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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) 20.5 26.0 37.8 54.4 67.9 77.6 81.9 79.1 70.5 58.8 41.6 25.5 53.5
Highest Mean Max. Temperature (F) 33.7 39.0 48.0 64.6 77.3 87.6 86.9 86.9 77.1 70.0 48.5 35.8 58.3
Year Highest Occurred 1990 1987 1968 1987 1988 1988 1988 1983 1978 1963 1990 1965 1987
Lowest Mean Max. Temperature (F) 8.9 17.2 27.2 45.0 62.4 69.0 74.6 74.7 63.7 53.5 32.9 11.9 50.7
Year Lowest Occurred 1977 1979 1965 1975 1973 1969 1962 1977 1965 1972 1985 1983 1972
Mean Temperature (F) 11.2 16.8 29.5 44.6 57.1 66.7 71.3 68.4 59.9 48.5 33.3 17.2 43.7
Highest Mean Temperature (F) 24.8 29.5 39.0 51.8 65.6 72.7 75.1 74.4 65.8 59.2 39.3 28.4 48.0
Year Highest Occurred 1990 1987 1973 1977 1977 1988 1983 1983 1978 1963 1963 1965 1987
Lowest Mean Temperature (F) -1.1 7.4 18.9 37.6 50.7 59.4 66.9 64.7 55.6 43.1 24.6 3.2 41.4
Year Lowest Occurred 1977 1979 1965 1975 1967 1969 1971 1986 1974 1988 1985 1983 1972
Mean Min. Temperature (F) 1.8 7.6 21.2 34.7 46.3 55.8 60.6 57.6 49.2 38.2 24.8 8.8 33.9
Highest Mean Min. Temperature (F) 15.9 19.9 31.5 40.8 54.1 59.3 63.9 61.9 54.4 48.4 30.2 20.9 37.7
Year Highest Occurred 1990 1987 1973 1977 1977 1971 1983 1983 1978 1963 1963 1965 1987
Lowest Mean Min. Temperature (F) -11.1 -2.5 10.6 29.3 38.9 49.7 56.0 53.4 43.9 30.9 16.2 -5.5 32.0
Year Lowest Occurred 1977 1979 1965 1982 1967 1969 1971 1985 1974 1988 1986 1983 1989
Mean Precipitation (in.) 0.95 0.87 2.00 3.10 4.20 3.87 4.32 4.23 3.95 2.55 1.75 1.17 32.96
Highest Precipitation (in.) 3.32 3.46 3.81 6.47 9.62 7.32 10.39 11.43 11.51 6.75 5.60 3.05 48.19
Year Highest Occurred 1967 1971 1965 1990 1982 1967 1978 1980 1965 1970 1975 1968 1973
Lowest Precipitation (in.) 0.00 0.01 0.37 0.99 1.55 1.05 0.63 0.26 0.46 0.36 0.00 0.15 18.59
Year Lowest Occurred 1984 1987 1978 1966 1985 1964 1975 1971 1975 1964 1962 1962 1976
Heating Degree Days (F) 1668. 1350. 1101. 612. 280. 56. 12. 33. 168. 512. 951. 1482. 8225.
Cooling Degree Days (F) 0. 0. 0. 0. 35. 107. 208. 139. 15. 0. 0. 0. 504.

Western Regional Climate Center, wrcc@dri.edu