| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 41.9 | 47.8 | 58.0 | 68.2 | 76.5 | 84.6 | 88.5 | 87.6 | 81.5 | 70.6 | 58.0 | 46.5 | 67.5 |
| Highest Mean Max. Temperature (F) | 51.0 | 56.3 | 64.2 | 74.6 | 83.1 | 89.3 | 93.7 | 95.3 | 88.2 | 77.2 | 66.8 | 56.5 | 95.3 |
| Year Highest Occurred | 1990 | 1976 | 1977 | 1981 | 1987 | 1988 | 1986 | 1983 | 1998 | 1971 | 1999 | 1984 | 1983 |
| Lowest Mean Max. Temperature (F) | 28.2 | 35.2 | 51.5 | 60.3 | 72.1 | 79.2 | 84.2 | 81.5 | 74.9 | 64.1 | 50.5 | 35.7 | 28.2 |
| Year Lowest Occurred | 1977 | 1978 | 1978 | 1983 | 1981 | 1997 | 1979 | 1992 | 1974 | 1988 | 1976 | 1989 | 1977 |
| Mean Temperature (F) | 33.2 | 37.7 | 47.6 | 57.3 | 66.1 | 74.4 | 78.2 | 76.7 | 69.8 | 58.5 | 47.9 | 37.5 | 57.1 |
| Highest Mean Temperature (F) | 42.0 | 44.5 | 54.7 | 63.6 | 72.1 | 78.2 | 81.1 | 81.8 | 74.3 | 66.4 | 53.6 | 47.4 | 81.8 |
| Year Highest Occurred | 1990 | 1990 | 1973 | 1981 | 1987 | 1984 | 1993 | 1983 | 1978 | 1971 | 1999 | 1984 | 1983 |
| Lowest Mean Temperature (F) | 18.8 | 24.8 | 40.8 | 50.8 | 61.3 | 70.2 | 75.7 | 71.6 | 65.5 | 52.1 | 38.8 | 25.3 | 18.8 |
| Year Lowest Occurred | 1977 | 1978 | 1996 | 1983 | 1997 | 1992 | 1996 | 1992 | 1975 | 1988 | 1976 | 1989 | 1977 |
| Mean Min. Temperature (F) | 24.4 | 27.5 | 37.1 | 46.4 | 55.7 | 64.2 | 67.9 | 65.8 | 58.0 | 46.3 | 37.7 | 28.4 | 46.6 |
| Highest Mean Min. Temperature (F) | 33.4 | 34.8 | 45.8 | 52.6 | 62.7 | 68.1 | 71.4 | 70.0 | 64.1 | 55.6 | 45.0 | 38.3 | 71.4 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1981 | 1991 | 1971 | 1977 | 1995 | 1986 | 1971 | 1985 | 1984 | 1977 |
| Lowest Mean Min. Temperature (F) | 9.5 | 14.4 | 29.5 | 39.5 | 49.8 | 60.5 | 64.5 | 61.6 | 53.1 | 38.5 | 27.2 | 14.8 | 9.5 |
| Year Lowest Occurred | 1977 | 1978 | 1996 | 1997 | 1997 | 1988 | 1997 | 1992 | 1999 | 1987 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 4.08 | 4.36 | 5.12 | 4.38 | 5.15 | 3.76 | 4.05 | 3.33 | 3.47 | 3.28 | 4.83 | 5.11 | 50.92 |
| Highest Precipitation (in.) | 8.49 | 13.50 | 16.43 | 10.52 | 11.60 | 12.17 | 7.23 | 8.73 | 10.19 | 7.33 | 10.48 | 14.59 | 16.43 |
| Year Highest Occurred | 1978 | 1989 | 1997 | 1983 | 1983 | 1998 | 1972 | 1974 | 1979 | 1985 | 1973 | 1978 | 1997 |
| Lowest Precipitation (in.) | 1.06 | 1.46 | 1.78 | 1.53 | 1.27 | 0.55 | 1.58 | 0.59 | 0.25 | 0.42 | 1.17 | 0.53 | 0.25 |
| Year Lowest Occurred | 1986 | 1980 | 1971 | 1986 | 1994 | 1988 | 1973 | 1999 | 1978 | 1987 | 1976 | 1976 | 1978 |
| Heating Degree Days (F) | 988. | 766. | 543. | 255. | 93. | 4. | 0. | 1. | 36. | 242. | 517. | 853. | 4298. |
| Cooling Degree Days (F) | 0. | 0. | 2. | 23. | 127. | 286. | 410. | 364. | 179. | 40. | 2. | 0. | 1433. |