 1981  -1.4 1962   9.3 1957  2.9 1962
Apr | 15.1 1987  10.0 1986   6.1 1961   1.6 1956  10.3 61,87 6.2 1986
May | 19.8 1989  14.3 75,84  8.7 1964   5.4 57,84 13.8 1964  9.9 1984
Jun | 24.3 1976  16.3 1977  11.4 1982   7.7 1972  17.8 1976 12.1 1972
Jul | 26.6 1983  18.2 1954  14.1 1983  10.1 1963  20.3 1983 14.5 1954
Aug | 24.9 1990  18.2 1956  12.9 1975   9.8 1956  18.8 1990 14.0 1956
Sep | 22.1 1959  16.4 1974  11.2 1956   6.3 1986  15.7 1961 11.5 1986
Oct | 17.4 1969  10.6 1974   9.7 1968   4.0 1964  12.9 1968  7.5 1974
Nov | 11.8 1978   7.4 1985   5.6 82,84  0.9 85,88  8.5 1984  4.1 1985
Dec | 10.6 1974   3.7 1981   5.5 1974  -2.4 1981   8.1 1974  0.7 1981
Year| 15.4 59,89 12.5 1963   6.4 1990   4.5 1962  10.9 89,90 8.5 1963
    |      90

Extreme Monthly Temperatures (degC)

---------------------------------------------------------------------------------------------
      -Highest Maximum----  --Lowest Maximum----  -Highest Minimum----  --Lowest Minimum----
      High Year  Low  Year  High Year  Low  Year  High Year  Low  Year  High Year  Low  Year
---------------------------------------------------------------------------------------------
Jan | 14.1 1975   5.0 1963   5.2 1975  -6.1 1987  11.1 1957   1.1 1963  -2.2 1975  -15.0 1963
Feb | 17.2 1959   4.1 1986   6.7 1961  -3.5 1991  10.6 1958   0.6 1963  -0.6 61,66 -11.6 1986
Mar | 22.2 1965  12.3 1987  10.0 1957  -0.1 1986  11.2 1990   5.6 1969   0.0 1981   -9.4 1965
Apr | 22.8 58,87 14.6 1989  10.6 55,60  1.1 1966  12.4 1971   6.7 1953   1.7 1961   -4.9 1990
May | 29.4 1953  18.3 1962  13.4 1989   7.0 1979  13.9 1953   8.8 1984   2.9 1978   -3.3 1967
Jun | 33.7 1976  18.9 1972  17.2 1966  10.6 1953  18.8 1976  12.2 1972   6.7 1970   -0.6 1962
Jul | 33.4 1976  22.2 1965  20.6 1983  13.9 1954  18.0 1989  15.0 54,55  8.7 1991    3.3 1965
    |                                                             58,62
    |                                                             65,66
Aug | 35.6 1990  21.1 1956  18.9 1959  13.3 1954  19.0 1975  13.9 1960   8.2 1973    2.6 1979
Sep | 29.0 1973  20.0 1965  18.3 1959  10.3 1986  16.7 1958  11.6 1972   7.2 1956   -0.6 1969
Oct | 26.1 1959  13.5 1974  12.8 1989   5.8 1974  15.7 1981   9.1 1974   3.3 1968   -4.0 1983
Nov | 17.8 1969  12.4 1976   7.2 53,61  1.1 66,69 13.4 1981   7.2 1961  -0.5 1986   -7.4 1983
    |                            63
Dec | 15.7 1985   8.9 1976   5.6 1953  -3.0 1978  12.6 1985   4.9 1976  -0.3 1988  -17.3 1981
Year| 35.6 1990  24.8 1974   2.6 1974  -6.1 1987  19.0 1975  15.0 54,62 -4.9 1990  -17.3 1981
    |                                                             65

Average Daily Maximum Temperature Distribution (degC)

------------------------------------------------------------------
      -----No. of days with a maximum temperature in the range----
      -10.0  -5.0   0.0    5.0    10.0   15.0   20.0   25.0   30.0
      to     to     to     to     to     to     to     to     or
      -5.1   -0.1   4.9    9.9    14.9   19.9   24.9   29.9   more
------------------------------------------------------------------
Jan |  0.1    1.2    8.5   14.4    6.8    0      0      0      0
Feb |  0      0.5    7.5   13.1    6.8    0.1    0      0      0
Mar |  0      0      2.3   12.9   13.9    1.7    0.2    0      0
Apr |  0      0      0.2    6.4   15.9    6.5    1.0    0      0
May |  0      0      0      0.5   11.0   14.5    4.3    0.7    0
Jun |  0      0      0      0      2.6   14.9    9.7    2.6    0.2
Jul |  0      0      0      0      0.2   10.6   14.6    4.8    0.8
Aug |  0      0      0      0      0.2   11.8   14.6    4.2    0.2
Sep |  0      0      0      0      2.8   17.4    9.2    0.6    0
Oct |  0      0      0      1.7   15.1   13.0    1.1    0.1    0
Nov |  0      0      2.2   12.7   13.6    1.5    0      0      0
Dec |  0      0.4    7.1   14.1    9.3    0.1    0      0      0
Year|  0.1    2.1   27.8   75.8   98.2   92.1   54.7   13.0    1.2

Average Daily Minimum Temperature Distribution (degC)

----------------------------------------------------
     No. of days with minimum temperature in range--
     less  -10.0  -5.0   0.0    5.0    10.0   15.0
     than   to     to     to     to     to     to
     -10.0  -5.1   -0.1   4.9    9.9    14.9   19.9
----------------------------------------------------
Jan | 0.4    2.1   10.1   13.2    5.1    0.1    0
Feb | 0.1    1.4    9.9   13.0    3.6    0      0
Mar | 0      0.6    7.8   16.1    6.2    0.3    0
Apr | 0      0      4.3   14.4   10.6    0.7    0
May | 0      0      0.6    7.6   19.0    3.8    0
Jun | 0      0      0      2.3   13.1   13.9    0.7
Jul | 0      0      0      0.2    8.7   18.4    3.7
Aug | 0      0      0      0.5    9.3   18.2    3.0
Sep | 0      0      0      3.4   12.8   12.7    1.1
Oct | 0      0      1.5    8.6   14.1    6.7    0.1
Nov | 0      0.4    6.6   13.0    8.3    1.7    0
Dec | 0.1    1.8    8.8   13.3    6.2    0.8    0
Year| 0.6    7.3   49.6  105.6  116.0   77.3    8.6

Grass Minimum Temperatures (degC)

-----------------------------------------------------------------------------
      -----------Monthly mean------------ -----------Monthly minimum---------
      Average  --Highest--  ---Lowest---- Average  --Highest--  ---Lowest----
                     Year          Year                  Year          Year
-----------------------------------------------------------------------------
Jan | -1.4      1.5  1975    -5.5  1963   -9.4     -4.4  1968   -18.8  1982
Feb | -1.5      2.5  1961    -5.7  1986   -8.2     -1.7  1966   -14.4  1986
Mar | -0.4      4.1  1981    -3.7  1955   -7.5     -3.1  1981   -11.1  1953
Apr |  1.2      3.9  1966    -1.6  1954   -5.4     -1.7  61,66   -8.9  68,84
May |  3.9      7.2  1964     0.6  1990   -2.9      1.7  1969    -7.3  1990  
Jun |  7.3     10.0  1960     4.2  1975    0.8      4.4  1963    -3.2  1991
Jul |  9.2     12.2  1983     7.1  1970    2.6      6.7  57,60   -1.1  1970  
Aug |  8.9     11.3  1969     6.2  1976    2.3      6.7  1969    -0.5  1974  
Sep |  6.8     10.0  1961     3.2  1986    0.0      4.4  1956    -3.3  1957  
Oct |  4.2      7.7  1968     1.5  1974   -3.2      0.6  58,63   -8.4  1983  
    |                                                    68
Nov |  0.8      3.2  53,63   -1.6  1988   -6.9     -2.2  1958   -11.1  1983  
    |                82
Dec | -0.8      3.2  1974    -4.8  1981   -8.9     -2.9  1988   -20.2  1981  
Year|  3.2      4.4  1960     2.4  1980  -11.4     -7.2  1960   -20.2  1981  

Average Daily Grass Minimum Temperature Distribution (degC)

------------------------------------------------------------
      No. of days with grass minimum temperature in range---
       less   -15.0  -10.0  -5.0   0.0    5.0    10.0   15.0
       than   to     to     to     to     to     to     to
       -15.0  -10.1  -5.1   -0.1   4.9    9.9    14.9   19.9
------------------------------------------------------------
Jan |   0.1    0.8    5.2   13.0    9.5    2.4    0      0
Feb |   0      0.8    4.5   12.5    8.5    1.7    0      0
Mar |   0      0      4.0   12.2   11.9    2.8    0.1    0
Apr |   0      0      1.5    9.7   13.4    5.2    0.2    0
May |   0      0      0.3    4.9   12.7   11.0    2.1    0
Jun |   0      0      0      1.0    6.5   14.1    8.2    0.2
Jul |   0      0      0      0.1    3.5   13.4   12.9    1.1
Aug |   0      0      0      0      4.4   12.9   12.8    0.9
Sep |   0      0      0      1.5    9.4   11.3    7.5    0.3
Oct |   0      0      0.2    5.7   10.6   11.3    3.2    0
Nov |   0      0      3.1   10.7   10.4    5.0    0.8    0
Dec |   0      0.5    5.0   12.2    9.4    3.7    0.2    0
Year|   0.1    2.1   23.8   83.5  110.2   94.8   48.0    2.5

Rainfall Averages

-------------------------------------------------------
      Mean Mean Max  Average number of days with a fall
      Fall    Daily  0.2   1.0   5.0   10.0  15.0  20.0
              Fall   mm    mm    to    to    to    mm 
                     or    or    9.9   14.9  19.9  or  
       mm      mm    more  more  mm    mm    mm    over
-------------------------------------------------------
Jan |  60.4    11.8  17.2  11.9   3.8   0.8   0.3   0
Feb |  41.4     9.9  12.6   8.4   2.3   0.4   0.2   0
Mar |  53.1    11.8  15.3  10.6   2.9   0.6   0.3   0.1
Apr |  47.1    11.0  14.1  10.1   2.7   0.5   0.2   0
May |  53.3    13.7  13.7  10.3   2.3   0.6   0.3   0.3
Jun |  57.2    19.4  11.5   8.2   2.0   0.6   0.4   0.6
Jul |  47.1    18.7  10.9   7.6   1.8   0.4   0.2   0.4
Aug |  63.6    23.5  12.4   8.6   1.7   0.7   0.4   0.7
Sep |  58.5    18.2  11.5   8.7   2.1   0.8   0.4   0.5
Oct |  59.8    15.5  14.3  10.0   2.0   1.0   0.4   0.4
Nov |  62.4    15.4  15.0  10.6   2.8   1.0   0.4   0.3
Dec |  68.2    16.2  16.2  11.2   3.5   0.9   0.5   0.3
Year| 672.1    36.5 164.7 116.2  29.9   8.3   4.0   3.6

Rainfall Extremes

-------------------------------------------------------------
     Wettest Month   Driest Month-  Wettest 24 hrs in a month
        mm    Year      mm    Year  -Greatest--    ---Least--
                                     mm   Year     mm   Year
-------------------------------------------------------------
Jan |  130.4  1988       9.2  1987   23.3 1958      3.7 1992
Feb |  101.6  1977       1.5  1959   19.1 1958      0.8 1959
Mar |  125.5  1981       4.8  1961   36.1 1964      1.8 1966
Apr |  102.1  1966       1.7  1984   32.1 1991      0.6 1984
May |  131.4  1979       2.2  1990   30.8 1985      1.5 1990
Jun |  137.9  1971       2.8  1962   39.5 1971      0.8 1962
Jul |   98.1  1988       4.6  1955   48.3 1962      3.1 1984
Aug |  171.0  1977       5.3  1983   74.0 1977      3.8 1983
Sep |  162.1  1974       5.6  1969   46.2 1968      2.0 1969
Oct |  183.4  1960       3.6  1978   39.8 1987      1.0 1978
Nov |  164.8  1970      13.5  1956   31.0 1987      3.6 1956
Dec |  165.6  1989       7.6  1953   43.1 1989      3.0 1953
Year|  888.1  1960     468.6  1990   74.0 1977     15.5 1990

Rainfall Extremes

------------------------------------------------------------------------
     ---no. of days with--  ---no. of days with--  ---no. of days with--
     ----0.2mm or more----  ----1.0mm or more----  ----5.0mm or more----
     Most Year Least Year   Most Year Least Year   Most Year Least Year
------------------------------------------------------------------------
Jan | 27  1970    7  1992    19  1975    2  53,87   12  1988    0  73,92
Feb | 22  1977    2  56,59   18  1977    0  1959     8  1990    0  56,59,
    |                                                              62,65
Mar | 27  1981    3  56,61   22  1981    3  56,61   12  1981    0  var
    |                                       90
Apr | 24  1970    4  54,82   18  66,83   0  1984     7  64,66   0  var
    |                                                   83
May | 25  1972    2  1956    19  1981    1  56,90   10  1981    0  56,74
    |                                                              90,91
Jun | 21  82,85   3  1976    16  1985    0  1962     9  1985    0  62,75
    |     91
Jul | 21  1988    2  1955    16  1957    1  1955     8  57,88   0  55,84
    |                                                              90
Aug | 21  1956    2  1976    19  1956    1  1983    10  1956    0  1983
Sep | 22  68,74   3  1959    18  1974    3  59,69    9  1974    0  69,71
    |                                       72,85
Oct | 24  76,81   5  1985    22  1960    1  1978    12  1960    0  75,78
Nov | 26  1960    6  1955    24  1960    4  1978    12  1954    0  1956
Dec | 23  59,69   7  1988    21  1959    1  1953    14  1978    0  1953
    |     78,84
Year|211  1960  125  1955   161  1960   89  1953    66  1958   32  1953

30cm Earth Temperatures at 0900GMT (degC)

----------------------------------------------------------------------
     ---Monthly mean temperatures-------   -Extremes of 0900GMT value-
     Average  -Warmest--     -Coldest---   -----Maximum   -----Minimum
                     Year          Year    deg C  Year    deg C  Year
----------------------------------------------------------------------
Jan |  4.1      6.6  1975     0.1  1963      9.5  1957     -1.6  1963 
Feb |  4.1      6.5  61,90    0.1  1963      9.5  1958     -0.4  1963 
Mar |  5.5      8.1  1957     3.0  1955     10.6  1957     -0.2  1963 
Apr |  8.3     10.7  1961     6.6  1986     13.7  1987      4.0  1964 
May | 12.1     14.2  1989    11.0  62,75    17.8  1964      7.1  1979 
Jun | 15.7     18.2  1960    13.4  1972     22.1  1976     11.0  1975 
Jul | 17.6     20.5  1976    15.8  54,80    23.3  1959     13.9  1954 
Aug | 17.2     19.8  1990    15.3  1956     22.3  1990     13.5  1956 
Sep | 14.9     16.7  1959    12.7  1986     20.1  1955     10.8  1986 
Oct | 11.6     13.6  1968     9.2  1974     15.9  83,85     6.7  56,59
Nov |  7.7      9.5  1978     6.0  1985     13.1  1967      2.9  1989
Dec |  5.2      8.3  1953     3.0  1962     10.1  1953      0.6  var  
Year| 10.4     11.5  1989     9.1  1963     23.3  1959     -1.6  1963 

Average 09GMT 30cm Earth Temperature Daily Distribution (degC)

--------------------------------------------
     -No. of days in certain ranges of the--
     --------09GMT 30cm Earth Temperature---
            0.0    5.0    10.0   15.0       
     below  to     to     to     to     over
     0.0    4.9    9.9    14.9   19.9   19.9
--------------------------------------------
Jan | 0.4   18.6   12.0    0      0      0
Feb | 0.2   17.7   10.1    0      0      0
Mar | 0     10.3   20.7    0      0      0
Apr | 0      0.8   24.4    4.8    0      0
May | 0      0      2.7   26.8    1.5    0
Jun | 0      0      0     10.3   19.4    0.3
Jul | 0      0      0      0.9   27.6    2.5
Aug | 0      0      0      0.9   28.8    1.3
Sep | 0      0      0     15.1   14.9    0
Oct | 0      0      6.5   24.1    0.4    0
Nov | 0      2.8   23.1    4.1    0      0
Dec | 0     13.8   17.2    0      0      0
Year| 0.6   64.0  116.7   87.0   92.6    4.1

Soil Temperatures at 0900GMT (degC)(some data missing, see below)

------------------------------------------------------------------------------
     Monthly mean 10cm temperatures ----   Monthly mean 20cm temperatures ----
     Average  -Warmest---    -Coldest---   Average  -Warmest--     -Coldest---
                     Year          Year                    Year          Year
------------------------------------------------------------------------------
Jan |  3.1      5.9  1975    -1.4  1963      3.5      5.0  1976     2.0  1959
Feb |  3.1      5.8  1961    -0.8  1963      3.6      6.0  1961     0.0  1956
Mar |  4.6      7.6  1957     1.8  1955      4.6      7.5  1957     2.3  1955
Apr |  7.6     10.2  1961     5.8  1986      7.3      9.8  1961     6.3  56,78
May | 12.3     15.3  1989    10.8  55,62    11.5     13.2  1960    10.2  1955
    |                              63
Jun | 16.1     18.8  1970    13.4  1972     15.2     17.8  1960    12.7  1972
Jul | 18.0     22.4  1983    15.4  1988     17.1     19.7  1976    15.1  1954
Aug | 16.7     19.4  1983    14.3  1956     16.2     19.0  1955    14.3  1956
Sep | 13.7     15.3  1961    11.0  1986     13.7     15.4  1961    12.2  1974
Oct |  9.8     12.1  1969     6.7  1974     10.4     12.5  1968     7.5  1974
Nov |  5.8      7.5  78,84    3.9  65,85     6.4      8.3  1978     4.8  1965
Dec |  3.9      6.8  1953     1.4  62,76     4.1      7.3  1953     1.9  1962
Year|  9.6     10.7  1989     8.2  1963      9.5     10.2  1961     8.7  1962
10cm data not available for Dec 1967-Oct 1968, Feb-Apr 1969, Jan 1977, Jan-Mar 1979, Jan-May 1987.

20cm data not available for Sep 1959, Jan-Aug 1963, May 1967, Jun-Jul 1968, May 1971, Jan 1975, Jan- Feb 1977, and 1979 onwards.

Number of days with certain types of weather

-----------------------------------------------------------------------------------------
      -Snow falling-   --Snow lying--  Hail/Ice Pellets  ------Hail-----  -Ice Pellets--
      Mean  Highest-   Mean  Highest-  Mean  Highest---  Mean  Highest--  Mean  Highest-
                Year             Year            Year              Year             Year
-----------------------------------------------------------------------------------------
Jan |  3.8  15  1985    3.5  31  1963   0.3   2  var      0.1   2  88,91   0.2   2  1977
Feb |  3.5  16  1963    2.2  15  1963   0.3   2  65,76    0.1   1  61,70   0.2   2  65,76
    |                                                              84
Mar |  2.7   9  1987    0.9   6  1965   1.0   4  1982     0.6   4  82,86   0.4   2  1967
Apr |  1.1   5  1970    0.1   2  1966   0.9   6  1965     0.7   4  1965    0.2   2  65,75
    |                                                                               91
May |  0.1   2  1955    0     0         0.5   3  1982     0.4   3  1982    0.1   1  62,74
    |                                                                               79
Jun |  0     0          0     0         0.1   1  59,68    0.1   1  68,80   0     1  1974
    |                                            74,80
Jul |  0     0          0     0         0.1   2  1971     0.1   2  1971    0     1  1982
Aug |  0     0          0     0         0.1   2  1963     0     1  1963    0.1   1  1963
Sep |  0     0          0     0         0.1   1  55,74    0.1   1  74,84   0     0
    |                                            84,90             90
Oct |  0     0          0     0         0.1   1  81,84    0     1  1986    0.1   1  81,84
    |                                            86
Nov |  0.7   4  1965    0.1   1  69,71  0.1   1  var      0.1   1  74,87   0     1  66,73
Dec |  2.0   7  1981    1.5  14  1981   0.3   3  1969     0.1   1  73,74   0.2   3  1969
    |                                                              90
Year| 13.9  31  1979    8.3  46  1963   3.9  10  1965     2.4   8  1986    1.5   4  65,76
    |                                                                               81
Least days in a
Year|        2  1989          0  72,73        0  1972           0  var           0  var
    |                            88
Snow lying: defined as a ground cover of 50 per cent or more at 0900GMT

Hail only: no data for 1953-1959; defined as hail of diameter 5mm or more

Ice pellets only: no data for 1953-59; includes snow pellets and hail of diameter less than 5mm

Number of days with certain types of weather

------------------------------------------------------
      ----Thunder---   Fog at 09h GMT  -----Gale------
      Mean  Highest-   Mean  Highest-  Mean  Highest--
                Year             Year            Year
------------------------------------------------------
Jan |  0.2   2  1974    3.8  11  1973   0.7   3  1961
Feb |  0.2   2  1966    3.2  14  1975   0.4   3  1967
Mar |  0.4   2  63,82   1.9  18  1956   0.4   4  1982
    |           86
Apr |  0.6   3  65,68   0.7   4  1987   0.1   1  57,60
    |           91                               62,86
May |  1.8   8  1954    0.2   3  1969   0     2  1957
Jun |  2.1   7  57,63   0.1   1  80,82  0     0
    |           82
Jul |  2.0   6  1960    0.1   1  var    0     1  56,61
Aug |  1.5   5  1960    0.5   2  var    0     1  57,61
Sep |  0.8   3  55,58   1.6  11  1969   0.3   2  1983
    |           76,84
Oct |  0.3   2  1958    4.4  13  1953   0.3   4  1959
Nov |  0.1   2  1955    3.2   9  53,87  0.2   2  1977
Dec |  0.2   2  1989    3.7  12  53,72  0.2   1  var
Year| 10.2  23  1982   23.4  61  1956   2.6  11  1961
Least days in a
Year|        5  53,72         1  1967         0  var
    |           78
Fog at 09GMT: defined as visibility below 1000 metres.

Gale: a wind speed averaging 34 knots for at least 10 minutes.

Frost

--------------------------------------------------------------------
     -----------Air frost----------   --------Ground frost----------
      Mean    Most days   Least days  Mean    Most days   Least days
      no      in a month  in a month  no      in a month  in a month
      of          Year        Year    of           Year       Year  
      days                            days                          
--------------------------------------------------------------------
Jan | 12.8    29  1963     3  1974     19.4    30  63,85  12  75,83
Feb | 11.6    26  1963     1  61,90    18.2    27  1963    7  1961
Mar |  8.5    23  1955     0  1981     16.4    25  1973    6  1981
Apr |  4.4    12  1956     0  61,87    11.3    23  1954    4  63,66
May |  0.7     4  1979     0  var       5.3    15  1980    0  69,70
    |                                                         83
Jun |  0       1  1962     0  var       1.0     7  1977    0  var
Jul |  0       0           0            0.1     1  70,90   0  var
Aug |  0       0           0            0       1  1974    0  var
Sep |  0       1  1969     0  var       1.5     9  1986    0  var
Oct |  1.5     5  83,88    0  var       5.8    12  1980    0  58,63
    |                                                         68
Nov |  7.2    16  1988     1  1986     13.8    22  1988    6  1953
Dec | 10.8    21  61,62    1  1977     17.8    26  1962    8  1971
Year| 57.5    89  1955    28  1974    110.6   148  1980   89  1966

Winter data

Days with snow falling                       - most:        36 (1962/3)
                                               least:       2 (1989/90)
Date of first winter snow                    - earliest:    5 Nov (1980)
                                               average:     15 Dec
                                               latest:      13 Feb (1972)
Date of last winter snow                     - earliest:    12 Jan (1959)
                                               average:     5 Apr
                                               latest:      17 May (1955)
Mornings (09GMT) with 50 per cent snow cover - most:        51 (1962/3)
                                               least:       0 (var)
Days with air frost                          - most:        95 (1962/3)
                                               least:       30 (1974/5)
Date of first winter air frost               - earliest:    30 Sep (1969)
                                               average:     26 Oct
                                               latest:      26 Nov (1978)
Date of last winter air frost                - earliest:    22 Mar (1987)
                                               average:     1 May
                                               latest:      1 Jun (1962)
Days with ground frost                       - most:        144 (1979/80)
                                               least:       87 (1966/7)
Date of first winter ground frost            - earliest:    28 Aug (1974)
                                               average:     2 Oct
                                               latest:      9 Nov (1963)
Date of last winter ground frost             - earliest:    16 Apr (1986)
                                               average:     26 May
                                               latest:      22 Jul (1970)

Sunshine Averages

----------------------------------------------------------------
      Monthly  Mean     --Average number of days with sunshine--
       mean    maximum         (hours) in the range         
       sun     duration 0     0.1   3.1   6.1   9.1   12.1  15.1 
      hr/day     hrs          to    to    to    to    to    or   
                              3.0   6.0   9.0   12.0  15.0  more 
----------------------------------------------------------------
Jan |  1.47      6.1   14.3   9.7   6.2   0.8   0     0     0
Feb |  2.31      8.0    9.2   9.4   5.5   3.8   0.1   0     0
Mar |  3.41      9.5    6.3  10.1   6.7   6.2   1.7   0     0
Apr |  4.71     11.9    3.4   8.9   6.4   6.2   4.0   1.1   0
May |  6.04     13.3    2.3   7.3   6.5   6.4   4.7   3.7   0.1
Jun |  6.39     14.0    2.1   7.2   5.4   5.8   5.1   4.2   0.2
Jul |  6.18     13.8    1.7   7.0   7.6   5.9   5.1   3.5   0.2
Aug |  5.79     12.4    2.2   7.1   7.6   6.1   6.5   1.5   0
Sep |  4.57     10.4    3.0   8.8   7.0   7.6   3.6   0     0
Oct |  3.17      8.8    6.7   9.9   7.4   6.5   0.5   0     0
Nov |  2.03      6.9   10.3  10.2   6.5   3.0   0     0     0
Dec |  1.25      5.4   15.5   9.5   6.0   0     0     0     0
Year|  3.95     14.8   77.0 105.1  78.8  58.3  31.3  14.0   0.5

Sunshine extremes

-----------------------------------------------------------------------------------------------
      Sunniest    Dullest    --Greatest total in--  No. of sunless days-   --No. of days with--
        month       month            24 hours                               12hrs sunshine
       hr/day      hr/day    -Highest-  --Lowest-   -Highest-  --Lowest-   -Highest-  --Lowest-
           Year        Year   hrs Year   hrs Year   days Year  days Year   days Year  days Year
-----------------------------------------------------------------------------------------------
Jan | 2.54 1984   0.88 1964   7.6 1974   4.5 1981    22  1970    7  1984     0          0
Feb | 4.00 1970*  0.98 1972   9.3 1956   6.6 1972    17  1972    3  70,88    0          0
    |                                                               89
Mar | 5.39 1967   1.69 1984  11.1 1991   7.8 1984    16  1969    1  55,61    0          0
Apr | 7.59 1984   2.80 1961  13.4 1972  10.2 64,65   11  1966    0  76,82    7  1984    0  var
    |                                                               90
May | 9.69 1989   3.56 1981  15.7 1985   9.3 1983     7  1984    0  var     11  1990    0  var
Jun | 9.37 1975   4.21 1958  16.0 1976   8.3 1980     9  1977    0  var     13  1975    0  var
Jul | 8.85 1976   4.15 1965  15.3 85,89 10.8 60,62    6  1978    0  var     12  1990    0  var
Aug | 8.64 1976   3.07 1958  14.1 1981   9.8 1954     7  68,77   0  var      6  1976    0  var
Sep | 7.21 1959   3.06 1957  12.2 1982   7.6 1975     7  1969    0  var      1  1982    0  var
Oct | 4.46 1959   1.61 1976  10.6 1972   7.2 1968    14  1973    2  1975     0          0
Nov | 2.97 1989   0.93 1962   8.4 1953   4.9 1974    18  1962    4  1977     0          0
Dec | 1.78 1976   0.27 1956   6.5 1976   3.2 1956    24  1956    9  67,70    0          0
Year| 4.89 1990   3.19 1958  16.0 1976  12.8 1958    96  1969   56  1990    31  1990    4  1954
* Sunshine totals: 112.0hrs - Feb 1970, 112.5 hrs - Feb 1988

Number of days with extreme temperatures

--------------------------------------------------------------------------------------------
      ---Max temp below---  ---Max temp above---  ---Min temp below---  ---Min temp above---
             0 degC               24.9 degC              -5 degC              14.9 degC
      -Highest-  --Lowest-  -Highest-  --Lowest-  -Highest-  --Lowest-  -Highest-  --Lowest-
      days Year  days Year  days Year  days Year  days Year  days Year  days Year  days Year
--------------------------------------------------------------------------------------------
Jan |  11  1963    0  var     0          0         13  1963    0  var     0          0
Feb |  11  1956    0  var     0          0         19  1956    0  var     0          0
Mar |   1  1986    0  var     0          0          5  1958    0  var     0          0
Apr |   0          0          0          0          0          0          0          0
May |   0          0          4  89,90   0  var     0          0          0          0
Jun |   0          0         15  1976    0  var     0          0          4  1976    0  var
Jul |   0          0         22  1983    0  var     0          0         17  1983    1  var
Aug |   0          0         17  1990    0  var     0          0          8  59,82   0  var
Sep |   0          0          7  1959    0  var     0          0          4  1989    0  var
Oct |   0          0          1  59,69   0  var     0          0          1  67,81   0  var
    |                            85                                          83,85
Nov |   0          0          0          0          3  1985    0  var     0          0
Dec |   5  1981    0  var     0          0          9  1981    0  var     0          0
Year|  14  1963    0  var    47  1976    0  1974   26  1963    0  1990   23  1983    2  63,65
    |                                                                                   72

Monthly mean wind speed at 2metres above ground level (knots)

----------------------------------------
     ----Monthly mean wind speed--------
     Average  -Windiest--    -Calmest---
                     Year          Year
----------------------------------------
Jan |   5.0     8.2  1983     2.7  1964
Feb |   4.8     9.4  1990     2.6  1985
Mar |   5.4     7.7  1967     3.7  1973
Apr |   4.8     6.6  1972     3.0  1961
May |   4.2     6.0  1986     2.8  1990
Jun |   4.0     5.0  1991     2.9  1979
Jul |   3.9     5.6  74,88    2.4  1983
Aug |   3.9     5.8  1985     2.7  81,84
Sep |   3.9     5.4  1983     2.2  1971
Oct |   3.8     6.1  1967     1.9  1979
Nov |   4.5     7.2  1977     2.2  1958
Dec |   5.0     8.5  1974     2.6  1984
Year|   4.4     5.9  1988     3.9  59,64,
    |                              71,84

Extreme daily wind speeds at 2 metres above ground level (knots)

------------------------------------------------------------------------------
     ----Highest daily wind speed-------   -----Lowest daily wind speed-------
     Average  -Windiest--    --Lowest---   Average  -Highest--     -Calmest---
                     Year          Year                    Year          Year
------------------------------------------------------------------------------
Jan |  12.7    19.6  1990     5.3  1970     0.6      1.8   1975     0.0  62,68,
    |                                                                       79
Feb |  11.7    18.0  1984     6.3  1963     1.0      3.1   1970     0.0  1964
Mar |  12.7    20.2  1986     7.6  1964     1.2      3.1   1967     0.0  1964
Apr |  10.3    14.2  1969     5.8  1984     1.2      2.7   1975     0.0  1968
May |   9.2    14.7  1968     5.8  1971     1.3      2.1   1980     0.0  1990
Jun |   8.4    12.3  1987     6.2  1988     1.3      2.1   1991     0.7  1979
Jul |   7.9    11.0  1964     5.4  1982     1.4      2.6   1988     0.3  1985
Aug |   9.0    21.8  1972     6.2  1976     1.0      1.7   1989     0.2  1965
Sep |  10.2    14.6  1983     5.7  1971     0.8      1.7   1975     0.0  1961
Oct |  10.0    16.0  1989     5.1  1979     0.7      1.4   1990     0.0  61,64,
    |                                                                       79
Nov |  11.3    18.7  1972     5.1  1958     0.7      1.5   1980     0.0  61,79
Dec |  12.5    18.6  1962     7.2  1984     0.7      4.5   1974     0.0  var
Year|  10.5    21.8  1972    11.2  1959     1.0      0.8   1974     0.0  var
Data not available for Jan 1953 - Oct 1958, Mar 1962, Feb 1968, Nov - Dec 1978, Apr 1980.

Longest absolute droughts

1976      25 Jul - 27 Aug          34 days   trace
1953      22 Feb - 25 Mar          32 days   trace
1984      12 Apr - 9 May           28 days   trace
1986      16 Sep - 13 Oct          28 days   trace
1954      5 Apr - 30 Apr           26 days   trace
1961      7 May - 31 May           25 days   trace
1982      8 Apr - 30 Apr           23 days   0.1mm
1985      9 Oct - 31 Oct           23 days   0.1mm
1990      7 Jul - 28 Jul           22 days   trace
1980      3 Apr - 23 Apr           21 days   0.2mm
1991      24 Aug - 13 sep          21 days   0.1mm
1956      9 Feb - 28 Feb           20 days   trace
1972      19 Sep - 8 Oct           20 days   trace

Longest sunless spells

1953      3 Nov - 18 Nov           16 days
1970      8 Jan - 21 Jan           14 days
1987      14 Jan - 27 Jan          14 days
1962      26 Dec - 7 Jan           13 days
1968      3 Dec - 15 Dec           13 days
1976      12 Dec - 23 Dec          12 days
1959      6 Feb - 17 Feb           12 days
1969      11 Mar - 21 Mar          11 days
1956      19 Nov - 28 Nov          10 days
1958      20 Nov - 29 Nov          10 days
1966      20 Jan - 29 Jan          10 days
1979      14 Jan - 23 Jan          10 days

Longest frost spells (min temp below 0.0 degC (32 degF or less))

1962      23 Dec - 27 Jan          36 days
1955      10 Feb - 14 Mar          33 days
1986      5 Feb - 4 Mar            28 days
1963      9 Feb - 4 Mar            24 days
1985      1 Jan - 20 Jan           20 days
1954      23 Jan - 10 Feb          19 days
1956      10 Feb - 28 Feb          19 days
1979      18 Jan - 31 Jan          18 days
1983      9 Feb - 24 Feb           16 days
1991      1 Feb - 16 Feb           16 days
1961      15 Dec - 29 Dec          15 days
1962      22 Feb - 8 Mar           15 days

Longest ice spells (max temp below 0.0degC (32 degF or less))

1963      17 Jan - 24 Jan          8 days
1954      26 Jan - 2 Feb           7 days
1956      19 Feb - 24 Feb          6 days
1981      8 Dec - 12 Dec           5 days
1963      1 Feb - 4 Feb            4 days
1987      11 Jan - 14 Jan          4 days
1991      6 Feb - 9 Feb            4 days
1962      4 Dec - 6 Dec            3 days
1963      11 Jan - 13 Jan          3 days
1982      8 Jan - 10 Jan           3 days

Longest hot spells (max temp 25.0degC or above)

1976      22 Jun - 8 Jul           17 days
1975      26 Jul - 8 Aug           14 days
1983      7 Jul - 18 Jul           12 days
1989      19 Jul - 28 Jul          10 days
1955      9 Jul - 17 Jul           9 days
1989      12 Jun - 20 Jun          9 days
1976      10 Aug - 17 Aug          8 days
1976      19 Aug - 26 Aug          8 days
1986      25 Jun - 2 Jul           8 days
1955      20 Aug - 26 Aug          7 days
1959      20 Jul - 26 Jul          7 days
1959      6 Sep - 12 Sep           7 days
1970      6 Jun - 12 Jun           7 days

Longest sunny spells (10 hours of sunshine each day)

1976      15 Aug - 26 Aug          12 days   140.9hrs
1976      22 Jun - 2 Jul           11 days   151.3hrs
1990      27 Apr - 7 May           11 days   138.1hrs
1969      6 Jun - 14 jun           9 days    121.5hrs
1987      30 Jun - 8 Jul           9 days    106.3hrs
1957      11 Jun - 18 Jun          8 days    109.4hrs
1966      28 May - 4 Jun           8 days    104.6hrs
1975      6 Jun - 13 Jun           8 days    111.5hrs
1989      2 May - 9 May            8 days    92.9hrs
1990      18 Jul - 25 Jul          8 days    106.4hrs
1962      23 Jun - 9 Jun           7 days    88.9hrs
1963      26 Jul - 1 Aug           7 days    83.5hrs
1978      25 May - 31 May          7 days    93.5hrs

Longest snowy spells

1961      SF   31 Dec                   6ins snowfall
1962      SF   30 Dec                   5ins snowfall
1965      SF   4 Mar                    4ins snowfall
1968      SF   9 Jan                    6ins snowfall
1960      SL   15 Jan - 17 Jan          3 days, 4ins deep each day
1961/62   SL   31 Dec - 3 Jan           4 days - 6ins, 7ins, 7ins, 7ins deep
1962/63   SL   28 Dec - 27 Jan          31 days - max depth 8ins on 30 Dec
1965      SL   4 Mar - 5 Mar            2 days, 4ins deep each day
1968      SL   9 Jan - 13 Jan           5 days - 6ins, 5ins, 5ins, 5ins, 6ins deep
1981      SL   11 Dec -13 Dec           3 days - 16cm, 19cm, 18cm
1982      SL   8 Jan - 16 Jan           9 days - 11cm, 17cm, 16cm, 12cm, 5x10cm
1985      SL   9 Feb                    10cm
SF - snowfall of at least 10cm in 24hrs ending at 09GMT

SL - snow lying to a depth of at least 10cm at 09GMT

no data available 1953-58; no SF data available after 1978

Longest wet spells (1mm or more each day)

1960      11 Nov - 28 Nov          18 days   74.9mm
1967      25 Oct - 5 Nov           12 days   75.9mm
1976      22 Sep - 3 Oct           12 days   138.4mm
1979      19 May - 30 May          12 days   87.8mm
1958      28 Sep - 7 Oct           10 days   67.1mm
1983      29 Mar - 7 Apr           10 days   30.1mm
1989      11 Dec - 20 Dec          10 days   143.4mm

Hot days (maximum temperature of 32degC or more)

Jun 1957  32.8/29
Jul 1959  32.8/5
Jul 1968  32.2/1
Aug 1975  32.1/7    32.6/8
Jun 1976  33.1/26   33.7/27   32.6/28
Jul 1976  32.3/2    33.4/3    32.1/4    32.5/5    32.6/6
Jul 1983  32.0/16
Aug 1990  32.9/2    35.6/3    32.7/4

Cold days (maximum temperature of -3degC or below)

Feb 1956  -3.3/2
Jan 1963  -5.6/24
Dec 1978  -3.0/31
Jan 1985  -4.2/16
Jan 1987  -3.2/11   -6.1/12   -3.8/13
Feb 1991  -3.5/7    -3.1/9

Cold nights (minimum temperature of -12degC or below)

Jan 1962  -14.4/1   -13.9/2
Jan 1963  -15.0/23  -12.8/24  -12.8/25  -12.8/26
Dec 1981  -17.3/13
Jan 1982  -14.9/14,-14.1/15

Warm nights (minimum temperature of 17.5degC or more)

Aug 1953  18.9/6
Jul 1968  17.8/1
Jul 1969  17.8/24
Jul 1975  17.5/14
Aug 1975  19.0/5    17.5/20
Jun 1976  18.8/27
Aug 1984  17.8/31
Jul 1989  18.0/7    17.5/22   17.6/23

Wet days (rainfall total of 40mm or more)

Jul 1962  48.3/26
Jul 1964  46.7/12
Aug 1965  40.6/2
Jul 1967  41.4/22
Sep 1968  46.2/15
Aug 1969  48.5/2
Aug 1977  74.0/16
Aug 1980  40.2/14
Dec 1989  43.1/20

Sunny days (15.5 hours of sunshine or more)

Jun 1976  16.0/30
May 1985  15.7/30

Last updated 13 April 1998. This page is maintained by Roger Brugge r.bruggeREMOVE@reading.ac.uk

© 1998 Roger Brugge