| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 11.9 | 19.4 | 31.0 | 50.1 | 66.2 | 74.0 | 78.6 | 78.6 | 67.4 | 53.2 | 31.1 | 17.1 | 48.2 |
| Highest Mean Max. Temperature (F) | 26.2 | 31.6 | 42.5 | 63.9 | 76.6 | 86.7 | 85.4 | 86.5 | 73.4 | 57.4 | 46.7 | 31.0 | 86.7 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1980 | 1980 | 1988 | 1989 | 1983 | 1990 | 1989 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | -4.2 | 0.3 | 20.9 | 33.1 | 51.7 | 67.4 | 69.7 | 70.5 | 59.8 | 46.6 | 17.0 | 2.9 | -4.2 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1974 | 1985 | 1992 | 1977 | 1974 | 1991 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 0.8 | 8.8 | 21.3 | 38.7 | 53.0 | 61.2 | 65.5 | 64.2 | 53.5 | 40.5 | 20.9 | 6.7 | 36.3 |
| Highest Mean Temperature (F) | 13.9 | 21.9 | 32.9 | 48.7 | 60.9 | 70.6 | 69.9 | 70.3 | 58.7 | 46.0 | 33.1 | 20.1 | 70.6 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1987 | 1977 | 1988 | 1975 | 1983 | 1994 | 1994 | 1999 | 1999 | 1988 |
| Lowest Mean Temperature (F) | -15.1 | -9.9 | 11.4 | 26.7 | 43.9 | 55.0 | 58.0 | 56.7 | 46.7 | 32.7 | 7.1 | -6.6 | -15.1 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1974 | 1985 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -10.4 | -1.8 | 11.6 | 27.3 | 39.8 | 48.4 | 52.3 | 49.8 | 39.6 | 27.8 | 10.7 | -3.8 | 24.3 |
| Highest Mean Min. Temperature (F) | 2.4 | 13.1 | 23.3 | 34.2 | 46.8 | 55.0 | 57.6 | 55.0 | 44.2 | 37.0 | 19.9 | 10.4 | 57.6 |
| Year Highest Occurred | 1973 | 1984 | 2000 | 1987 | 1977 | 1995 | 1975 | 1995 | 1994 | 1994 | 1980 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -26.0 | -20.1 | 0.9 | 20.3 | 33.3 | 42.5 | 46.4 | 42.9 | 33.7 | 16.8 | -2.8 | -17.8 | -26.0 |
| Year Lowest Occurred | 1982 | 1979 | 1979 | 1979 | 1983 | 1985 | 1992 | 1977 | 1974 | 1976 | 1985 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.64 | 0.63 | 0.85 | 1.12 | 2.39 | 3.19 | 2.87 | 2.59 | 1.62 | 1.22 | 0.81 | 0.57 | 18.50 |
| Highest Precipitation (in.) | 2.27 | 4.50 | 2.89 | 4.09 | 9.68 | 5.50 | 9.02 | 7.10 | 3.92 | 5.58 | 2.95 | 1.47 | 9.68 |
| Year Highest Occurred | 1981 | 1998 | 1990 | 1975 | 1999 | 1971 | 1993 | 1980 | 1973 | 1994 | 1995 | 1996 | 1999 |
| Lowest Precipitation (in.) | 0.07 | 0.00 | 0.00 | 0.02 | 0.28 | 1.04 | 0.13 | 0.35 | 0.14 | 0.02 | 0.00 | 0.12 | 0.00 |
| Year Lowest Occurred | 1973 | 1997 | 1977 | 1985 | 1980 | 1992 | 1976 | 1988 | 1998 | 1999 | 1999 | 1989 | 1997 |
| Heating Degree Days (F) | 1993. | 1575. | 1355. | 790. | 390. | 166. | 75. | 129. | 355. | 761. | 1323. | 1810. | 10722. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 18. | 52. | 88. | 104. | 9. | 0. | 0. | 0. | 272. |