| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 24.0 | 30.0 | 40.3 | 52.9 | 64.3 | 74.5 | 79.9 | 77.1 | 70.1 | 60.2 | 43.7 | 29.1 | 53.8 |
| Highest Mean Max. Temperature (F) | 39.2 | 42.3 | 51.0 | 61.7 | 69.8 | 81.4 | 83.8 | 80.2 | 76.2 | 66.2 | 50.2 | 43.2 | 58.4 |
| Year Highest Occurred | 1981 | 1977 | 1990 | 1989 | 1974 | 1990 | 1989 | 1985 | 1979 | 1963 | 1962 | 1980 | 1981 |
| Lowest Mean Max. Temperature (F) | 6.8 | 15.9 | 30.3 | 43.3 | 59.8 | 68.5 | 76.4 | 72.9 | 64.0 | 46.3 | 35.8 | 18.1 | 49.1 |
| Year Lowest Occurred | 1984 | 1974 | 1984 | 1984 | 1983 | 1969 | 1973 | 1968 | 1961 | 1969 | 1979 | 1978 | 1984 |
| Mean Temperature (F) | 7.4 | 13.0 | 25.1 | 36.1 | 46.3 | 54.8 | 61.0 | 58.6 | 50.5 | 40.4 | 26.9 | 13.1 | 36.1 |
| Highest Mean Temperature (F) | 20.1 | 24.3 | 35.7 | 43.2 | 49.8 | 58.9 | 63.7 | 62.8 | 56.2 | 45.6 | 30.6 | 26.0 | 40.6 |
| Year Highest Occurred | 1981 | 1986 | 1990 | 1989 | 1984 | 1990 | 1989 | 1983 | 1990 | 1963 | 1981 | 1980 | 1981 |
| Lowest Mean Temperature (F) | -6.5 | -2.3 | 14.1 | 29.8 | 42.4 | 51.5 | 58.4 | 55.1 | 46.1 | 33.6 | 19.6 | 2.0 | 31.5 |
| Year Lowest Occurred | 1984 | 1974 | 1962 | 1984 | 1968 | 1975 | 1962 | 1976 | 1961 | 1969 | 1979 | 1978 | 1975 |
| Mean Min. Temperature (F) | -9.3 | -4.1 | 9.9 | 19.2 | 28.3 | 35.1 | 42.1 | 39.9 | 30.8 | 20.6 | 10.1 | -2.9 | 18.3 |
| Highest Mean Min. Temperature (F) | 3.4 | 12.5 | 20.4 | 26.4 | 32.1 | 39.8 | 45.8 | 45.5 | 37.3 | 30.6 | 15.0 | 8.7 | 22.7 |
| Year Highest Occurred | 1980 | 1986 | 1990 | 1990 | 1981 | 1988 | 1981 | 1983 | 1990 | 1972 | 1970 | 1980 | 1981 |
| Lowest Mean Min. Temperature (F) | -23.5 | -20.4 | -3.0 | 14.0 | 24.2 | 30.5 | 38.5 | 33.9 | 25.3 | 10.8 | 1.3 | -15.3 | 12.4 |
| Year Lowest Occurred | 1966 | 1974 | 1962 | 1968 | 1968 | 1968 | 1979 | 1975 | 1975 | 1975 | 1975 | 1975 | 1975 |
| Mean Precipitation (in.) | 0.84 | 0.63 | 0.64 | 0.56 | 0.68 | 0.64 | 1.36 | 1.55 | 1.08 | 0.85 | 0.57 | 0.80 | 10.20 |
| Highest Precipitation (in.) | 2.64 | 1.83 | 3.31 | 1.71 | 1.58 | 2.49 | 3.81 | 3.61 | 3.33 | 4.13 | 1.87 | 2.22 | 16.45 |
| Year Highest Occurred | 1988 | 1962 | 1961 | 1961 | 1981 | 1969 | 1965 | 1971 | 1961 | 1969 | 1965 | 1983 | 1969 |
| Lowest Precipitation (in.) | 0.09 | 0.00 | 0.00 | 0.01 | 0.02 | 0.00 | 0.15 | 0.14 | 0.02 | 0.02 | 0.01 | 0.00 | 7.10 |
| Year Lowest Occurred | 1981 | 1972 | 1977 | 1979 | 1963 | 1961 | 1979 | 1985 | 1978 | 1964 | 1989 | 1990 | 1972 |
| Heating Degree Days (F) | 1786. | 1456. | 1237. | 867. | 580. | 306. | 130. | 204. | 435. | 763. | 1143. | 1609. | 10516. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 6. | 6. | 0. | 0. | 0. | 0. | 12. |