WILMINGTON WSO ARPT, DELAWARE

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 38.7 41.9 52.1 62.6 72.9 81.4 85.6 84.1 77.7 66.6 55.5 43.9 63.6
Highest Mean Max. Temperature (F) 49.1 51.8 58.2 70.7 78.3 84.3 89.2 87.9 82.6 72.2 61.3 51.0 66.6
Year Highest Occurred 1990 1976 1973 1985 1965 1984 1988 1980 1961 1963 1975 1984 1990
Lowest Mean Max. Temperature (F) 28.9 29.7 44.0 57.1 64.9 77.4 82.4 80.5 73.4 61.3 49.4 32.5 61.4
Year Lowest Occurred 1977 1979 1984 1966 1967 1972 1978 1967 1962 1976 1967 1989 1978
Mean Temperature (F) 30.6 33.4 42.7 52.2 62.5 71.5 76.4 75.0 68.0 56.2 46.3 35.8 54.2
Highest Mean Temperature (F) 40.5 41.2 49.4 58.0 66.3 75.8 79.4 78.2 73.1 62.9 51.0 42.1 57.1
Year Highest Occurred 1990 1976 1973 1985 1965 1973 1988 1980 1961 1971 1985 1984 1973
Lowest Mean Temperature (F) 20.8 22.1 35.6 47.5 55.4 67.9 73.3 72.0 63.7 51.0 40.4 25.0 52.0
Year Lowest Occurred 1977 1979 1984 1975 1967 1979 1962 1982 1984 1988 1976 1989 1978
Mean Min. Temperature (F) 22.4 24.8 33.1 41.8 52.2 61.6 67.1 65.9 58.2 45.7 37.0 27.6 44.8
Highest Mean Min. Temperature (F) 31.9 30.8 40.5 45.5 55.5 67.7 69.5 70.0 63.9 55.0 43.8 35.3 48.2
Year Highest Occurred 1990 1990 1973 1973 1975 1973 1988 1973 1971 1971 1985 1972 1973
Lowest Mean Min. Temperature (F) 12.7 13.9 27.2 37.6 45.8 57.7 64.1 61.5 52.3 40.2 30.7 17.5 42.5
Year Lowest Occurred 1977 1978 1984 1975 1967 1980 1962 1982 1984 1987 1976 1989 1978
Mean Precipitation (in.) 3.03 2.91 3.43 3.39 3.84 3.55 4.23 3.40 3.43 2.88 3.27 3.48 40.84
Highest Precipitation (in.) 8.41 7.02 6.84 6.80 7.38 7.49 12.63 11.16 8.53 6.41 7.84 7.90 54.70
Year Highest Occurred 1978 1979 1983 1983 1983 1972 1989 1967 1966 1971 1972 1969 1983
Lowest Precipitation (in.) 0.52 0.83 0.81 0.35 0.22 0.21 1.38 0.25 0.82 0.21 0.49 0.80 24.90
Year Lowest Occurred 1981 1980 1966 1985 1964 1988 1977 1972 1970 1963 1976 1985 1965
Heating Degree Days (F) 1066. 885. 691. 384. 122. 0. 0. 0. 35. 288. 561. 905. 4937.
Cooling Degree Days (F) 0. 0. 0. 0. 44. 199. 353. 310. 125. 15. 0. 0. 1046.

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