| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.1 | 21.3 | 33.4 | 52.4 | 68.6 | 77.0 | 81.5 | 80.6 | 69.4 | 55.3 | 34.1 | 19.9 | 50.6 |
| Highest Mean Max. Temperature (F) | 28.2 | 32.2 | 44.5 | 63.1 | 77.7 | 86.1 | 88.2 | 86.5 | 76.9 | 59.9 | 47.6 | 30.6 | 88.2 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1980 | 1977 | 1988 | 1989 | 1983 | 1998 | 1975 | 1999 | 1999 | 1989 |
| Lowest Mean Max. Temperature (F) | 1.6 | 8.2 | 23.2 | 40.5 | 57.8 | 70.0 | 72.9 | 74.8 | 62.7 | 51.0 | 24.0 | 7.6 | 1.6 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1985 | 1995 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 3.8 | 11.2 | 24.5 | 41.7 | 56.4 | 65.3 | 69.5 | 68.0 | 57.0 | 44.0 | 25.5 | 10.6 | 39.8 |
| Highest Mean Temperature (F) | 17.6 | 26.2 | 35.3 | 49.7 | 65.6 | 72.6 | 74.0 | 73.4 | 62.6 | 49.9 | 35.7 | 24.0 | 74.0 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1974 | 1983 | 1978 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -9.8 | -2.5 | 14.2 | 33.2 | 48.1 | 58.6 | 61.8 | 62.0 | 52.2 | 39.6 | 13.7 | -1.2 | -9.8 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -6.5 | 1.0 | 15.6 | 31.0 | 44.1 | 53.5 | 57.5 | 55.3 | 44.6 | 32.7 | 16.8 | 1.2 | 28.9 |
| Highest Mean Min. Temperature (F) | 6.9 | 20.4 | 27.8 | 36.5 | 53.5 | 59.1 | 61.8 | 60.4 | 50.2 | 40.3 | 26.1 | 17.6 | 61.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1978 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -21.5 | -13.3 | 5.2 | 25.8 | 37.7 | 47.2 | 50.7 | 49.3 | 39.0 | 26.4 | 2.9 | -10.7 | -21.5 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1996 | 1983 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1985 | 1979 |
| Mean Precipitation (in.) | 0.54 | 0.54 | 0.74 | 1.32 | 2.44 | 3.51 | 3.12 | 2.94 | 2.24 | 1.84 | 0.99 | 0.50 | 20.72 |
| Highest Precipitation (in.) | 1.38 | 1.77 | 2.04 | 5.01 | 6.04 | 7.11 | 7.56 | 6.03 | 6.69 | 5.32 | 4.42 | 1.72 | 7.56 |
| Year Highest Occurred | 1997 | 1979 | 1983 | 1986 | 1998 | 1994 | 1995 | 1999 | 1973 | 1998 | 2000 | 1996 | 1995 |
| Lowest Precipitation (in.) | 0.10 | 0.07 | 0.00 | 0.00 | 0.33 | 1.04 | 0.43 | 0.33 | 0.07 | 0.06 | 0.00 | 0.05 | 0.00 |
| Year Lowest Occurred | 2000 | 1978 | 1986 | 1988 | 1980 | 1987 | 1975 | 1996 | 1974 | 1992 | 1999 | 1979 | 1986 |
| Heating Degree Days (F) | 1900. | 1508. | 1255. | 701. | 306. | 93. | 39. | 58. | 257. | 652. | 1186. | 1687. | 9642. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 38. | 101. | 178. | 149. | 17. | 0. | 0. | 0. | 484. |