| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 19.9 | 25.6 | 37.7 | 54.8 | 69.1 | 78.3 | 82.2 | 79.3 | 71.0 | 59.0 | 41.1 | 24.8 | 53.6 |
| Highest Mean Max. Temperature (F) | 35.1 | 39.0 | 48.8 | 64.1 | 78.6 | 88.1 | 87.7 | 87.0 | 78.5 | 69.9 | 48.2 | 33.5 | 58.1 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1963 | 1990 | 1965 | 1987 |
| Lowest Mean Max. Temperature (F) | 6.7 | 15.1 | 25.6 | 43.5 | 63.0 | 70.6 | 77.7 | 74.6 | 61.4 | 53.7 | 31.2 | 10.0 | 50.3 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1975 | 1967 | 1969 | 1962 | 1985 | 1965 | 1987 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 9.9 | 15.8 | 28.8 | 44.6 | 57.6 | 67.1 | 71.2 | 68.3 | 59.5 | 47.8 | 32.2 | 15.9 | 43.2 |
| Highest Mean Temperature (F) | 25.7 | 29.1 | 38.8 | 52.2 | 66.5 | 73.9 | 75.5 | 75.0 | 65.8 | 58.0 | 37.4 | 26.1 | 47.7 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1988 | 1983 | 1983 | 1978 | 1963 | 1963 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -2.4 | 4.7 | 15.7 | 37.1 | 51.3 | 59.8 | 67.2 | 64.4 | 53.0 | 42.5 | 23.0 | -0.1 | 40.6 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1975 | 1966 | 1969 | 1962 | 1985 | 1965 | 1987 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -0.2 | 6.0 | 19.9 | 34.3 | 46.1 | 55.8 | 60.3 | 57.2 | 47.9 | 36.4 | 23.3 | 7.0 | 32.8 |
| Highest Mean Min. Temperature (F) | 16.3 | 19.2 | 32.4 | 41.2 | 54.5 | 61.3 | 65.1 | 62.9 | 53.8 | 46.0 | 28.4 | 18.7 | 37.1 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1971 | 1983 | 1983 | 1990 | 1963 | 1983 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -12.9 | -5.7 | 5.8 | 29.4 | 38.7 | 49.0 | 56.2 | 52.5 | 41.6 | 30.5 | 14.6 | -10.2 | 30.6 |
| Year Lowest Occurred | 1977 | 1979 | 1965 | 1961 | 1966 | 1969 | 1971 | 1964 | 1974 | 1988 | 1976 | 1983 | 1978 |
| Mean Precipitation (in.) | 0.98 | 0.97 | 2.28 | 2.97 | 3.65 | 4.11 | 4.21 | 4.20 | 3.56 | 2.45 | 1.72 | 1.32 | 32.42 |
| Highest Precipitation (in.) | 3.04 | 3.19 | 5.61 | 4.99 | 6.45 | 9.01 | 9.64 | 9.69 | 8.23 | 5.94 | 4.73 | 3.48 | 44.62 |
| Year Highest Occurred | 1969 | 1971 | 1985 | 1984 | 1982 | 1967 | 1979 | 1980 | 1968 | 1968 | 1983 | 1982 | 1983 |
| Lowest Precipitation (in.) | 0.06 | 0.00 | 0.76 | 0.41 | 1.56 | 0.98 | 0.36 | 0.47 | 0.71 | 0.20 | 0.00 | 0.11 | 17.43 |
| Year Lowest Occurred | 1961 | 1987 | 1968 | 1987 | 1989 | 1961 | 1975 | 1971 | 1967 | 1989 | 1967 | 1962 | 1976 |
| Heating Degree Days (F) | 1708. | 1378. | 1122. | 612. | 269. | 57. | 12. | 40. | 186. | 533. | 984. | 1522. | 8423. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 40. | 120. | 204. | 142. | 21. | 0. | 0. | 0. | 527. |