Monthly Extremes for Primary Climatological Data Sites

 Wettest -Highest total precipitation for the calendar month/ Driest- Lowest total precipitation for the calendar month

Hottest - Highest average temperatures for the calendar month/ Coolest - Lowest average temperature for the calendar month 

San Juan International Airport (climate records since 1898)

  Wettest Driest Hottest Coolest
1  18.56" Aug 2011  Trace Mar 2005  85.7°F Jun 2012 73.3°F Feb 1951
2  16.88" May 1936  0.05" Feb 1941  85.4°F Jun 1983 73.3°F Jan 1950
3  16.81" Dec 1981  0.08" Apr 1997  85.2°F Jun 2014 73.3°F Feb 1917
4  15.96" Nov 1979  0.09" Feb 1902  85.1°F Jul 1980 73.4°F Feb 1925
5  15.64" Nov 1931   0.16" Jun 2012  85.1°F Jun 1980 73.4°F Jan 1917
6  15.47" Jan 1937  0.20" Feb 1983 85.0°F Jul 2014 73.4°F Feb 1907
7  15.40" Dec 1910  0.28" Apr 1984   85.0°F Aug 1980 73.4°F Jan 1907 
8  15.15" Sep 1996  0.29" Jun 1985   84.9°F Sep 2012  73.6 °F Feb 1950
9  15.06" Oct 1970  0.42" Apr 1935 84.9°F Sep 1995  73.6°F Feb 1949
10  15.04" Nov 1950 0.44"   Jun 2014 84.9°F Jul 1981 73.6°F Feb 1938

Saint Thomas/Cyril E. King Airport (climate records since 1956)

  Wettest Driest Hottest Coolest
1 18.39" Nov 2003 0.01" Mar 2008 87.3°F Aug 1994 75.0°F Jan 1955
2 16.20" Oct 2010 0.03" Jul 2007 87.2°F Aug 1993 75.7 °F Dec 2010
3 14.94" Sep 1953 0.06" May 2008 86.6°F Jul 1979 75.8°F Feb 1956
4 14.73" Nov 1984 0.07" Jun 2007 86.5°F Jul 1994 76.0°F Jan 1956
5 13.89" Sep 2004 0.08" Jun 2012 86.4°F Jun 1994 76.2°F Feb 1999
6 12.86" Sep 2008 0.14"   Jun 2014 86.3°F Sep 1993 76.2°F Feb 1955
7 12.49" Oct 2005 0.18" Jun 2003 86.2°F Jul 1993 76.2°F Feb 1954
8 12.45" Oct 1974 0.23" Apr 1953 86.2°F Jun 1996 76.2°F Dec 1954
9 12.39" Oct 1954 0.24" Jul 1956 85.9°F May 1994 76.5°F Jan 2000
10 11.43'  Sep 1979 0.28"  May 2007 85.8°F Jul 1992 76.5°F Jan 1953

Saint Croix/Henry E. Rohlsen Airport (climate records since 1951)

  Wettest Driest Hottest Coolest
1 19.15" Sep 1996  0.00" Apr 1988  86.5°F Aug 1989  73.4°F Jan 2012
2 18.03" Nov 2003   0.02" Apr 1997  86.5°F Jul 1989  74.8°F Feb 2012
3 16.34" Nov 1974   0.10" June 2001   85.6°F Jun 1980 75.2°F Jan 1979 
4 16.20" Oct 1977  0.11"  Feb 2005  85.3°F Sep 1993 75.5°F Jan 1955 
5 14.03" May 1981  0.12" June 1985  85.3°F Jul 1985  75.7°F Apr 1982
6 13.25" Nov 1987  0.17" Mar 1951 85.0°F Jul 2014  75.7°F Jan 1965
7 12.95" Oct 1990 0.22" May 1974  85.0°F Jun 1972  75.8°F Mar 1951
8 12.70" Nov 1984  0.22" Apr 1953    84.9°F Sep 1972 75.8°F Dec 1964 
9 11.79" Oct 1954 0.26"  Jun 2012  84.9°F Jul 1972 75.9°F Dec 2010 
10 11.38" May 2001 0.29"   Mar 2003  84.8°F Aug 1997 75.9°F Mar 1982 

Click here to return to unique local climate data web page for the NWS San Juan

 updated Aug 2014 


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