| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 12.2 | 19.8 | 31.5 | 51.0 | 67.6 | 74.9 | 78.7 | 78.2 | 67.4 | 53.5 | 32.7 | 17.8 | 48.8 |
| Highest Mean Max. Temperature (F) | 24.4 | 31.9 | 42.4 | 64.8 | 79.0 | 85.6 | 85.3 | 86.3 | 75.3 | 59.1 | 45.2 | 30.2 | 86.3 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1977 | 1977 | 1988 | 1989 | 1983 | 1976 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Max. Temperature (F) | -1.9 | 2.4 | 22.0 | 37.5 | 56.7 | 67.6 | 69.5 | 71.5 | 61.5 | 46.5 | 20.2 | 4.0 | -1.9 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1998 | 1992 | 1985 | 1985 | 1991 | 1996 | 2000 | 1982 |
| Mean Temperature (F) | 2.5 | 9.9 | 22.5 | 39.8 | 54.4 | 63.1 | 67.1 | 65.4 | 55.0 | 42.4 | 24.1 | 8.9 | 37.9 |
| Highest Mean Temperature (F) | 14.9 | 23.1 | 32.5 | 49.4 | 66.3 | 71.3 | 72.4 | 71.9 | 60.4 | 48.4 | 35.7 | 24.0 | 72.4 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1977 | 1977 | 1988 | 1989 | 1983 | 1976 | 1973 | 1981 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -11.4 | -6.6 | 13.0 | 28.9 | 46.5 | 56.4 | 60.2 | 59.7 | 50.6 | 36.5 | 11.9 | -4.8 | -11.4 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1985 | 1992 | 1977 | 1985 | 1991 | 1996 | 2000 | 1982 |
| Mean Min. Temperature (F) | -7.3 | 0.0 | 13.5 | 28.5 | 41.2 | 51.3 | 55.5 | 52.6 | 42.6 | 31.2 | 15.4 | -0.1 | 27.0 |
| Highest Mean Min. Temperature (F) | 5.4 | 16.3 | 24.6 | 35.1 | 53.5 | 56.9 | 59.9 | 57.4 | 46.5 | 37.8 | 26.6 | 17.8 | 59.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1974 | 1983 | 1978 | 1994 | 1981 | 1997 | 1974 |
| Lowest Mean Min. Temperature (F) | -20.9 | -15.7 | 3.9 | 20.3 | 34.7 | 45.0 | 50.9 | 46.0 | 38.6 | 26.5 | 1.8 | -13.6 | -20.9 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1985 | 1992 | 1977 | 1974 | 1991 | 1985 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.39 | 0.41 | 0.66 | 1.10 | 2.19 | 3.17 | 3.31 | 2.63 | 1.78 | 1.54 | 0.68 | 0.39 | 18.25 |
| Highest Precipitation (in.) | 1.02 | 1.49 | 1.67 | 3.25 | 5.46 | 6.01 | 8.46 | 7.41 | 5.41 | 4.67 | 2.86 | 1.01 | 8.46 |
| Year Highest Occurred | 1977 | 1998 | 1971 | 1979 | 1974 | 2000 | 1993 | 1980 | 1977 | 1997 | 2000 | 1996 | 1993 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.06 | 0.00 | 0.52 | 0.65 | 0.44 | 0.47 | 0.27 | 0.10 | 0.00 | 0.02 | 0.00 |
| Year Lowest Occurred | 1973 | 1993 | 1978 | 1988 | 1984 | 1978 | 1989 | 1971 | 1976 | 1990 | 1999 | 1981 | 1973 |
| Heating Degree Days (F) | 1940. | 1543. | 1317. | 760. | 357. | 136. | 58. | 98. | 311. | 703. | 1229. | 1743. | 10195. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 28. | 80. | 121. | 111. | 10. | 0. | 0. | 0. | 352. |