| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 46.6 | 50.2 | 53.6 | 58.2 | 63.0 | 66.4 | 70.9 | 71.9 | 70.1 | 61.5 | 51.7 | 46.2 | 59.2 |
| Highest Mean Max. Temperature (F) | 52.0 | 56.0 | 59.6 | 62.3 | 68.8 | 70.8 | 76.6 | 76.6 | 76.6 | 66.5 | 57.2 | 51.6 | 76.6 |
| Year Highest Occurred | 1981 | 1977 | 1992 | 1987 | 1992 | 1986 | 1985 | 1986 | 1974 | 1976 | 1976 | 1979 | 1986 |
| Lowest Mean Max. Temperature (F) | 41.5 | 42.8 | 48.4 | 52.5 | 57.6 | 62.6 | 67.2 | 66.3 | 65.7 | 57.0 | 43.0 | 41.1 | 41.1 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1974 | 1971 | 1993 | 1975 | 1972 | 1990 | 1985 | 1990 | 1990 |
| Mean Temperature (F) | 40.3 | 42.5 | 44.6 | 48.0 | 52.3 | 56.0 | 59.5 | 59.9 | 57.5 | 51.0 | 44.3 | 40.2 | 49.7 |
| Highest Mean Temperature (F) | 44.6 | 46.9 | 48.8 | 50.6 | 56.6 | 59.4 | 62.1 | 62.7 | 61.8 | 54.4 | 48.4 | 45.6 | 62.7 |
| Year Highest Occurred | 1983 | 1977 | 1992 | 1987 | 1993 | 1978 | 1995 | 1997 | 1979 | 1976 | 1987 | 1979 | 1997 |
| Lowest Mean Temperature (F) | 33.4 | 34.3 | 40.7 | 43.8 | 49.0 | 52.9 | 57.2 | 55.7 | 54.3 | 48.2 | 36.1 | 34.6 | 33.4 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1974 | 1971 | 1977 | 1973 | 1972 | 1984 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 34.0 | 34.7 | 35.6 | 37.8 | 41.6 | 45.5 | 48.1 | 47.9 | 44.8 | 40.5 | 36.9 | 34.1 | 40.1 |
| Highest Mean Min. Temperature (F) | 38.0 | 39.3 | 39.2 | 42.0 | 46.3 | 48.8 | 52.6 | 51.3 | 50.9 | 46.3 | 41.1 | 39.8 | 52.6 |
| Year Highest Occurred | 1992 | 1978 | 1986 | 1996 | 1993 | 1998 | 1998 | 1997 | 1979 | 1988 | 1995 | 1980 | 1998 |
| Lowest Mean Min. Temperature (F) | 25.3 | 25.9 | 31.0 | 32.2 | 38.6 | 42.9 | 45.6 | 43.9 | 40.9 | 35.4 | 29.2 | 28.1 | 25.3 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1982 | 1978 | 1979 | 1974 | 1973 | 1971 | 1974 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 15.39 | 13.42 | 12.34 | 8.38 | 6.17 | 3.70 | 2.82 | 2.96 | 4.84 | 10.32 | 16.41 | 16.53 | 113.28 |
| Highest Precipitation (in.) | 25.86 | 25.56 | 22.99 | 16.72 | 14.98 | 8.08 | 13.69 | 12.12 | 16.89 | 33.40 | 28.92 | 33.49 | 33.49 |
| Year Highest Occurred | 1971 | 1982 | 1974 | 1981 | 1974 | 1981 | 1983 | 1991 | 1978 | 1975 | 1977 | 1979 | 1979 |
| Lowest Precipitation (in.) | 2.35 | 0.35 | 1.89 | 2.89 | 1.43 | 1.30 | 0.15 | 0.00 | 0.02 | 1.80 | 5.12 | 3.72 | 0.00 |
| Year Lowest Occurred | 1985 | 1993 | 1992 | 1998 | 1982 | 1972 | 1985 | 1998 | 1991 | 1972 | 1979 | 1985 | 1998 |
| Heating Degree Days (F) | 766. | 631. | 631. | 512. | 393. | 271. | 173. | 164. | 229. | 434. | 622. | 770. | 5596. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 3. | 5. | 3. | 0. | 0. | 0. | 11. |