date! ,

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 22.9 29.8 41.4 57.2 69.7 79.1 83.0 80.6 71.3 60.2 41.5 27.3 55.3
Highest Mean Max. Temperature (F) 33.5 40.8 51.0 66.5 79.1 86.1 88.8 86.6 78.8 66.4 53.2 36.0 88.8
Year Highest Occurred 1990 1998 2000 1987 1977 1988 1980 1983 1998 1975 1999 1998 1980
Lowest Mean Max. Temperature (F) 10.2 21.3 31.4 46.8 62.6 74.3 75.4 75.4 63.6 54.2 33.5 13.6 10.2
Year Lowest Occurred 1979 1989 1975 1975 1973 1982 1972 1972 1993 1972 1991 1983 1979
Mean Temperature (F) 12.1 18.5 30.9 45.4 56.9 66.9 71.0 68.7 59.1 47.9 32.1 18.1 44.0
Highest Mean Temperature (F) 22.6 32.1 38.5 52.2 65.1 74.2 75.4 73.8 65.0 53.9 39.7 27.2 75.4
Year Highest Occurred 1992 1998 2000 1977 1977 1991 1983 1983 1978 1973 1999 1997 1983
Lowest Mean Temperature (F) -1.4 7.1 20.9 37.2 50.3 61.8 65.4 64.5 53.7 40.6 25.2 3.0 -1.4
Year Lowest Occurred 1977 1989 1975 1975 1997 1982 1972 1986 1993 1988 1991 1983 1977
Mean Min. Temperature (F) 1.3 7.2 20.3 33.5 44.1 54.6 59.0 56.8 46.8 35.6 22.7 8.9 32.6
Highest Mean Min. Temperature (F) 14.6 23.4 28.3 41.6 51.9 63.4 63.6 62.8 52.6 41.7 28.2 18.7 63.6
Year Highest Occurred 1992 1998 1977 1981 1991 1991 1981 1995 1978 1973 1990 1997 1981
Lowest Mean Min. Temperature (F) -13.3 -7.2 10.4 27.5 35.1 49.3 52.7 51.6 40.8 26.2 14.3 -7.7 -13.3
Year Lowest Occurred 1977 1989 1975 1975 1997 1982 1971 1971 1974 1988 1976 1983 1977
Mean Precipitation (in.) 0.95 0.71 1.85 3.20 3.35 4.22 4.84 4.32 3.67 2.15 2.14 1.00 32.40
Highest Precipitation (in.) 2.33 2.39 4.09 7.16 6.37 9.98 13.11 9.70 10.06 5.74 8.46 2.89 13.11
Year Highest Occurred 1988 1981 1998 1999 1982 1998 1978 1981 1986 1979 1991 1982 1978
Lowest Precipitation (in.) 0.10 0.00 0.15 0.68 0.66 1.40 1.13 0.50 0.63 0.19 0.00 0.23 0.00
Year Lowest Occurred 1981 1987 1994 1987 1992 1985 1988 1971 1979 1976 1976 1997 1987
Heating Degree Days (F) 1641. 1303. 1058. 594. 293. 65. 22. 36. 203. 531. 988. 1454. 8188.
Cooling Degree Days (F) 0. 0. 0. 4. 42. 120. 208. 151. 25. 1. 0. 0. 551.

Western Regional Climate Center, wrcc@dri.edu