SULLIVANS ISLAND, SOUTH CAROLINA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 57.3 60.3 67.1 73.9 81.1 86.2 88.9 88.0 84.3 77.5 69.9 61.7 74.7
Highest Mean Max. Temperature (F) 70.2 68.3 74.6 79.8 85.7 90.7 91.6 91.3 89.4 81.0 75.3 69.5 77.8
Year Highest Occurred 1974 1990 1979 1979 1962 1977 1977 1980 1970 1971 1978 1978 1990
Lowest Mean Max. Temperature (F) 50.3 50.7 61.6 69.6 78.1 82.5 85.4 84.8 80.5 73.3 65.1 54.4 73.4
Year Lowest Occurred 1977 1978 1978 1983 1983 1979 1964 1976 1967 1987 1962 1963 1983
Mean Temperature (F) 48.1 50.4 57.6 64.8 72.4 78.5 81.3 80.6 76.6 68.2 60.1 52.3 65.9
Highest Mean Temperature (F) 62.0 59.4 63.3 70.1 76.6 81.7 84.0 83.4 80.1 73.5 67.8 60.8 69.4
Year Highest Occurred 1974 1990 1979 1979 1962 1990 1986 1983 1980 1985 1985 1971 1990
Lowest Mean Temperature (F) 40.2 41.6 51.0 61.0 68.0 75.0 78.9 77.6 72.5 63.0 54.1 45.1 64.2
Year Lowest Occurred 1977 1978 1971 1975 1971 1974 1964 1976 1967 1987 1969 1989 1988
Mean Min. Temperature (F) 38.9 40.5 47.9 55.6 63.7 70.7 73.7 73.2 68.8 58.9 50.3 42.8 57.1
Highest Mean Min. Temperature (F) 53.8 50.5 54.1 60.3 67.8 75.3 76.6 76.8 72.6 66.9 61.7 52.9 60.8
Year Highest Occurred 1974 1990 1990 1979 1975 1986 1986 1983 1986 1985 1985 1971 1990
Lowest Mean Min. Temperature (F) 30.1 32.1 38.3 50.5 56.1 65.3 70.5 70.2 63.4 52.7 40.9 35.6 54.9
Year Lowest Occurred 1977 1980 1971 1974 1971 1974 1970 1989 1981 1987 1969 1989 1970
Mean Precipitation (in.) 3.68 3.53 4.39 2.74 3.50 5.41 5.11 7.05 4.47 3.46 2.88 3.37 49.59
Highest Precipitation (in.) 8.71 7.67 9.46 7.62 14.33 17.90 17.88 20.62 13.76 14.29 10.18 6.44 77.69
Year Highest Occurred 1987 1964 1965 1982 1976 1973 1964 1971 1987 1990 1969 1976 1971
Lowest Precipitation (in.) 0.65 0.68 0.61 0.00 0.55 0.89 1.25 1.01 0.45 0.23 0.55 0.74 36.59
Year Lowest Occurred 1974 1962 1968 1976 1977 1978 1973 1980 1986 1966 1966 1984 1970
Heating Degree Days (F) 534. 415. 250. 69. 0. 0. 0. 0. 0. 47. 185. 406. 1906.
Cooling Degree Days (F) 10. 6. 21. 63. 234. 405. 505. 484. 348. 147. 38. 12. 2273.

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