| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.3 | 22.1 | 34.6 | 53.0 | 68.3 | 76.4 | 81.2 | 80.4 | 69.4 | 55.6 | 33.3 | 19.5 | 50.7 |
| Highest Mean Max. Temperature (F) | 31.4 | 32.1 | 45.1 | 64.8 | 78.0 | 86.2 | 87.6 | 89.6 | 77.9 | 61.8 | 48.5 | 34.0 | 89.6 |
| Year Highest Occurred | 1990 | 2000 | 1981 | 1980 | 1977 | 1988 | 1989 | 1983 | 1976 | 1974 | 1999 | 1999 | 1983 |
| Lowest Mean Max. Temperature (F) | 0.0 | 5.5 | 24.2 | 40.2 | 59.5 | 69.5 | 71.8 | 74.3 | 62.2 | 50.5 | 22.5 | 6.4 | 0.0 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1993 | 1992 | 1977 | 1985 | 1995 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 5.0 | 12.8 | 25.5 | 41.5 | 55.6 | 64.3 | 68.9 | 67.2 | 56.7 | 43.9 | 24.9 | 10.8 | 39.8 |
| Highest Mean Temperature (F) | 20.4 | 24.9 | 34.7 | 49.8 | 65.0 | 71.9 | 73.4 | 74.3 | 63.1 | 49.0 | 35.5 | 22.1 | 74.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -9.8 | -3.1 | 15.8 | 32.3 | 48.1 | 58.8 | 61.4 | 60.7 | 52.2 | 39.5 | 13.0 | -1.9 | -9.8 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1985 | 1992 | 1977 | 1985 | 1991 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -4.3 | 3.4 | 16.3 | 30.0 | 42.8 | 52.2 | 56.5 | 54.0 | 43.9 | 32.2 | 16.5 | 2.1 | 28.8 |
| Highest Mean Min. Temperature (F) | 9.3 | 18.5 | 27.7 | 35.8 | 52.0 | 57.5 | 59.8 | 59.0 | 50.1 | 38.9 | 27.4 | 13.7 | 59.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1987 | 1983 | 1978 | 1994 | 1981 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -19.6 | -11.7 | 7.4 | 24.4 | 35.9 | 46.5 | 51.0 | 47.2 | 38.3 | 27.4 | 3.0 | -10.3 | -19.6 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1982 | 1992 | 1977 | 1974 | 1988 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.67 | 0.53 | 1.01 | 1.31 | 2.56 | 3.30 | 3.33 | 2.78 | 1.96 | 1.65 | 0.90 | 0.50 | 20.50 |
| Highest Precipitation (in.) | 1.30 | 1.42 | 2.29 | 4.32 | 7.56 | 7.88 | 11.12 | 5.22 | 5.82 | 5.95 | 3.12 | 1.38 | 11.12 |
| Year Highest Occurred | 1996 | 1998 | 1995 | 1986 | 1985 | 1990 | 1993 | 1980 | 1986 | 1982 | 1977 | 1977 | 1993 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.00 | 0.00 | 0.48 | 0.84 | 0.62 | 0.46 | 0.07 | 0.06 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 2000 | 1986 | 1986 | 1980 | 1976 | 1989 | 1985 | 1976 | 1974 | 1987 | 1999 | 1999 | 2000 |
| Heating Degree Days (F) | 1861. | 1463. | 1226. | 707. | 319. | 110. | 41. | 73. | 269. | 655. | 1204. | 1679. | 9607. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 26. | 89. | 160. | 142. | 18. | 0. | 0. | 0. | 436. |