SAN JUAN WSFO, PUERTO RICO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 82.4 82.8 83.4 84.9 86.3 87.6 87.4 87.8 87.8 87.5 85.1 83.2 85.5
Highest Mean Max. Temperature (F) 84.8 85.9 87.3 88.4 88.9 90.5 89.3 89.7 90.0 89.5 86.7 87.0 90.5
Year Highest Occurred 1998 1983 1983 1984 1999 1988 1995 1980 1995 1992 1981 1997 1988
Lowest Mean Max. Temperature (F) 79.8 80.1 80.2 82.3 83.9 85.0 84.3 84.4 84.9 84.5 82.2 79.9 79.8
Year Lowest Occurred 1975 1976 1976 1976 1976 1976 1977 1977 1977 1985 1984 1975 1975
Mean Temperature (F) 76.6 76.9 77.6 79.1 80.6 82.1 82.2 82.4 82.2 81.6 79.6 77.7 79.9
Highest Mean Temperature (F) 78.7 78.7 80.9 80.6 82.5 84.2 83.9 83.9 84.2 83.4 80.9 80.1 84.2
Year Highest Occurred 1998 1998 1983 1987 1980 1983 1980 1995 1995 1992 1997 1997 1995
Lowest Mean Temperature (F) 74.9 75.2 75.5 77.1 78.5 80.4 79.4 79.7 79.9 79.0 77.9 76.0 74.9
Year Lowest Occurred 1976 1976 1976 1976 1986 1976 1977 1977 1977 1985 1984 1975 1976
Mean Min. Temperature (F) 70.8 70.9 71.7 73.2 74.9 76.6 76.9 77.0 76.5 75.6 74.0 72.1 74.2
Highest Mean Min. Temperature (F) 72.6 73.1 74.4 75.0 77.1 78.3 78.7 78.2 78.4 77.2 75.2 74.1 78.7
Year Highest Occurred 1998 1981 1983 1981 1983 1980 1981 1995 1995 1992 1997 1987 1981
Lowest Mean Min. Temperature (F) 68.0 68.5 69.7 71.6 72.3 75.0 74.4 75.0 74.8 73.4 72.8 70.4 68.0
Year Lowest Occurred 1986 1986 1989 1985 1986 1986 1977 1977 1977 1985 1982 1985 1986
Mean Precipitation (in.) 3.02 2.30 2.14 3.71 5.29 3.52 4.16 5.22 5.60 5.06 6.17 4.57 50.76
Highest Precipitation (in.) 7.60 6.69 5.17 10.37 12.80 7.07 7.64 11.31 15.15 11.10 15.96 16.81 16.81
Year Highest Occurred 1977 1982 1987 1988 1986 1987 1996 1988 1996 1985 1979 1981 1981
Lowest Precipitation (in.) 0.61 0.20 0.75 0.08 0.44 0.29 1.12 1.83 1.73 1.17 1.91 1.02 0.08
Year Lowest Occurred 1978 1983 1999 1997 1972 1985 1974 1994 1987 1979 1980 1997 1997
Heating Degree Days (F) 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
Cooling Degree Days (F) 360. 332. 388. 421. 484. 513. 533. 539. 515. 513. 436. 392. 5426.

Southeast Regional Climate Center, sercc@climate.ncsu.edu