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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) 23.8 28.5 39.6 54.6 68.0 77.1 81.9 79.0 70.3 58.1 42.7 28.6 54.4
Highest Mean Max. Temperature (F) 35.3 39.1 48.3 61.8 77.0 84.6 87.7 85.0 73.3 70.4 49.8 36.5 58.7
Year Highest Occurred 1990 1987 1968 1987 1988 1988 1988 1988 1990 1963 1975 1979 1987
Lowest Mean Max. Temperature (F) 13.4 20.8 32.1 47.7 60.2 67.8 77.3 75.7 65.7 52.6 36.4 18.5 51.4
Year Lowest Occurred 1977 1979 1965 1975 1983 1969 1978 1977 1975 1988 1985 1983 1972
Mean Temperature (F) 15.5 19.9 31.1 44.8 57.2 66.6 71.9 69.4 60.9 49.4 35.5 21.2 45.3
Highest Mean Temperature (F) 26.9 29.7 39.3 50.3 65.1 71.3 76.2 75.3 64.0 59.9 41.2 29.7 49.2
Year Highest Occurred 1990 1987 1973 1987 1977 1987 1988 1988 1978 1963 1975 1965 1987
Lowest Mean Temperature (F) 4.6 11.4 24.8 39.1 51.0 59.5 68.2 65.5 56.3 44.2 27.9 10.1 42.7
Year Lowest Occurred 1977 1979 1965 1975 1967 1969 1962 1967 1974 1988 1976 1985 1972
Mean Min. Temperature (F) 7.2 11.2 22.6 35.0 46.3 56.2 62.0 59.7 51.5 40.7 28.2 13.8 36.2
Highest Mean Min. Temperature (F) 18.5 22.7 31.3 40.1 53.3 60.3 67.0 65.6 55.1 49.3 32.8 23.6 39.8
Year Highest Occurred 1990 1984 1973 1985 1977 1987 1983 1988 1978 1963 1963 1965 1987
Lowest Mean Min. Temperature (F) -4.3 1.9 16.3 30.5 40.4 50.7 58.4 54.7 45.9 35.6 19.1 1.5 33.9
Year Lowest Occurred 1977 1979 1972 1975 1967 1982 1965 1967 1974 1987 1976 1985 1976
Mean Precipitation (in.) 1.12 1.08 2.17 2.78 3.19 3.64 3.21 3.74 3.66 2.45 2.17 1.54 30.75
Highest Precipitation (in.) 2.62 3.66 4.70 5.54 7.83 9.07 7.29 7.70 9.15 6.41 5.87 3.68 40.98
Year Highest Occurred 1967 1981 1979 1981 1973 1990 1961 1975 1986 1967 1985 1982 1961
Lowest Precipitation (in.) 0.04 0.04 0.14 0.80 0.22 0.64 1.69 0.50 0.32 0.44 0.04 0.34 20.33
Year Lowest Occurred 1981 1969 1978 1989 1988 1976 1981 1976 1967 1975 1976 1989 1976
Heating Degree Days (F) 1535. 1263. 1051. 606. 278. 60. 8. 21. 139. 489. 885. 1358. 7693.
Cooling Degree Days (F) 0. 0. 0. 0. 36. 108. 222. 157. 16. 0. 0. 0. 539.

Western Regional Climate Center, wrcc@dri.edu