date! ,

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 22.6 29.8 41.9 57.4 70.4 79.7 85.1 82.8 73.5 60.1 40.2 26.8 55.9
Highest Mean Max. Temperature (F) 36.8 41.5 53.1 67.9 77.9 88.3 93.4 91.7 80.7 66.3 55.5 37.5 93.4
Year Highest Occurred 1990 1987 2000 1981 1977 1988 1976 1976 1998 1974 1999 1979 1976
Lowest Mean Max. Temperature (F) 9.2 16.5 34.1 47.6 62.7 71.3 74.3 74.4 66.2 55.1 26.3 8.1 8.1
Year Lowest Occurred 1979 1989 1993 1975 1996 1993 1992 1992 1993 1995 1985 1983 1983
Mean Temperature (F) 12.6 19.4 31.3 44.8 57.7 67.2 72.5 69.9 59.9 47.5 30.4 17.3 44.2
Highest Mean Temperature (F) 26.6 31.5 41.3 52.5 64.9 74.8 78.1 75.3 66.3 51.5 42.6 26.9 78.1
Year Highest Occurred 1990 1998 2000 1981 1977 1988 1974 1976 1998 1975 1999 1999 1974
Lowest Mean Temperature (F) -1.4 5.4 23.8 38.3 52.2 61.3 64.1 63.5 53.7 42.5 18.4 -1.0 -1.4
Year Lowest Occurred 1978 1989 1975 1995 1997 1993 1992 1992 1993 1976 1985 1983 1978
Mean Min. Temperature (F) 2.5 8.9 20.6 32.1 44.9 54.6 59.9 56.9 46.2 34.9 20.6 7.7 32.5
Highest Mean Min. Temperature (F) 16.3 23.5 29.4 37.1 51.9 61.3 64.2 61.9 51.9 42.1 29.6 18.9 64.2
Year Highest Occurred 1990 1998 2000 1981 1977 1988 1999 1995 1998 1984 1999 1997 1999
Lowest Mean Min. Temperature (F) -12.1 -6.3 12.5 27.5 39.9 48.0 53.9 51.5 40.5 27.9 10.4 -10.2 -12.1
Year Lowest Occurred 1978 1979 1975 1990 1983 1982 1992 1986 1984 1987 1985 1983 1978
Mean Precipitation (in.) 0.54 0.63 1.57 2.45 3.03 3.64 3.13 2.90 2.25 1.90 1.20 0.49 23.73
Highest Precipitation (in.) 1.85 1.94 4.63 7.31 7.45 8.63 8.02 5.90 6.10 6.11 3.63 1.98 8.63
Year Highest Occurred 1988 1977 1995 1986 1972 1993 1993 1992 1986 1998 1983 1987 1993
Lowest Precipitation (in.) 0.00 0.00 0.39 0.38 0.43 0.80 0.50 0.78 0.11 0.00 0.02 0.00 0.00
Year Lowest Occurred 1990 1983 1978 1987 1976 1997 1975 1972 1974 1988 1984 1991 1990
Heating Degree Days (F) 1627. 1278. 1046. 610. 260. 63. 24. 37. 194. 544. 1039. 1482. 8204.
Cooling Degree Days (F) 0. 0. 0. 2. 31. 127. 256. 187. 40. 0. 0. 0. 643.

Western Regional Climate Center, wrcc@dri.edu