| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 22.9 | 29.0 | 41.3 | 58.2 | 71.5 | 80.7 | 84.5 | 81.5 | 72.6 | 61.1 | 42.6 | 26.9 | 56.1 |
| Highest Mean Max. Temperature (F) | 38.5 | 43.5 | 55.4 | 67.6 | 79.0 | 86.7 | 89.6 | 87.9 | 79.4 | 74.6 | 52.0 | 36.5 | 60.3 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1974 | 1983 | 1978 | 1963 | 1963 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 8.5 | 17.1 | 27.5 | 46.9 | 64.9 | 74.8 | 79.7 | 76.7 | 63.1 | 55.5 | 30.6 | 10.1 | 52.7 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1975 | 1983 | 1969 | 1962 | 1985 | 1965 | 1976 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 13.1 | 19.3 | 31.7 | 46.7 | 59.2 | 68.7 | 72.9 | 69.9 | 61.0 | 49.6 | 33.4 | 18.1 | 45.3 |
| Highest Mean Temperature (F) | 28.3 | 33.1 | 40.9 | 54.0 | 66.3 | 74.1 | 77.3 | 75.5 | 67.5 | 58.6 | 38.7 | 27.9 | 50.0 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1977 | 1977 | 1988 | 1974 | 1983 | 1978 | 1963 | 1981 | 1965 | 1987 |
| Lowest Mean Temperature (F) | 0.3 | 7.4 | 19.0 | 39.0 | 53.2 | 62.9 | 69.2 | 64.4 | 53.4 | 44.2 | 23.1 | 1.9 | 42.3 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1975 | 1983 | 1982 | 1971 | 1985 | 1965 | 1976 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 3.3 | 9.5 | 22.1 | 35.1 | 46.9 | 56.6 | 61.2 | 58.3 | 49.4 | 38.0 | 24.1 | 9.2 | 34.5 |
| Highest Mean Min. Temperature (F) | 18.0 | 22.6 | 32.2 | 41.8 | 53.8 | 61.4 | 65.5 | 63.0 | 55.5 | 44.0 | 29.9 | 19.3 | 39.7 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1988 | 1987 | 1983 | 1978 | 1973 | 1987 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -8.0 | -2.4 | 10.4 | 30.8 | 41.1 | 50.8 | 56.8 | 52.1 | 43.6 | 32.9 | 15.6 | -6.4 | 31.9 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1961 | 1967 | 1982 | 1985 | 1985 | 1965 | 1976 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.52 | 0.76 | 1.81 | 2.77 | 3.45 | 4.21 | 3.87 | 3.74 | 3.57 | 2.07 | 1.39 | 0.81 | 28.97 |
| Highest Precipitation (in.) | 1.88 | 2.86 | 4.43 | 5.81 | 9.61 | 10.40 | 10.55 | 8.93 | 9.41 | 5.56 | 4.07 | 3.00 | 42.95 |
| Year Highest Occurred | 1969 | 1971 | 1987 | 1984 | 1982 | 1984 | 1987 | 1979 | 1964 | 1968 | 1983 | 1982 | 1982 |
| Lowest Precipitation (in.) | 0.06 | 0.02 | 0.31 | 0.43 | 1.30 | 1.35 | 0.21 | 0.41 | 0.65 | 0.00 | 0.04 | 0.05 | 15.33 |
| Year Lowest Occurred | 1977 | 1986 | 1988 | 1987 | 1963 | 1970 | 1975 | 1976 | 1984 | 1989 | 1963 | 1988 | 1976 |
| Heating Degree Days (F) | 1609. | 1280. | 1032. | 549. | 222. | 33. | 6. | 21. | 153. | 477. | 948. | 1454. | 7784. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 42. | 144. | 251. | 173. | 33. | 0. | 0. | 0. | 643. |