date! ,

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 36.7 36.9 42.4 50.5 58.9 67.8 73.9 74.0 68.4 59.7 50.3 41.3 55.1
Highest Mean Max. Temperature (F) 42.2 43.1 46.1 55.1 63.1 70.1 77.1 76.6 73.2 64.3 54.9 47.5 56.7
Year Highest Occurred 1990 1976 1986 1976 1964 1981 1983 1984 1961 1963 1975 1984 1990
Lowest Mean Max. Temperature (F) 29.3 29.2 36.9 46.5 52.7 63.7 70.8 69.8 64.4 56.5 45.8 31.5 53.0
Year Lowest Occurred 1970 1979 1967 1972 1967 1982 1969 1964 1963 1981 1967 1989 1967
Mean Temperature (F) 30.4 30.8 36.7 44.4 52.6 61.2 67.3 67.4 62.2 53.7 44.7 35.3 48.9
Highest Mean Temperature (F) 36.6 37.2 40.5 47.9 55.8 63.7 70.0 70.2 67.3 58.3 49.3 40.9 50.9
Year Highest Occurred 1990 1984 1973 1976 1979 1981 1983 1988 1961 1971 1975 1982 1990
Lowest Mean Temperature (F) 22.9 23.6 31.8 40.3 46.4 58.5 63.5 62.6 58.2 50.4 40.1 25.0 47.3
Year Lowest Occurred 1970 1979 1967 1972 1967 1982 1962 1964 1963 1974 1976 1989 1967
Mean Min. Temperature (F) 24.0 24.7 30.9 38.3 46.2 54.6 60.7 60.7 56.0 47.6 39.1 29.3 42.7
Highest Mean Min. Temperature (F) 31.0 31.8 35.4 41.1 50.0 57.4 62.9 64.2 61.3 52.7 43.6 35.5 45.0
Year Highest Occurred 1990 1984 1973 1981 1979 1976 1983 1988 1961 1971 1975 1982 1990
Lowest Mean Min. Temperature (F) 15.9 17.9 26.7 34.0 40.1 52.5 55.8 55.3 52.0 43.8 33.7 18.4 40.7
Year Lowest Occurred 1981 1979 1967 1972 1967 1965 1962 1964 1963 1974 1976 1989 1962
Mean Precipitation (in.) 3.74 3.93 3.80 3.76 3.82 3.20 3.18 3.21 3.66 4.02 4.26 4.51 45.09
Highest Precipitation (in.) 6.91 7.39 9.84 7.64 9.20 7.30 9.93 7.80 10.84 7.85 8.13 9.29 56.76
Year Highest Occurred 1987 1969 1983 1983 1967 1977 1986 1985 1972 1962 1988 1969 1972
Lowest Precipitation (in.) 1.42 1.21 0.91 1.24 0.76 0.32 0.73 0.94 0.47 1.51 1.06 1.35 25.39
Year Lowest Occurred 1970 1980 1962 1966 1964 1971 1968 1990 1971 1965 1984 1988 1965
Heating Degree Days (F) 1073. 958. 877. 618. 384. 119. 14. 26. 109. 350. 609. 921. 6058.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 85. 100. 25. 0. 0. 0. 210.

Western Regional Climate Center, wrcc@dri.edu