LEWES, DELAWARE

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 43.1 45.4 54.1 63.6 72.9 81.2 84.8 83.9 78.4 68.1 58.8 48.3 65.2
Highest Mean Max. Temperature (F) 53.4 57.2 59.3 71.0 79.4 86.5 89.8 87.7 83.0 73.1 64.8 57.3 69.0
Year Highest Occurred 1990 1976 1963 1985 1985 1986 1986 1988 1970 1990 1985 1984 1990
Lowest Mean Max. Temperature (F) 33.4 34.3 48.3 58.5 67.0 75.8 73.1 80.5 73.7 62.2 52.3 36.7 63.3
Year Lowest Occurred 1977 1978 1984 1975 1967 1984 1984 1967 1963 1976 1976 1989 1978
Mean Temperature (F) 34.5 36.6 44.6 53.3 62.9 71.6 75.9 74.9 69.2 58.4 49.5 39.7 55.9
Highest Mean Temperature (F) 44.7 46.0 49.4 58.3 67.6 76.3 80.2 79.1 73.1 63.7 57.3 49.1 59.9
Year Highest Occurred 1990 1990 1977 1985 1985 1989 1986 1988 1980 1990 1985 1982 1990
Lowest Mean Temperature (F) 24.1 26.0 39.9 48.7 57.5 68.1 69.0 70.9 64.7 53.8 41.7 29.2 54.0
Year Lowest Occurred 1977 1978 1969 1975 1967 1984 1984 1964 1963 1976 1976 1989 1967
Mean Min. Temperature (F) 25.9 27.7 35.2 42.9 52.9 61.8 66.9 65.9 60.1 48.6 40.1 31.0 46.6
Highest Mean Min. Temperature (F) 36.0 35.5 39.8 46.4 55.7 67.9 70.5 70.4 64.7 56.9 49.8 41.0 50.8
Year Highest Occurred 1990 1990 1973 1981 1985 1989 1987 1988 1961 1971 1985 1982 1990
Lowest Mean Min. Temperature (F) 14.7 17.6 30.9 38.8 47.9 58.3 63.6 59.9 55.7 43.9 31.0 21.6 44.6
Year Lowest Occurred 1977 1978 1965 1965 1967 1979 1962 1964 1963 1981 1976 1989 1967
Mean Precipitation (in.) 3.76 3.30 4.11 3.56 3.76 3.38 3.98 5.24 3.09 3.17 3.28 3.68 44.31
Highest Precipitation (in.) 8.79 6.84 7.86 8.71 8.36 7.64 11.26 13.73 6.42 6.85 7.17 7.33 64.28
Year Highest Occurred 1987 1979 1984 1983 1984 1982 1989 1967 1989 1971 1972 1977 1989
Lowest Precipitation (in.) 0.32 1.24 1.02 0.54 0.20 0.29 0.65 0.78 0.53 0.26 0.78 0.39 29.29
Year Lowest Occurred 1981 1980 1986 1985 1964 1971 1974 1984 1978 1963 1965 1988 1968
Heating Degree Days (F) 946. 795. 632. 351. 110. 9. 0. 0. 20. 229. 465. 784. 4341.
Cooling Degree Days (F) 0. 0. 0. 0. 44. 207. 338. 307. 146. 24. 0. 0. 1066.

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