RIO PIEDRAS EXP STN, PUERTO RICO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 84.0 84.4 85.2 86.7 88.0 89.5 89.4 89.5 89.5 89.0 86.7 84.6 87.2
Highest Mean Max. Temperature (F) 87.1 87.5 87.9 89.5 90.9 92.1 91.7 91.3 91.2 91.2 89.0 89.2 92.1
Year Highest Occurred 1998 1998 1983 1984 1999 1997 2000 1998 1987 2000 1972 1997 1997
Lowest Mean Max. Temperature (F) 81.7 82.6 82.4 84.2 85.6 86.0 87.5 87.5 87.7 86.4 84.0 81.4 81.4
Year Lowest Occurred 1974 1999 1979 1977 1979 1989 1978 1977 1977 1975 1984 1975 1975
Mean Temperature (F) 75.0 75.2 75.8 77.4 79.3 80.9 81.0 81.2 80.9 80.5 78.5 76.1 78.5
Highest Mean Temperature (F) 77.9 77.6 78.4 80.2 81.8 82.7 82.5 82.9 82.7 81.9 80.5 79.5 82.9
Year Highest Occurred 1998 1998 1983 1987 1999 1998 2000 1987 1987 1987 1990 1997 1987
Lowest Mean Temperature (F) 72.6 73.8 73.9 75.3 77.4 78.8 79.3 79.3 78.5 78.1 76.4 74.2 72.6
Year Lowest Occurred 1976 1994 2000 1975 1975 1976 1993 1974 1993 1975 1975 1975 1976
Mean Min. Temperature (F) 66.0 66.0 66.4 68.0 70.6 72.2 72.5 72.9 72.3 71.9 70.2 67.6 69.7
Highest Mean Min. Temperature (F) 68.6 67.8 68.8 71.7 72.7 74.3 74.5 75.0 74.3 74.0 72.1 71.1 75.0
Year Highest Occurred 1998 1997 1998 1987 1980 1988 1983 1990 1990 1990 1990 1998 1990
Lowest Mean Min. Temperature (F) 62.8 61.9 63.7 64.7 68.0 69.3 69.2 70.0 67.0 69.6 67.1 65.5 61.9
Year Lowest Occurred 1976 1994 1993 1994 1975 1975 1993 1974 1993 1974 1975 1985 1994
Mean Precipitation (in.) 4.32 3.67 3.31 5.03 6.82 4.61 5.52 7.34 7.25 7.51 8.09 5.50 68.97
Highest Precipitation (in.) 7.62 9.53 9.52 15.18 20.76 11.39 9.65 17.70 12.27 17.28 17.74 13.11 20.76
Year Highest Occurred 1977 1979 1981 1973 1979 1979 1982 1979 1975 1974 1979 1981 1979
Lowest Precipitation (in.) 1.57 0.79 0.93 0.09 1.72 0.72 1.71 1.58 3.27 1.53 2.53 1.08 0.09
Year Lowest Occurred 1983 1986 1984 1997 1973 1977 1991 1993 1971 1991 1980 1997 1997
Heating Degree Days (F) 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.
Cooling Degree Days (F) 309. 285. 335. 370. 444. 474. 494. 501. 477. 479. 405. 344. 4917.

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