| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 13.0 | 19.7 | 33.3 | 52.7 | 68.8 | 78.1 | 82.6 | 81.5 | 69.7 | 56.5 | 34.5 | 18.0 | 50.7 |
| Highest Mean Max. Temperature (F) | 28.0 | 31.5 | 43.4 | 66.1 | 80.8 | 88.7 | 87.4 | 89.5 | 77.8 | 70.2 | 44.9 | 29.8 | 55.9 |
| Year Highest Occurred | 1990 | 1984 | 1977 | 1987 | 1977 | 1988 | 1988 | 1983 | 1976 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 0.3 | 4.6 | 23.9 | 41.1 | 58.5 | 69.6 | 77.2 | 74.1 | 57.5 | 47.1 | 22.5 | 5.0 | 47.1 |
| Year Lowest Occurred | 1982 | 1979 | 1970 | 1979 | 1974 | 1969 | 1971 | 1974 | 1965 | 1969 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 4.1 | 10.0 | 23.9 | 41.6 | 55.9 | 65.2 | 69.8 | 67.8 | 57.2 | 45.2 | 26.3 | 9.4 | 39.7 |
| Highest Mean Temperature (F) | 18.8 | 24.1 | 33.8 | 52.1 | 66.9 | 74.8 | 74.9 | 75.0 | 63.1 | 55.8 | 36.2 | 20.7 | 45.1 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 1963 | 1981 | 1974 | 1987 |
| Lowest Mean Temperature (F) | -8.9 | -3.7 | 11.4 | 33.1 | 48.6 | 56.7 | 64.7 | 61.8 | 47.2 | 39.1 | 12.5 | -1.9 | 36.4 |
| Year Lowest Occurred | 1982 | 1979 | 1970 | 1979 | 1974 | 1969 | 1971 | 1974 | 1965 | 1969 | 1985 | 1983 | 1972 |
| Mean Min. Temperature (F) | -4.9 | 0.2 | 14.4 | 30.4 | 42.8 | 52.3 | 56.9 | 54.0 | 44.6 | 33.9 | 18.0 | 0.8 | 28.6 |
| Highest Mean Min. Temperature (F) | 10.8 | 17.3 | 26.2 | 38.0 | 52.9 | 60.8 | 63.0 | 60.5 | 50.8 | 41.4 | 27.4 | 14.1 | 34.2 |
| Year Highest Occurred | 1969 | 1987 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1990 | 1963 | 1981 | 1974 | 1987 |
| Lowest Mean Min. Temperature (F) | -18.6 | -12.0 | -1.2 | 24.2 | 36.8 | 43.7 | 52.1 | 48.5 | 36.9 | 26.1 | 2.5 | -11.0 | 25.4 |
| Year Lowest Occurred | 1966 | 1979 | 1970 | 1962 | 1961 | 1969 | 1973 | 1977 | 1965 | 1976 | 1985 | 1985 | 1965 |
| Mean Precipitation (in.) | 0.60 | 0.44 | 0.89 | 1.52 | 2.22 | 3.07 | 2.64 | 2.17 | 1.82 | 1.22 | 0.64 | 0.53 | 17.76 |
| Highest Precipitation (in.) | 2.33 | 1.48 | 2.43 | 4.02 | 6.00 | 7.93 | 5.48 | 5.68 | 6.38 | 4.37 | 2.04 | 1.50 | 24.95 |
| Year Highest Occurred | 1989 | 1981 | 1966 | 1964 | 1977 | 1964 | 1986 | 1985 | 1965 | 1984 | 1986 | 1988 | 1965 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.04 | 0.00 | 0.27 | 0.66 | 0.13 | 0.31 | 0.24 | 0.04 | 0.00 | 0.09 | 10.72 |
| Year Lowest Occurred | 1990 | 1968 | 1969 | 1988 | 1976 | 1988 | 1976 | 1961 | 1974 | 1989 | 1976 | 1971 | 1976 |
| Heating Degree Days (F) | 1888. | 1540. | 1274. | 702. | 325. | 106. | 27. | 69. | 260. | 614. | 1161. | 1724. | 9690. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 43. | 112. | 176. | 156. | 26. | 0. | 0. | 0. | 513. |