date! ,

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 24.3 29.4 41.3 55.5 68.0 77.3 80.8 78.4 70.9 59.8 43.0 29.6 54.9
Highest Mean Max. Temperature (F) 35.1 38.5 50.5 64.3 77.9 83.4 85.0 84.3 77.4 67.9 53.8 38.5 85.0
Year Highest Occurred 1990 1998 2000 1977 1977 1988 1988 1988 1998 1971 1999 1998 1988
Lowest Mean Max. Temperature (F) 12.6 19.5 34.3 48.1 61.5 72.2 76.2 74.2 63.9 53.6 35.4 17.6 12.6
Year Lowest Occurred 1977 1979 1984 1975 1983 1982 1992 1994 1993 1988 1996 1983 1977
Mean Temperature (F) 16.2 21.0 32.8 45.6 57.3 66.7 70.7 68.6 60.6 49.5 35.1 22.2 45.5
Highest Mean Temperature (F) 27.0 32.6 40.3 51.9 63.7 70.5 74.8 75.0 65.0 57.8 41.9 30.9 75.0
Year Highest Occurred 1990 1998 2000 1985 1977 1987 1999 1995 1998 1971 1999 1982 1995
Lowest Mean Temperature (F) 3.3 10.0 26.1 39.6 51.9 61.4 66.6 64.5 55.4 43.9 27.2 11.2 3.3
Year Lowest Occurred 1977 1979 1975 1975 1997 1982 1971 1992 1993 1988 1976 1983 1977
Mean Min. Temperature (F) 8.0 12.6 24.3 35.7 46.5 56.0 60.5 58.8 50.2 39.2 27.1 14.7 36.1
Highest Mean Min. Temperature (F) 19.0 26.6 32.2 42.3 52.5 59.6 65.3 66.2 54.3 47.6 31.9 24.3 66.2
Year Highest Occurred 1989 1998 1973 1985 1991 1995 1999 1995 1994 1971 1987 1982 1995
Lowest Mean Min. Temperature (F) -6.0 0.6 17.3 30.6 40.1 50.7 56.4 53.9 44.0 33.2 16.2 1.0 -6.0
Year Lowest Occurred 1977 1979 1996 1972 1971 1982 1971 1976 1976 1976 1976 1976 1977
Mean Precipitation (in.) 1.34 1.23 2.23 3.39 3.19 4.03 4.30 3.79 3.65 2.52 2.30 1.65 33.62
Highest Precipitation (in.) 3.28 3.18 6.59 7.57 7.02 8.24 8.45 9.76 15.05 6.11 6.11 3.95 15.05
Year Highest Occurred 1999 1971 1998 1999 1978 1990 1999 1995 1986 1995 1985 1971 1986
Lowest Precipitation (in.) 0.10 0.01 0.17 0.84 0.50 0.62 0.83 0.63 0.23 0.66 0.11 0.35 0.01
Year Lowest Occurred 1981 1995 1981 1997 1981 1987 1975 1991 1979 1975 1976 1993 1995
Heating Degree Days (F) 1515. 1232. 998. 583. 272. 52. 11. 41. 159. 483. 899. 1330. 7575.
Cooling Degree Days (F) 0. 0. 0. 1. 31. 102. 187. 152. 25. 2. 0. 0. 500.

Western Regional Climate Center, wrcc@dri.edu