date! ,

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 26.6 38.5 54.2 68.0 77.6 81.1 78.9 70.9 58.4 40.2 25.4 53.4
Highest Mean Max. Temperature (F) 33.7 39.0 48.5 64.4 77.3 87.5 86.9 86.9 77.2 64.5 50.9 34.3 87.5
Year Highest Occurred 1990 1987 2000 1987 1988 1988 1988 1983 1998 1975 1999 1998 1988
Lowest Mean Max. Temperature (F) 8.9 17.1 29.7 44.8 60.3 72.3 72.0 73.5 63.0 53.5 29.6 11.9 8.9
Year Lowest Occurred 1977 1979 1975 1975 1997 1993 1992 1992 1993 1972 1996 1983 1977
Mean Temperature (F) 11.7 17.7 29.3 43.3 56.3 66.6 70.1 67.7 59.0 47.1 31.7 17.5 43.2
Highest Mean Temperature (F) 24.9 29.1 38.1 50.7 64.7 72.4 74.5 73.7 64.9 53.9 39.6 25.3 74.5
Year Highest Occurred 1990 1987 1973 1977 1977 1988 1983 1983 1978 1971 1999 1982 1983
Lowest Mean Temperature (F) -0.9 6.9 20.2 36.5 48.1 62.1 62.7 62.3 52.8 42.1 22.6 3.3 -0.9
Year Lowest Occurred 1977 1979 1975 1975 1997 1982 1992 1992 1993 1988 1996 1983 1977
Mean Min. Temperature (F) 2.8 8.8 20.1 32.3 44.5 55.5 59.1 56.4 47.1 35.7 23.1 9.6 32.9
Highest Mean Min. Temperature (F) 16.1 21.7 29.7 38.8 52.2 61.0 62.7 63.0 52.7 44.0 28.4 17.9 63.0
Year Highest Occurred 1990 1998 1973 1977 1977 1991 1983 1995 1978 1971 1987 1997 1995
Lowest Mean Min. Temperature (F) -10.8 -3.3 10.7 26.1 35.9 49.5 53.4 51.1 42.2 29.1 15.5 -5.3 -10.8
Year Lowest Occurred 1977 1979 1975 1997 1997 1982 1992 1992 1974 1988 1986 1983 1977
Mean Precipitation (in.) 1.03 0.75 1.86 3.37 4.27 4.37 4.82 5.07 3.50 2.43 2.15 1.03 34.65
Highest Precipitation (in.) 2.39 3.46 3.77 8.16 9.62 10.40 13.48 11.43 8.57 4.89 6.02 2.96 13.48
Year Highest Occurred 1996 1971 1990 1999 1982 2000 1999 1980 1986 1998 1991 1982 1999
Lowest Precipitation (in.) 0.00 0.01 0.12 0.82 1.55 1.27 0.63 0.26 0.46 0.43 0.09 0.16 0.00
Year Lowest Occurred 1984 1987 1994 2000 1985 1988 1975 1971 1975 1988 1976 1989 1984
Heating Degree Days (F) 1654. 1324. 1108. 654. 305. 62. 28. 53. 205. 557. 1000. 1473. 8423.
Cooling Degree Days (F) 0. 0. 0. 1. 35. 108. 186. 135. 25. 0. 0. 0. 490.

Western Regional Climate Center, wrcc@dri.edu