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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) 23.5 28.0 37.0 49.8 64.6 72.8 78.3 75.9 67.7 55.6 40.5 28.6 51.9
Highest Mean Max. Temperature (F) 32.9 39.1 45.0 57.3 72.6 79.9 84.5 81.5 72.3 61.4 50.1 36.5 84.5
Year Highest Occurred 1990 1998 2000 1987 1977 1988 1988 1991 1998 2000 1999 1998 1988
Lowest Mean Max. Temperature (F) 13.3 18.8 30.2 41.6 55.0 67.4 73.6 70.3 63.3 49.7 33.2 19.7 13.3
Year Lowest Occurred 1977 1979 1972 1975 1997 1982 1972 1977 1993 1979 1995 1983 1977
Mean Temperature (F) 15.8 18.8 27.4 39.0 51.2 60.1 65.8 64.5 56.9 46.3 33.6 21.8 41.8
Highest Mean Temperature (F) 24.6 30.0 35.7 44.7 57.1 65.0 70.3 68.7 61.0 52.9 40.8 29.3 70.3
Year Highest Occurred 1990 1998 2000 1986 1977 1995 1983 1995 1998 1971 1999 1994 1983
Lowest Mean Temperature (F) 5.6 8.1 19.8 31.8 44.3 54.8 61.0 59.0 52.4 41.5 25.8 12.5 5.6
Year Lowest Occurred 1977 1979 1972 1972 1997 1982 1992 1977 1974 1980 1995 1983 1977
Mean Min. Temperature (F) 8.0 9.6 17.7 28.1 37.8 47.3 53.3 53.0 46.1 36.9 26.7 14.9 31.6
Highest Mean Min. Temperature (F) 16.2 20.9 26.3 34.4 43.4 51.5 58.8 58.7 50.6 45.9 31.4 22.7 58.8
Year Highest Occurred 1990 1998 2000 1986 1986 1995 1999 1995 1971 1971 1999 1994 1999
Lowest Mean Min. Temperature (F) -2.1 -2.7 9.5 21.3 32.8 42.2 48.3 47.7 41.0 32.7 18.4 5.2 -2.7
Year Lowest Occurred 1982 1979 1972 1972 1983 1982 1992 1977 1974 1980 1995 1983 1979
Mean Precipitation (in.) 1.73 1.21 2.04 2.00 2.60 3.29 3.10 3.00 3.47 2.96 2.32 2.02 29.74
Highest Precipitation (in.) 3.56 3.43 4.86 4.68 6.63 7.05 6.10 8.59 7.91 5.35 4.58 5.68 8.59
Year Highest Occurred 1997 1985 1979 1980 1983 1996 1982 1988 1980 1983 1985 1977 1988
Lowest Precipitation (in.) 0.36 0.07 0.41 0.02 0.24 0.27 0.70 0.47 1.51 1.07 0.76 0.33 0.02
Year Lowest Occurred 1990 1994 1980 1998 1986 1995 1981 1976 1989 1975 1999 1994 1998
Heating Degree Days (F) 1528. 1295. 1167. 781. 439. 173. 62. 92. 251. 581. 942. 1340. 8651.
Cooling Degree Days (F) 0. 0. 0. 0. 10. 24. 86. 75. 8. 0. 0. 0. 203.

Western Regional Climate Center, wrcc@dri.edu