date! ,

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 18.0 25.0 36.9 52.9 66.9 75.1 80.2 77.2 67.1 55.4 37.0 22.0 51.1
Highest Mean Max. Temperature (F) 29.5 37.5 46.8 66.8 75.7 83.7 87.2 83.2 73.2 67.7 44.0 29.6 57.0
Year Highest Occurred 1990 1987 1968 1987 1977 1988 1988 1983 1976 1963 1963 1979 1987
Lowest Mean Max. Temperature (F) 8.8 15.5 27.8 43.4 60.5 68.4 75.2 71.5 57.0 49.9 29.4 11.0 47.7
Year Lowest Occurred 1982 1989 1965 1975 1979 1969 1971 1977 1965 1988 1985 1983 1972
Mean Temperature (F) 6.5 12.7 25.6 40.6 53.0 61.3 66.8 64.3 55.1 44.5 28.3 12.4 39.3
Highest Mean Temperature (F) 19.9 26.3 34.8 48.5 60.5 66.4 70.6 70.0 58.7 53.2 34.5 21.1 44.5
Year Highest Occurred 1990 1987 1973 1987 1977 1988 1988 1983 1978 1963 1981 1965 1987
Lowest Mean Temperature (F) -4.3 3.3 14.4 33.7 47.1 55.2 62.2 59.4 48.2 37.0 20.6 -0.3 36.2
Year Lowest Occurred 1982 1989 1965 1975 1967 1969 1971 1977 1965 1976 1985 1983 1972
Mean Min. Temperature (F) -5.1 0.3 14.2 28.2 39.0 47.4 53.4 51.3 43.1 33.5 19.5 2.7 27.3
Highest Mean Min. Temperature (F) 10.3 15.0 25.5 32.7 45.2 50.9 58.0 56.8 47.4 38.9 25.5 12.9 31.8
Year Highest Occurred 1990 1987 1973 1977 1977 1990 1983 1983 1978 1971 1981 1987 1987
Lowest Mean Min. Temperature (F) -17.3 -11.0 1.0 24.0 32.9 41.9 49.1 47.2 37.6 23.5 9.2 -11.6 24.6
Year Lowest Occurred 1982 1967 1965 1975 1967 1969 1971 1977 1974 1976 1976 1983 1972
Mean Precipitation (in.) 0.89 0.58 1.45 2.20 3.17 4.13 3.53 3.59 3.43 2.52 1.48 1.03 28.00
Highest Precipitation (in.) 2.71 1.99 3.42 5.39 7.19 7.42 8.02 8.21 8.94 7.48 3.68 2.17 38.66
Year Highest Occurred 1975 1971 1979 1968 1977 1986 1972 1972 1986 1970 1970 1968 1986
Lowest Precipitation (in.) 0.12 0.11 0.26 0.26 0.89 0.85 1.21 0.38 0.51 0.35 0.24 0.15 15.96
Year Lowest Occurred 1961 1987 1969 1988 1976 1961 1964 1969 1976 1964 1976 1979 1976
Heating Degree Days (F) 1814. 1464. 1221. 732. 382. 140. 49. 93. 300. 636. 1101. 1631. 9563.
Cooling Degree Days (F) 0. 0. 0. 0. 10. 29. 105. 71. 0. 0. 0. 0. 215.

Western Regional Climate Center, wrcc@dri.edu