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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) 18.1 24.2 37.5 54.9 69.2 78.2 84.8 83.2 71.8 59.2 39.2 23.9 53.7
Highest Mean Max. Temperature (F) 31.8 38.0 49.7 68.6 80.7 93.3 93.0 91.6 79.8 71.5 48.2 34.4 59.7
Year Highest Occurred 1990 1987 1981 1987 1977 1988 1988 1983 1978 1963 1981 1979 1987
Lowest Mean Max. Temperature (F) 5.5 12.4 26.4 41.2 61.9 68.5 76.8 77.3 57.1 52.3 27.2 8.4 49.7
Year Lowest Occurred 1982 1979 1965 1975 1974 1969 1962 1966 1965 1969 1985 1983 1972
Mean Temperature (F) 6.8 12.9 26.9 43.1 56.1 65.7 71.6 69.4 58.2 45.8 28.3 13.1 41.5
Highest Mean Temperature (F) 21.8 27.7 36.3 51.7 66.5 75.3 75.6 77.0 65.4 56.2 36.2 22.9 46.7
Year Highest Occurred 1990 1987 1973 1987 1977 1988 1989 1983 1978 1963 1981 1979 1987
Lowest Mean Temperature (F) -6.1 -0.2 15.3 34.6 50.4 57.7 66.2 65.7 48.1 40.7 15.2 -1.6 38.7
Year Lowest Occurred 1982 1979 1969 1975 1967 1969 1971 1986 1965 1976 1985 1983 1972
Mean Min. Temperature (F) -4.6 1.6 16.2 31.2 42.9 53.2 58.4 55.6 44.5 32.4 17.4 2.2 29.3
Highest Mean Min. Temperature (F) 11.8 17.4 27.6 36.6 52.2 58.8 62.5 62.4 51.0 40.8 24.2 14.8 33.7
Year Highest Occurred 1990 1987 1973 1977 1977 1963 1983 1983 1978 1963 1981 1987 1987
Lowest Mean Min. Temperature (F) -17.7 -12.8 3.6 26.6 37.5 46.9 53.8 51.4 39.0 26.0 3.1 -11.5 26.5
Year Lowest Occurred 1982 1979 1969 1988 1967 1969 1971 1967 1965 1976 1985 1983 1989
Mean Precipitation (in.) 0.55 0.53 1.07 2.20 2.48 3.58 2.35 1.99 2.13 1.22 0.69 0.51 19.30
Highest Precipitation (in.) 1.65 1.93 3.09 7.52 5.97 10.52 8.43 6.43 4.89 5.25 2.26 1.63 29.63
Year Highest Occurred 1969 1969 1987 1986 1972 1975 1962 1966 1977 1982 1970 1972 1986
Lowest Precipitation (in.) 0.00 0.00 0.13 0.00 0.15 0.72 0.10 0.28 0.22 0.00 0.00 0.00 8.90
Year Lowest Occurred 1987 1985 1985 1987 1990 1972 1976 1982 1979 1987 1990 1989 1976
Heating Degree Days (F) 1804. 1459. 1181. 657. 307. 89. 18. 38. 230. 595. 1101. 1609. 9088.
Cooling Degree Days (F) 0. 0. 0. 0. 31. 110. 223. 175. 26. 0. 0. 0. 565.
Western Regional Climate Center, wrcc@dri.edu