date! ,

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 18.7 24.0 35.5 50.6 64.3 72.9 77.9 74.8 65.0 53.9 37.1 23.1 49.8
Highest Mean Max. Temperature (F) 29.7 35.0 43.6 60.0 75.8 78.3 82.6 79.9 69.4 66.8 44.6 30.9 54.1
Year Highest Occurred 1990 1987 1968 1987 1977 1987 1966 1969 1978 1963 1981 1979 1987
Lowest Mean Max. Temperature (F) 8.5 16.3 27.6 43.9 56.8 64.3 73.7 68.6 57.8 46.3 31.1 13.7 47.3
Year Lowest Occurred 1963 1963 1965 1975 1973 1969 1978 1977 1965 1987 1989 1989 1972
Mean Temperature (F) 8.7 12.8 24.7 39.6 52.2 61.0 66.3 63.6 54.8 44.5 29.7 14.8 39.4
Highest Mean Temperature (F) 18.8 24.5 34.1 46.2 62.1 65.6 70.6 68.1 58.8 56.1 36.1 23.1 43.9
Year Highest Occurred 1990 1984 1973 1987 1977 1971 1966 1969 1978 1963 1981 1987 1987
Lowest Mean Temperature (F) -1.2 4.8 15.9 32.9 46.5 54.5 63.2 56.6 49.3 37.4 22.9 5.0 36.9
Year Lowest Occurred 1977 1989 1965 1975 1983 1982 1971 1977 1974 1980 1976 1989 1979
Mean Min. Temperature (F) -1.3 1.6 13.9 28.6 40.0 49.1 54.6 52.3 44.5 35.1 22.2 6.4 28.9
Highest Mean Min. Temperature (F) 8.3 14.4 25.5 34.7 48.3 52.9 58.6 56.4 48.7 45.3 28.9 16.5 33.6
Year Highest Occurred 1987 1983 1973 1986 1977 1971 1966 1988 1968 1963 1963 1987 1987
Lowest Mean Min. Temperature (F) -12.6 -7.8 3.5 21.9 31.6 42.4 51.1 44.5 39.1 26.3 13.6 -4.9 25.1
Year Lowest Occurred 1977 1989 1984 1975 1981 1982 1980 1977 1976 1980 1976 1983 1980
Mean Precipitation (in.) 1.87 1.26 1.97 2.12 3.23 4.02 3.55 3.95 3.92 3.39 2.80 2.21 34.29
Highest Precipitation (in.) 4.23 3.21 4.50 4.01 6.88 7.34 9.18 7.09 7.42 5.91 5.74 5.08 46.08
Year Highest Occurred 1971 1971 1976 1985 1970 1967 1982 1972 1985 1979 1975 1968 1982
Lowest Precipitation (in.) 0.63 0.33 0.66 0.48 0.65 0.85 0.99 0.67 1.17 1.32 0.64 0.27 26.02
Year Lowest Occurred 1984 1987 1974 1988 1986 1970 1976 1970 1976 1972 1981 1967 1963
Heating Degree Days (F) 1745. 1462. 1249. 762. 416. 157. 51. 107. 310. 636. 1059. 1556. 9510.
Cooling Degree Days (F) 0. 0. 0. 0. 19. 37. 92. 63. 0. 0. 0. 0. 211.

Western Regional Climate Center, wrcc@dri.edu