date! ,

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 21.5 27.6 40.0 55.6 68.7 78.3 81.9 79.7 71.6 59.3 41.4 26.7 54.4
Highest Mean Max. Temperature (F) 34.3 37.6 50.6 63.9 77.9 86.4 86.9 86.8 78.6 65.6 52.3 36.2 86.9
Year Highest Occurred 1990 1987 2000 1977 1977 1988 1988 1983 1998 1975 1999 1998 1988
Lowest Mean Max. Temperature (F) 9.5 17.4 30.2 46.8 61.8 72.4 74.2 75.3 64.2 54.1 33.0 12.9 9.5
Year Lowest Occurred 1979 1979 1975 1975 1974 1982 1992 1992 1993 1972 1996 1983 1979
Mean Temperature (F) 12.2 18.5 31.0 44.8 57.3 66.9 70.8 68.5 59.8 47.8 32.5 18.1 44.0
Highest Mean Temperature (F) 24.9 30.6 39.9 52.1 65.9 72.1 74.6 74.1 64.8 56.0 39.7 26.0 74.6
Year Highest Occurred 1990 1998 1973 1977 1977 1971 1983 1995 1998 1971 1999 1998 1983
Lowest Mean Temperature (F) -1.3 6.2 20.8 38.6 50.7 60.9 64.3 63.3 53.9 42.3 24.6 3.7 -1.3
Year Lowest Occurred 1977 1979 1975 1975 1997 1982 1992 1992 1993 1988 1991 1983 1977
Mean Min. Temperature (F) 2.8 9.4 21.9 34.0 45.8 55.5 59.6 57.3 47.9 36.2 23.5 9.4 33.6
Highest Mean Min. Temperature (F) 15.5 23.8 32.2 40.3 54.0 60.7 63.5 64.3 52.5 46.6 29.0 17.5 64.3
Year Highest Occurred 1990 1998 1973 1977 1977 1971 1999 1995 1973 1971 1998 1997 1995
Lowest Mean Min. Temperature (F) -12.5 -5.0 11.5 28.4 39.0 49.5 54.4 51.3 42.8 29.5 15.8 -5.5 -12.5
Year Lowest Occurred 1977 1979 1975 1996 1997 1982 1992 1992 1976 1988 1976 1983 1977
Mean Precipitation (in.) 1.02 0.88 2.21 3.52 3.92 4.65 4.54 5.17 3.69 2.40 2.36 1.27 35.63
Highest Precipitation (in.) 3.01 2.40 5.31 6.99 9.09 12.23 13.69 11.50 11.04 4.79 6.83 3.55 13.69
Year Highest Occurred 1996 1981 1990 1991 1983 2000 1972 1993 1986 1984 1991 1982 1972
Lowest Precipitation (in.) 0.14 0.02 0.11 0.76 1.17 0.71 1.48 0.84 0.64 0.42 0.04 0.28 0.02
Year Lowest Occurred 1981 1987 1994 2000 1988 1988 1976 1971 1976 1987 1976 1998 1987
Heating Degree Days (F) 1638. 1302. 1056. 608. 277. 58. 17. 43. 187. 536. 978. 1456. 8156.
Cooling Degree Days (F) 0. 0. 0. 1. 38. 115. 194. 151. 29. 1. 0. 0. 529.

Western Regional Climate Center, wrcc@dri.edu