| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 22.8 | 28.3 | 35.2 | 42.2 | 51.0 | 61.1 | 70.4 | 70.4 | 60.3 | 48.2 | 33.1 | 24.8 | 45.7 |
| Highest Mean Max. Temperature (F) | 33.8 | 34.7 | 41.9 | 49.5 | 58.1 | 69.7 | 76.3 | 76.5 | 68.0 | 56.9 | 43.8 | 33.7 | 76.5 |
| Year Highest Occurred | 1981 | 1991 | 1986 | 1977 | 1992 | 1988 | 1988 | 1971 | 1990 | 1988 | 1999 | 1980 | 1971 |
| Lowest Mean Max. Temperature (F) | 12.4 | 21.3 | 28.8 | 35.5 | 44.4 | 52.8 | 59.9 | 64.8 | 52.3 | 41.1 | 26.6 | 16.0 | 12.4 |
| Year Lowest Occurred | 1979 | 1985 | 1977 | 1975 | 1996 | 1998 | 1993 | 1993 | 1986 | 1984 | 1994 | 1990 | 1979 |
| Mean Temperature (F) | 9.9 | 13.4 | 19.8 | 28.4 | 38.1 | 46.8 | 54.0 | 53.5 | 44.5 | 34.6 | 21.6 | 13.0 | 31.5 |
| Highest Mean Temperature (F) | 18.9 | 20.3 | 26.0 | 35.4 | 45.4 | 53.4 | 58.1 | 57.9 | 50.9 | 40.1 | 30.7 | 22.6 | 58.1 |
| Year Highest Occurred | 1981 | 1986 | 1986 | 1987 | 1987 | 1988 | 1998 | 1971 | 1998 | 1988 | 1999 | 1980 | 1998 |
| Lowest Mean Temperature (F) | -2.3 | 2.5 | 11.2 | 19.9 | 32.9 | 41.5 | 46.6 | 48.1 | 37.6 | 27.8 | 14.3 | 3.3 | -2.3 |
| Year Lowest Occurred | 1979 | 1985 | 1976 | 1975 | 1975 | 1998 | 1993 | 1985 | 1985 | 1984 | 1994 | 1990 | 1979 |
| Mean Min. Temperature (F) | -3.1 | -1.5 | 4.3 | 14.6 | 25.1 | 32.5 | 37.5 | 36.5 | 28.6 | 20.9 | 10.0 | 1.1 | 17.2 |
| Highest Mean Min. Temperature (F) | 8.6 | 9.9 | 10.2 | 21.6 | 33.3 | 37.4 | 42.7 | 42.0 | 35.6 | 25.7 | 17.6 | 11.5 | 42.7 |
| Year Highest Occurred | 1998 | 1986 | 1987 | 1987 | 1987 | 1997 | 1987 | 1983 | 1998 | 1983 | 1999 | 1980 | 1987 |
| Lowest Mean Min. Temperature (F) | -17.1 | -16.4 | -7.9 | 4.3 | 17.9 | 27.5 | 32.6 | 30.2 | 22.3 | 14.5 | 1.5 | -9.5 | -17.1 |
| Year Lowest Occurred | 1979 | 1985 | 1976 | 1975 | 1974 | 1975 | 1972 | 1985 | 1985 | 1984 | 2000 | 1990 | 1979 |
| Mean Precipitation (in.) | 1.91 | 1.49 | 1.73 | 1.48 | 2.06 | 2.08 | 1.66 | 1.69 | 1.59 | 1.32 | 1.71 | 1.68 | 20.40 |
| Highest Precipitation (in.) | 3.58 | 5.31 | 4.06 | 3.05 | 4.70 | 5.27 | 4.13 | 3.28 | 3.54 | 5.38 | 3.88 | 4.89 | 5.38 |
| Year Highest Occurred | 1978 | 1986 | 1974 | 1993 | 1981 | 1998 | 1985 | 1984 | 1972 | 1975 | 1986 | 1996 | 1975 |
| Lowest Precipitation (in.) | 0.36 | 0.35 | 0.49 | 0.42 | 0.61 | 0.83 | 0.00 | 0.25 | 0.11 | 0.06 | 0.29 | 0.06 | 0.00 |
| Year Lowest Occurred | 1992 | 1977 | 1984 | 1987 | 1979 | 1974 | 2000 | 1992 | 1987 | 1986 | 1993 | 1986 | 2000 |
| Heating Degree Days (F) | 1712. | 1446. | 1404. | 1098. | 835. | 545. | 344. | 362. | 616. | 944. | 1303. | 1614. | 12223. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 2. | 2. | 0. | 0. | 0. | 0. | 4. |