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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) 24.0 30.0 42.0 58.8 71.8 80.4 84.6 82.1 72.9 61.7 43.6 28.6 56.7
Highest Mean Max. Temperature (F) 35.5 42.1 54.0 68.3 81.4 87.4 90.0 88.1 79.2 71.9 49.9 37.8 60.4
Year Highest Occurred 1990 1987 1968 1987 1977 1988 1980 1983 1978 1963 1975 1979 1987
Lowest Mean Max. Temperature (F) 12.2 23.3 29.1 48.6 64.9 74.8 76.6 76.9 63.9 55.3 36.7 15.5 51.9
Year Lowest Occurred 1979 1989 1965 1975 1973 1969 1972 1972 1965 1972 1985 1983 1972
Mean Temperature (F) 12.9 18.5 31.4 46.4 58.2 67.2 71.8 69.0 60.3 49.4 34.3 19.2 44.9
Highest Mean Temperature (F) 24.6 29.9 39.7 53.6 66.7 71.8 76.2 74.8 66.7 58.1 39.5 28.8 48.7
Year Highest Occurred 1990 1987 1981 1977 1977 1971 1983 1983 1978 1963 1990 1965 1987
Lowest Mean Temperature (F) 0.7 9.6 19.4 38.5 52.3 61.2 66.2 64.8 54.5 42.0 27.7 5.0 41.0
Year Lowest Occurred 1977 1989 1965 1975 1967 1969 1972 1964 1965 1988 1976 1983 1972
Mean Min. Temperature (F) 1.8 6.9 20.8 34.0 44.5 54.0 58.9 56.0 47.7 37.0 25.0 9.7 33.0
Highest Mean Min. Temperature (F) 13.7 19.1 30.4 42.5 52.1 59.1 64.0 61.7 54.2 44.3 30.5 21.2 37.8
Year Highest Occurred 1990 1983 1977 1981 1982 1981 1981 1981 1978 1963 1990 1965 1981
Lowest Mean Min. Temperature (F) -11.3 -4.1 9.6 28.4 35.8 47.6 53.1 49.5 42.4 27.8 16.6 -5.6 29.5
Year Lowest Occurred 1977 1989 1965 1975 1966 1969 1971 1964 1974 1988 1976 1983 1989
Mean Precipitation (in.) 0.93 0.70 1.90 2.82 3.41 4.05 4.63 3.98 3.83 2.56 1.69 1.06 31.56
Highest Precipitation (in.) 4.39 2.39 3.87 6.04 6.37 9.79 13.11 9.70 10.06 6.30 5.38 2.89 43.62
Year Highest Occurred 1967 1981 1976 1990 1982 1975 1978 1981 1986 1966 1975 1982 1973
Lowest Precipitation (in.) 0.10 0.00 0.53 0.33 1.26 0.90 1.13 0.45 0.63 0.19 0.00 0.14 20.28
Year Lowest Occurred 1981 1987 1968 1969 1989 1964 1988 1969 1979 1976 1976 1967 1976
Heating Degree Days (F) 1615. 1302. 1042. 564. 258. 49. 18. 29. 164. 484. 921. 1420. 7866.
Cooling Degree Days (F) 0. 0. 0. 6. 47. 115. 229. 153. 23. 0. 0. 0. 573.

Western Regional Climate Center, wrcc@dri.edu