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NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 20.6 27.1 39.4 55.8 69.2 78.5 83.1 80.9 71.8 58.9 39.0 25.5 54.2
Highest Mean Max. Temperature (F) 36.5 42.7 51.4 66.2 78.3 87.8 88.4 87.7 79.8 65.3 54.5 35.2 88.4
Year Highest Occurred 1990 1987 2000 1987 1977 1988 1988 1983 1998 1973 1999 1999 1988
Lowest Mean Max. Temperature (F) 7.5 15.3 27.9 41.3 61.7 71.6 72.0 74.4 64.9 51.8 28.7 6.8 6.8
Year Lowest Occurred 1979 1978 1975 1975 1996 1993 1992 1992 1993 1976 1985 1983 1983
Mean Temperature (F) 11.2 18.0 30.2 44.6 57.7 67.1 71.6 69.3 59.3 46.6 30.0 16.5 43.5
Highest Mean Temperature (F) 25.2 30.2 39.1 52.6 66.6 75.3 76.4 75.6 65.6 53.4 40.4 26.2 76.4
Year Highest Occurred 1990 1998 2000 1981 1977 1988 1974 1983 1978 1973 1999 1979 1974
Lowest Mean Temperature (F) -0.9 6.3 19.3 36.3 51.2 61.0 62.8 63.7 53.3 39.0 20.9 -1.9 -1.9
Year Lowest Occurred 1979 1989 1975 1975 1997 1982 1992 1992 1984 1976 1996 1983 1983
Mean Min. Temperature (F) 1.7 8.8 21.0 33.3 46.2 55.7 60.1 57.6 46.7 34.2 21.0 7.4 32.8
Highest Mean Min. Temperature (F) 14.1 22.9 29.4 39.5 54.9 62.8 65.1 63.5 52.4 41.5 27.2 17.6 65.1
Year Highest Occurred 1992 1998 1973 1981 1977 1988 1974 1983 1978 1973 1983 1979 1974
Lowest Mean Min. Temperature (F) -10.1 -5.1 10.6 28.7 39.2 49.3 53.6 52.2 39.4 26.3 13.1 -10.6 -10.6
Year Lowest Occurred 1977 1989 1975 1996 1997 1982 1992 1986 1984 1976 1996 1983 1983
Mean Precipitation (in.) 0.55 0.51 1.72 2.41 3.32 3.93 3.31 3.10 2.76 2.22 1.52 0.60 25.95
Highest Precipitation (in.) 1.60 1.48 4.12 5.62 8.61 9.86 7.75 8.26 10.25 6.30 4.39 1.66 10.25
Year Highest Occurred 1975 1992 1977 1995 1993 1993 1989 1980 1986 1984 1983 1982 1986
Lowest Precipitation (in.) 0.00 0.05 0.29 0.34 0.25 1.31 0.99 0.70 0.41 0.03 0.04 0.01 0.00
Year Lowest Occurred 1974 1982 1994 1996 1976 1978 1988 1976 1990 1988 1999 1986 1974
Heating Degree Days (F) 1670. 1318. 1079. 616. 271. 66. 22. 43. 209. 571. 1051. 1506. 8422.
Cooling Degree Days (F) 0. 0. 0. 2. 44. 129. 226. 174. 36. 0. 0. 0. 611.

Western Regional Climate Center, wrcc@dri.edu