date! ,

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 18.7 24.2 34.5 47.3 61.4 69.1 75.5 73.2 64.0 52.1 37.2 23.7 48.4
Highest Mean Max. Temperature (F) 28.3 33.9 41.8 54.9 68.8 75.5 82.2 78.9 68.9 58.8 45.2 31.9 82.2
Year Highest Occurred 1990 1998 2000 1987 1988 1988 1988 1991 1998 1973 1975 1997 1988
Lowest Mean Max. Temperature (F) 8.3 15.3 28.8 40.2 52.6 64.4 67.1 68.9 58.4 46.2 27.8 13.4 8.3
Year Lowest Occurred 1994 1979 1984 1996 1997 1982 1992 1977 1993 1987 1995 1983 1994
Mean Temperature (F) 7.8 12.8 24.5 37.1 49.5 57.4 63.4 62.5 53.7 43.0 28.8 13.8 37.9
Highest Mean Temperature (F) 17.2 26.2 33.0 43.1 54.5 61.3 67.4 67.3 59.0 49.2 36.4 24.3 67.4
Year Highest Occurred 1990 1998 2000 1987 1977 1976 1983 1983 1998 1973 1999 1997 1983
Lowest Mean Temperature (F) -2.8 2.7 18.0 31.5 43.5 52.2 56.9 56.9 48.6 38.5 20.8 2.0 -2.8
Year Lowest Occurred 1994 1994 1996 1975 1997 1982 1992 1977 1993 1988 1995 1983 1994
Mean Min. Temperature (F) -3.1 1.4 14.5 26.9 37.6 45.6 51.3 51.7 43.3 33.8 20.4 3.8 27.3
Highest Mean Min. Temperature (F) 7.6 18.5 24.2 32.8 42.4 49.1 56.0 56.8 49.0 39.5 27.9 16.6 56.8
Year Highest Occurred 1998 1998 2000 1986 1999 1998 1999 1983 1998 1973 1999 1997 1983
Lowest Mean Min. Temperature (F) -15.5 -10.9 6.2 21.4 33.1 40.0 46.6 44.8 38.2 29.0 12.1 -11.5 -15.5
Year Lowest Occurred 1982 1994 1975 1975 1996 1982 1992 1977 1974 1976 1976 1976 1982
Mean Precipitation (in.) 1.33 0.80 1.55 2.22 2.86 3.19 3.45 3.10 3.68 3.25 2.37 1.56 29.36
Highest Precipitation (in.) 3.76 2.23 3.27 3.98 5.61 5.56 6.75 6.33 12.21 7.31 5.64 3.16 12.21
Year Highest Occurred 1996 1996 1979 1994 1971 2000 1993 1977 1977 1971 1998 1977 1977
Lowest Precipitation (in.) 0.29 0.07 0.16 0.91 0.73 0.39 1.30 0.62 1.00 0.62 0.29 0.55 0.07
Year Lowest Occurred 1985 1993 1995 1988 1976 1995 1998 1976 1976 1976 1976 1997 1993
Heating Degree Days (F) 1775. 1462. 1256. 838. 484. 238. 101. 130. 343. 683. 1087. 1588. 9985.
Cooling Degree Days (F) 0. 0. 0. 0. 2. 8. 51. 51. 2. 0. 0. 0. 114.

Western Regional Climate Center, wrcc@dri.edu