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NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 14.0 20.4 33.6 53.4 69.6 78.1 82.8 81.3 69.8 56.7 35.7 19.4 51.2
Highest Mean Max. Temperature (F) 30.3 31.9 43.6 67.2 80.8 88.9 88.2 87.9 77.7 68.7 45.2 30.3 56.3
Year Highest Occurred 1990 1987 1981 1987 1977 1988 1989 1983 1976 1963 1981 1979 1987
Lowest Mean Max. Temperature (F) 0.6 5.6 24.6 41.7 60.8 69.5 77.1 73.2 57.8 47.8 24.6 6.7 47.3
Year Lowest Occurred 1966 1979 1970 1979 1979 1969 1971 1977 1965 1969 1985 1983 1979
Mean Temperature (F) 5.2 11.4 25.1 42.8 56.8 66.0 70.7 68.6 57.9 46.2 27.9 11.2 40.8
Highest Mean Temperature (F) 20.2 25.2 36.0 53.2 67.6 74.7 76.4 74.8 63.3 56.4 37.7 21.9 46.5
Year Highest Occurred 1990 1987 1973 1987 1977 1988 1989 1983 1978 1963 1981 1979 1987
Lowest Mean Temperature (F) -7.2 -3.5 13.4 34.1 49.0 58.1 65.4 61.2 48.8 40.3 15.8 0.4 37.3
Year Lowest Occurred 1966 1979 1970 1979 1979 1969 1971 1977 1965 1969 1985 1983 1979
Mean Min. Temperature (F) -3.5 2.2 16.6 32.2 43.9 53.8 58.6 55.9 46.0 35.7 20.0 3.0 30.4
Highest Mean Min. Temperature (F) 10.4 18.4 29.3 39.1 54.3 60.4 64.6 61.7 51.1 44.0 30.1 14.9 36.6
Year Highest Occurred 1983 1987 1973 1987 1977 1988 1989 1983 1978 1963 1981 1987 1987
Lowest Mean Min. Temperature (F) -16.3 -12.5 2.1 26.5 37.2 46.6 53.6 49.1 39.8 27.5 6.9 -6.0 27.3
Year Lowest Occurred 1982 1979 1970 1979 1979 1969 1971 1977 1974 1976 1985 1985 1979
Mean Precipitation (in.) 0.74 0.48 0.96 1.51 2.05 3.15 2.84 2.56 2.34 1.32 0.68 0.59 19.22
Highest Precipitation (in.) 2.65 1.40 2.42 3.60 6.52 9.38 7.40 5.51 6.35 4.58 2.75 1.19 27.80
Year Highest Occurred 1989 1979 1990 1979 1962 1964 1987 1980 1965 1982 1977 1977 1965
Lowest Precipitation (in.) 0.06 0.05 0.01 0.00 0.29 1.18 0.38 0.32 0.38 0.17 0.02 0.08 12.88
Year Lowest Occurred 1973 1973 1969 1988 1967 1972 1976 1967 1984 1978 1990 1979 1963
Heating Degree Days (F) 1854. 1501. 1237. 666. 298. 87. 21. 57. 234. 583. 1113. 1668. 9319.
Cooling Degree Days (F) 0. 0. 0. 0. 44. 117. 198. 169. 21. 0. 0. 0. 549.

Western Regional Climate Center, wrcc@dri.edu