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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) 21.9 27.8 40.2 55.8 67.7 77.4 82.0 78.9 70.1 58.7 41.7 26.4 54.1
Highest Mean Max. Temperature (F) 33.6 38.4 52.3 65.9 77.0 85.8 88.4 85.6 76.4 67.8 49.0 35.0 57.7
Year Highest Occurred 1990 1987 1968 1977 1977 1988 1988 1988 1978 1963 1975 1965 1987
Lowest Mean Max. Temperature (F) 8.3 18.0 28.7 45.6 61.8 70.0 75.6 73.6 61.8 53.9 34.0 14.9 50.3
Year Lowest Occurred 1979 1979 1965 1979 1983 1969 1962 1963 1965 1987 1985 1983 1979
Mean Temperature (F) 11.7 17.0 30.0 44.5 56.3 65.9 70.5 67.7 58.5 47.3 32.2 17.5 43.3
Highest Mean Temperature (F) 25.7 29.3 39.7 52.1 63.7 71.6 75.2 73.9 62.9 54.7 38.3 26.2 47.9
Year Highest Occurred 1990 1987 1973 1977 1977 1988 1988 1983 1978 1963 1990 1965 1987
Lowest Mean Temperature (F) -0.8 6.8 18.3 37.4 49.2 59.8 65.1 62.5 51.6 42.3 25.6 5.6 40.3
Year Lowest Occurred 1979 1979 1965 1961 1966 1969 1962 1963 1965 1988 1985 1983 1965
Mean Min. Temperature (F) 1.4 6.2 19.8 33.2 44.8 54.3 59.0 56.4 46.8 35.8 22.7 8.5 32.4
Highest Mean Min. Temperature (F) 17.7 20.1 29.7 40.0 51.5 59.6 63.2 62.6 52.4 42.7 30.0 18.7 37.9
Year Highest Occurred 1990 1987 1973 1985 1982 1971 1983 1983 1990 1971 1987 1987 1987
Lowest Mean Min. Temperature (F) -11.8 -4.4 7.8 27.3 35.3 49.6 54.3 51.0 40.9 29.2 13.6 -3.7 28.8
Year Lowest Occurred 1977 1979 1965 1975 1966 1969 1965 1964 1975 1964 1976 1983 1965
Mean Precipitation (in.) 1.07 1.04 2.21 3.36 3.73 4.29 4.31 4.17 4.15 2.57 2.06 1.52 34.48
Highest Precipitation (in.) 3.92 3.58 4.70 7.57 6.56 10.31 10.76 10.62 11.80 4.44 4.53 4.53 47.30
Year Highest Occurred 1967 1971 1961 1973 1973 1984 1987 1980 1965 1984 1975 1984 1965
Lowest Precipitation (in.) 0.13 0.00 0.35 0.72 1.16 1.26 0.32 0.73 0.27 0.28 0.04 0.29 21.07
Year Lowest Occurred 1981 1990 1978 1966 1989 1963 1967 1970 1979 1964 1976 1962 1989
Heating Degree Days (F) 1652. 1344. 1085. 615. 296. 71. 19. 50. 212. 549. 984. 1473. 8350.
Cooling Degree Days (F) 0. 0. 0. 0. 26. 98. 190. 134. 17. 0. 0. 0. 465.

Western Regional Climate Center, wrcc@dri.edu