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