NINETY NINE ISLANDS, SOUTH CAROLINA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 50.5 55.1 62.9 71.3 77.7 83.9 87.5 86.0 80.4 71.7 62.0 53.2 70.2
Highest Mean Max. Temperature (F) 59.3 64.3 68.6 76.4 82.9 89.2 94.4 91.8 84.5 77.9 68.4 62.1 94.4
Year Highest Occurred 1974 1976 2000 1986 2000 1986 1993 1999 1973 1984 1999 1984 1993
Lowest Mean Max. Temperature (F) 39.7 46.1 56.9 66.0 73.2 77.9 83.0 81.9 77.0 66.2 54.4 45.1 39.7
Year Lowest Occurred 1977 1978 1971 1984 1997 1997 1979 1992 1974 1976 1996 2000 1977
Mean Temperature (F) 39.0 42.3 49.6 57.1 65.2 72.6 76.8 75.7 69.5 58.5 49.0 41.4 58.1
Highest Mean Temperature (F) 50.0 48.6 54.1 61.4 70.3 76.9 81.2 79.4 73.1 65.8 57.0 49.6 81.2
Year Highest Occurred 1974 1990 2000 1999 1991 1986 1993 1999 1973 1984 1985 1971 1993
Lowest Mean Temperature (F) 28.5 34.0 44.1 52.5 60.7 68.2 73.7 72.9 66.8 52.2 42.0 34.1 28.5
Year Lowest Occurred 1977 1978 1971 1983 1997 1972 1979 1997 1984 1987 1976 2000 1977
Mean Min. Temperature (F) 27.4 29.5 36.2 42.9 52.7 61.3 66.1 65.3 58.5 45.2 35.9 29.5 45.9
Highest Mean Min. Temperature (F) 40.7 36.4 42.7 49.2 60.6 65.6 69.0 69.1 62.2 53.9 48.0 38.8 69.1
Year Highest Occurred 1974 1998 1973 1991 1991 1994 1991 1995 1980 1971 1985 1971 1995
Lowest Mean Min. Temperature (F) 17.2 21.5 30.5 37.7 47.9 55.5 62.9 61.1 53.5 35.7 28.4 23.0 17.2
Year Lowest Occurred 1977 1977 1981 1971 1981 1972 1976 1997 1999 1987 1976 2000 1977
Mean Precipitation (in.) 4.53 4.07 4.93 3.05 4.15 3.76 3.78 4.83 4.08 3.85 3.67 3.67 48.37
Highest Precipitation (in.) 8.25 6.60 9.54 6.65 10.52 10.47 10.91 11.89 9.73 14.93 8.83 8.75 14.93
Year Highest Occurred 1978 1997 1980 1998 1975 1995 1971 1994 1987 1990 1985 1983 1990
Lowest Precipitation (in.) 0.30 0.64 1.15 0.39 1.13 0.17 0.85 0.88 0.59 0.00 0.88 0.83 0.00
Year Lowest Occurred 1981 1978 1985 1976 1988 1986 1977 1999 1985 2000 1973 1980 2000
Heating Degree Days (F) 807. 637. 480. 243. 88. 8. 0. 0. 21. 236. 483. 734. 3737.
Cooling Degree Days (F) 0. 0. 0. 7. 94. 236. 366. 330. 155. 33. 2. 0. 1223.

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