| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 13.5 | 19.8 | 32.2 | 50.8 | 65.9 | 75.3 | 81.1 | 79.6 | 67.4 | 54.9 | 34.6 | 18.6 | 49.5 |
| Highest Mean Max. Temperature (F) | 29.1 | 32.2 | 41.6 | 62.4 | 78.2 | 86.5 | 87.2 | 87.9 | 75.2 | 69.5 | 43.5 | 29.1 | 53.6 |
| Year Highest Occurred | 1990 | 1984 | 1977 | 1977 | 1977 | 1988 | 1988 | 1961 | 1963 | 1963 | 1981 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | -2.4 | 4.8 | 23.0 | 35.9 | 56.2 | 67.3 | 75.6 | 73.1 | 53.9 | 47.0 | 22.9 | 4.3 | 45.4 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1979 | 1979 | 1969 | 1971 | 1985 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 3.9 | 9.8 | 22.7 | 39.8 | 53.7 | 63.7 | 69.1 | 67.0 | 55.4 | 44.0 | 26.1 | 9.7 | 38.7 |
| Highest Mean Temperature (F) | 20.6 | 24.0 | 33.6 | 49.6 | 64.5 | 73.1 | 73.7 | 73.1 | 60.7 | 54.3 | 35.6 | 20.6 | 44.3 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 1963 | 1981 | 1987 | 1987 |
| Lowest Mean Temperature (F) | -10.6 | -4.8 | 12.7 | 30.3 | 47.5 | 55.9 | 64.5 | 61.3 | 44.2 | 37.9 | 15.4 | -3.2 | 35.3 |
| Year Lowest Occurred | 1982 | 1979 | 1969 | 1979 | 1979 | 1969 | 1971 | 1977 | 1965 | 1969 | 1985 | 1983 | 1966 |
| Mean Min. Temperature (F) | -5.6 | -0.2 | 13.2 | 28.7 | 41.5 | 52.1 | 57.1 | 54.3 | 43.4 | 33.1 | 17.6 | 0.8 | 28.0 |
| Highest Mean Min. Temperature (F) | 12.0 | 17.2 | 25.7 | 37.1 | 50.7 | 59.6 | 61.5 | 60.5 | 48.7 | 39.1 | 27.6 | 14.1 | 34.9 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 1963 | 1981 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -20.0 | -14.4 | 2.0 | 23.5 | 34.5 | 44.5 | 52.3 | 49.0 | 34.5 | 25.7 | 7.9 | -10.7 | 24.1 |
| Year Lowest Occurred | 1966 | 1979 | 1969 | 1967 | 1967 | 1969 | 1967 | 1977 | 1965 | 1976 | 1985 | 1983 | 1966 |
| Mean Precipitation (in.) | 0.55 | 0.49 | 0.86 | 1.07 | 2.13 | 3.35 | 2.66 | 2.07 | 1.95 | 1.13 | 0.66 | 0.56 | 17.48 |
| Highest Precipitation (in.) | 1.26 | 1.41 | 3.21 | 3.51 | 6.26 | 6.63 | 8.10 | 4.17 | 5.24 | 4.93 | 3.88 | 1.14 | 27.77 |
| Year Highest Occurred | 1982 | 1987 | 1966 | 1986 | 1974 | 1981 | 1986 | 1985 | 1965 | 1982 | 1986 | 1977 | 1986 |
| Lowest Precipitation (in.) | 0.00 | 0.01 | 0.14 | 0.00 | 0.32 | 0.85 | 0.31 | 0.22 | 0.34 | 0.02 | 0.05 | 0.10 | 10.08 |
| Year Lowest Occurred | 1973 | 1965 | 1961 | 1980 | 1984 | 1974 | 1976 | 1984 | 1974 | 1976 | 1976 | 1979 | 1967 |
| Heating Degree Days (F) | 1894. | 1546. | 1311. | 756. | 377. | 124. | 29. | 78. | 303. | 651. | 1167. | 1714. | 9950. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 27. | 85. | 156. | 140. | 15. | 0. | 0. | 0. | 423. |