| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 18.5 | 24.8 | 37.6 | 55.0 | 68.4 | 77.4 | 82.6 | 79.4 | 69.1 | 57.4 | 39.0 | 23.1 | 52.7 |
| Highest Mean Max. Temperature (F) | 33.1 | 39.5 | 47.9 | 66.7 | 78.5 | 87.1 | 89.6 | 86.0 | 75.4 | 69.1 | 46.9 | 32.2 | 58.0 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1963 | 1963 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 8.1 | 16.3 | 26.3 | 44.0 | 61.7 | 68.2 | 76.7 | 73.7 | 58.4 | 52.0 | 29.3 | 9.1 | 49.2 |
| Year Lowest Occurred | 1979 | 1989 | 1965 | 1975 | 1968 | 1969 | 1962 | 1985 | 1965 | 1972 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 8.1 | 14.3 | 27.6 | 43.5 | 55.9 | 64.8 | 70.1 | 67.1 | 57.3 | 45.9 | 29.7 | 14.1 | 41.5 |
| Highest Mean Temperature (F) | 22.0 | 28.9 | 37.3 | 50.9 | 64.4 | 71.1 | 74.6 | 73.4 | 62.4 | 55.6 | 35.4 | 24.1 | 46.4 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1978 | 1963 | 1981 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -3.1 | 4.6 | 15.2 | 36.3 | 49.9 | 57.0 | 65.1 | 63.3 | 49.4 | 40.1 | 21.1 | -0.4 | 38.8 |
| Year Lowest Occurred | 1982 | 1989 | 1965 | 1975 | 1967 | 1969 | 1971 | 1977 | 1965 | 1976 | 1985 | 1983 | 1972 |
| Mean Min. Temperature (F) | -2.4 | 3.8 | 17.6 | 32.0 | 43.4 | 52.2 | 57.6 | 54.8 | 45.4 | 34.4 | 20.3 | 5.0 | 30.3 |
| Highest Mean Min. Temperature (F) | 10.9 | 18.3 | 28.7 | 38.2 | 50.5 | 56.1 | 62.0 | 60.8 | 49.4 | 42.0 | 26.6 | 17.3 | 34.9 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1971 | 1983 | 1983 | 1978 | 1963 | 1983 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -14.5 | -7.2 | 4.0 | 26.1 | 37.0 | 45.7 | 52.9 | 50.5 | 38.4 | 27.2 | 12.3 | -9.9 | 28.0 |
| Year Lowest Occurred | 1982 | 1967 | 1965 | 1961 | 1967 | 1969 | 1971 | 1967 | 1974 | 1976 | 1976 | 1983 | 1976 |
| Mean Precipitation (in.) | 0.74 | 0.63 | 1.41 | 2.35 | 3.16 | 4.60 | 3.11 | 3.96 | 3.16 | 2.21 | 1.27 | 0.83 | 27.43 |
| Highest Precipitation (in.) | 2.52 | 1.67 | 3.43 | 5.55 | 8.01 | 10.52 | 7.53 | 7.01 | 9.48 | 6.16 | 3.74 | 2.04 | 39.32 |
| Year Highest Occurred | 1969 | 1979 | 1965 | 1986 | 1962 | 1990 | 1986 | 1980 | 1985 | 1971 | 1977 | 1969 | 1965 |
| Lowest Precipitation (in.) | 0.06 | 0.04 | 0.31 | 0.05 | 0.82 | 0.05 | 0.21 | 0.60 | 0.95 | 0.14 | 0.14 | 0.13 | 14.93 |
| Year Lowest Occurred | 1990 | 1964 | 1971 | 1987 | 1967 | 1988 | 1975 | 1976 | 1966 | 1978 | 1976 | 1962 | 1976 |
| Heating Degree Days (F) | 1764. | 1420. | 1159. | 645. | 307. | 87. | 23. | 54. | 240. | 592. | 1059. | 1578. | 8928. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 25. | 81. | 181. | 119. | 9. | 0. | 0. | 0. | 415. |