date! ,

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 24.0 30.0 41.9 57.9 70.6 79.4 83.9 81.0 71.8 60.2 43.2 28.4 56.0
Highest Mean Max. Temperature (F) 36.2 39.9 51.9 67.3 79.4 85.5 88.2 86.3 78.8 70.7 49.1 36.6 59.4
Year Highest Occurred 1990 1987 1968 1977 1977 1988 1964 1983 1978 1963 1975 1965 1987
Lowest Mean Max. Temperature (F) 12.2 22.7 31.7 50.7 64.2 71.4 79.5 76.6 65.6 54.9 35.2 16.5 53.5
Year Lowest Occurred 1977 1979 1965 1975 1983 1969 1962 1986 1965 1987 1985 1983 1972
Mean Temperature (F) 14.3 19.6 32.4 47.3 59.3 68.3 72.9 70.2 61.4 50.2 35.1 20.3 45.9
Highest Mean Temperature (F) 27.3 30.1 41.2 55.0 67.3 72.7 76.2 74.9 66.9 60.5 40.7 30.1 50.0
Year Highest Occurred 1990 1987 1973 1977 1977 1971 1964 1988 1978 1963 1963 1965 1987
Lowest Mean Temperature (F) 2.3 9.0 23.4 41.1 54.3 61.7 69.1 66.9 57.3 43.6 28.6 7.2 43.6
Year Lowest Occurred 1979 1978 1965 1975 1983 1969 1971 1986 1984 1990 1976 1983 1979
Mean Min. Temperature (F) 4.5 9.0 22.8 36.7 48.1 57.2 61.9 59.3 50.8 40.2 27.0 12.1 35.8
Highest Mean Min. Temperature (F) 18.4 20.2 32.8 42.6 55.2 62.1 65.5 64.5 55.0 50.2 32.7 23.5 40.6
Year Highest Occurred 1990 1987 1973 1977 1962 1971 1987 1988 1978 1963 1963 1965 1987
Lowest Mean Min. Temperature (F) -8.3 -5.2 14.3 31.5 42.9 51.8 56.3 56.3 42.7 30.4 19.2 -2.2 32.5
Year Lowest Occurred 1979 1978 1978 1975 1984 1982 1984 1967 1984 1990 1976 1983 1978
Mean Precipitation (in.) 0.95 0.87 2.11 2.94 3.78 3.96 4.14 4.13 4.26 2.42 1.81 1.22 32.59
Highest Precipitation (in.) 2.71 3.15 4.00 6.99 7.05 9.93 12.64 9.31 13.13 5.62 4.86 3.17 44.75
Year Highest Occurred 1967 1981 1976 1968 1970 1968 1978 1980 1980 1982 1983 1982 1968
Lowest Precipitation (in.) 0.08 0.00 0.40 0.88 1.09 1.00 0.55 0.67 0.96 0.34 0.00 0.30 18.60
Year Lowest Occurred 1962 1987 1978 1966 1985 1989 1967 1969 1976 1975 1976 1962 1976
Heating Degree Days (F) 1572. 1271. 1011. 531. 223. 34. 6. 10. 131. 467. 897. 1386. 7539.
Cooling Degree Days (F) 0. 0. 0. 0. 47. 133. 250. 171. 23. 8. 0. 0. 632.
Western Regional Climate Center, wrcc@dri.edu