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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) 56.3 60.0 60.8 62.1 62.7 64.1 64.6 65.6 68.7 68.7 62.7 56.4 62.7
Highest Mean Max. Temperature (F) 60.3 67.0 67.7 69.1 70.8 69.5 69.6 68.2 74.4 74.9 69.1 60.7 65.2
Year Highest Occurred 1976 1988 1988 1989 1984 1981 1988 1976 1984 1988 1986 1976 1988
Lowest Mean Max. Temperature (F) 52.9 53.8 57.4 55.3 58.3 60.7 60.5 61.8 60.8 62.6 58.8 51.6 61.2
Year Lowest Occurred 1969 1969 1973 1967 1964 1982 1962 1973 1986 1984 1985 1972 1971
Mean Temperature (F) 51.1 54.4 54.9 56.0 56.6 58.4 59.1 60.1 62.3 62.0 57.2 51.7 57.0
Highest Mean Temperature (F) 55.0 58.4 59.0 60.7 61.1 62.2 63.5 62.5 66.3 65.9 60.7 55.8 58.4
Year Highest Occurred 1978 1963 1984 1989 1984 1981 1988 1976 1979 1987 1986 1969 1988
Lowest Mean Temperature (F) 48.2 50.1 52.1 50.8 53.4 56.2 56.0 57.1 57.2 57.8 53.7 47.2 55.6
Year Lowest Occurred 1985 1969 1985 1967 1964 1965 1962 1973 1986 1971 1985 1972 1971
Mean Min. Temperature (F) 45.8 48.7 49.0 49.8 50.5 52.6 53.5 54.6 55.9 55.2 51.6 47.0 51.2
Highest Mean Min. Temperature (F) 51.1 54.1 53.9 53.4 53.5 54.9 57.3 57.8 59.1 58.5 54.9 52.3 52.7
Year Highest Occurred 1978 1986 1978 1990 1987 1981 1988 1983 1979 1987 1967 1983 1979
Lowest Mean Min. Temperature (F) 41.7 44.8 45.0 46.2 48.4 50.9 51.4 51.9 53.2 51.0 48.5 41.5 49.9
Year Lowest Occurred 1989 1990 1985 1967 1964 1984 1962 1970 1962 1971 1985 1990 1971
Mean Precipitation (in.) 4.06 2.95 3.07 1.29 0.25 0.15 0.04 0.07 0.26 1.26 3.21 3.10 19.71
Highest Precipitation (in.) 9.49 8.29 9.04 4.90 2.38 1.42 0.62 0.78 1.32 5.51 8.20 7.72 43.75
Year Highest Occurred 1967 1986 1983 1967 1990 1967 1974 1976 1986 1962 1983 1983 1983
Lowest Precipitation (in.) 0.31 0.19 0.07 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 8.73
Year Lowest Occurred 1976 1964 1988 1964 1982 1986 1990 1988 1988 1980 1980 1989 1976
Heating Degree Days (F) 431. 297. 313. 275. 260. 198. 187. 156. 116. 123. 237. 412. 3005.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 0. 0. 35. 30. 0. 0. 65.

Western Regional Climate Center, wrcc@dri.edu