May Temperature and Precipitation Normals (1971-2000)
                       and Extremes for Houston (1889-2009)
                               (last update 6/1/09)
                              
    --------------- TEMPERATURE ---------------------    ------ PRECIPITATION -----
     NORMAL   RECORD       LOW      RECORD     HIGH       RECORD    CUMULATIVE PCPN 
    MAX MIN  MAX YEAR      MAX     MIN YEAR    MIN         PCPN      DAILY  YEARLY 
    --------------------------------------------------   --------------------------                              
 1  81  63   94  1947    63 1907   45  1908   75 2002    4.11 1970    0.14  13.76 
 2  82  63   96  1964    65 1911   45  1976   76 2009*   3.48 1944    0.28  13.90
 3  82  64   93  1890    60 1978   47  1978   77 2002    5.10 1981    0.42  14.04
 4  82  64   94  1890    70 1966   44  1978   76 2003    1.72 1953    0.57  14.19 
 5  83  64   94  1906    66 1935   49  1970   76 2007*   3.60 1912    0.72  14.34
 
 6  83  64   94  1906    63 1917   50  1970   76 2007    5.00 1938    0.87  14.49
 7  84  65   94  1998    64 1917   47  1891   77 2002    2.61 1938    1.02  14.64
 8  84  65   96  1967    69 1917   45  1906   78 2002    2.34 2005    1.17  14.79  
 9  84  65   94  1998    67 1924   46  1984   77 2002    2.42 1987    1.33  14.95
10  84  65   94  1927    69 1898   51  1984   76 2003    5.89 1968    1.49  15.11 

11  85  65   94  1890    68 1898   47  1981   76 2002    2.16 1959    1.65  15.27
12  85  66   92  1967    68 1917   50  1895   77 2002    5.27 1914    1.81  15.43
13  85  66   94  1907    70 1914   50  1895   78 1995    2.74 1966    1.97  15.59
14  85  66   93  1995    66 1953   47  1971   80 1995    2.08 1908    2.13  15.75
15  85  66   92  2003*   72 1934   49  1890   78 1995    4.64 1970    2.30  15.92

16  86  66   93  2003*   68 1945   47  1973   78 1974    2.80 1992    2.47  16.09
17  87  66   95  1894    68 1895   52  1970   79 1995    4.20 1989    2.64  16.26
18  87  66   95  1890    72 1916   50  1976   77 1981    6.16 1989    2.81  16.43
19  87  66   95  2003    71 1952   50  1976   77 1990    6.87 2000    2.98  16.60
20  87  66   95  2008    74 1958   48  1894   78 1990    4.17 1947    3.15  16.77
 
21  87  67   96  2005    71 1967   53  1892   77 1990    5.45 1945    3.32  16.94
22  87  67   96  2005*   65 1895   48  1892   77 2008    3.10 1963    3.50  17.12
23  87  67   95  1996    72 1947   45  1892   78 2008    3.99 1959    3.68  17.30
24  87  67   95  1955    74 1919   54  1892   78 1962    3.96 1936    3.86  17.48
25  87  68   95  1927    74 1936   56  1979   78 1980    2.47 1946    4.04  17.66

26  88  68   95  1958    76 1919   57  1979   79 1996    1.36 2007    4.22  17.84
27  88  68   98  1928    74 1901   50  1901   80 1996    3.99 1914    4.40  18.02
28  88  68   98  1906    73 1936   54  1901   81 1996    2.83 1914    4.58  18.20
29  88  68   99  1996    69 1992   58  1984   77 1953    4.33 2006    4.77  18.39
30  88  69   97  2003*   73 1947   53  1984   80 2004    5.01 1907    4.96  18.58

31  88  70   98  1998*   73 1992   50  1889   80 2004    3.45 1976    5.15  18.77

* indicates a record that has been tied on a previous year 

May Normals
 high:             85.5F    
 low:              66.1F  
 mean temperature: 75.8F   
 rainfall:         5.15"
 heating DD            0           
 cooling DD          295