WILMINGTON WSO ARPT, DELAWARE

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 39.3 42.5 51.9 62.6 72.5 81.1 86.0 84.1 77.2 65.9 55.0 44.4 63.5
Highest Mean Max. Temperature (F) 48.4 51.0 58.0 69.8 80.0 86.1 91.0 87.8 81.9 70.4 60.7 50.4 91.0
Year Highest Occurred 1990 1976 2000 1985 1991 1994 1999 1980 1980 1995 1975 1984 1999
Lowest Mean Max. Temperature (F) 28.2 28.9 43.1 56.4 68.7 77.0 81.0 80.8 73.9 60.9 48.5 31.9 28.2
Year Lowest Occurred 1977 1979 1984 1975 1978 1972 2000 2000 1975 1976 1996 1989 1977
Mean Temperature (F) 31.5 34.2 42.7 52.4 62.5 71.5 76.6 75.0 67.7 55.8 45.9 36.4 54.4
Highest Mean Temperature (F) 40.2 41.0 48.4 58.4 68.7 75.8 80.0 78.2 71.2 62.2 50.7 41.8 80.0
Year Highest Occurred 1990 1998 1973 1994 1991 1994 1999 1980 1980 1971 1985 1984 1999
Lowest Mean Temperature (F) 20.5 21.7 35.1 47.0 58.6 67.7 72.9 72.0 63.5 50.7 40.1 24.7 20.5
Year Lowest Occurred 1977 1979 1984 1975 1997 1979 2000 1982 1984 1988 1996 1989 1977
Mean Min. Temperature (F) 23.7 25.8 33.4 42.1 52.4 61.8 67.3 65.8 58.1 45.6 36.9 28.4 45.1
Highest Mean Min. Temperature (F) 32.3 33.4 39.6 47.1 57.5 66.7 71.1 69.2 63.1 54.2 43.8 34.6 71.1
Year Highest Occurred 1998 1998 1973 1994 1991 1973 1994 1973 1971 1971 1985 1972 1994
Lowest Mean Min. Temperature (F) 12.7 13.9 27.2 37.6 48.3 57.7 64.4 61.5 52.3 40.2 30.7 17.5 12.7
Year Lowest Occurred 1977 1978 1984 1975 1997 1980 1978 1982 1984 1987 1976 1989 1977
Mean Precipitation (in.) 3.43 2.81 3.97 3.39 4.15 3.59 4.28 3.51 4.01 3.08 3.19 3.40 42.81
Highest Precipitation (in.) 8.41 7.02 9.17 6.80 7.38 7.49 12.63 8.38 12.68 8.01 7.84 7.96 12.68
Year Highest Occurred 1978 1979 2000 1983 1983 1972 1989 1971 1999 1995 1972 1996 1999
Lowest Precipitation (in.) 0.52 0.83 1.16 0.35 0.82 0.21 0.89 0.25 1.29 0.08 0.49 0.80 0.08
Year Lowest Occurred 1981 1980 1987 1985 1997 1988 1999 1972 1977 2000 1976 1985 2000
Heating Degree Days (F) 1029. 864. 687. 376. 132. 15. 1. 2. 49. 297. 564. 872. 4888.
Cooling Degree Days (F) 0. 0. 2. 9. 62. 215. 368. 317. 135. 16. 1. 0. 1125.

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