| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 17.4 | 24.1 | 36.7 | 53.8 | 66.7 | 76.4 | 81.6 | 78.7 | 67.9 | 56.7 | 38.4 | 22.0 | 51.7 |
| Highest Mean Max. Temperature (F) | 31.9 | 39.2 | 48.1 | 67.6 | 77.5 | 86.8 | 89.3 | 85.6 | 73.8 | 66.8 | 45.9 | 29.2 | 58.1 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1988 | 1969 | 1976 | 1963 | 1963 | 1987 | 1987 |
| Lowest Mean Max. Temperature (F) | 6.3 | 13.2 | 26.4 | 42.8 | 58.9 | 69.9 | 76.7 | 72.5 | 57.2 | 50.8 | 29.9 | 8.0 | 47.6 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1979 | 1969 | 1978 | 1985 | 1965 | 1981 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 6.8 | 12.6 | 26.3 | 42.6 | 54.7 | 64.6 | 69.7 | 66.7 | 56.2 | 45.2 | 29.3 | 12.8 | 40.6 |
| Highest Mean Temperature (F) | 21.0 | 29.5 | 36.2 | 53.0 | 63.4 | 71.6 | 74.5 | 70.6 | 60.4 | 53.9 | 36.2 | 22.5 | 47.5 |
| Year Highest Occurred | 1990 | 1987 | 1987 | 1987 | 1977 | 1988 | 1988 | 1983 | 1987 | 1963 | 1987 | 1987 | 1987 |
| Lowest Mean Temperature (F) | -7.3 | 1.5 | 15.5 | 34.4 | 48.3 | 57.7 | 65.3 | 63.5 | 48.9 | 40.5 | 21.7 | -2.2 | 37.3 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1967 | 1969 | 1962 | 1977 | 1965 | 1976 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -3.9 | 1.0 | 15.9 | 31.3 | 42.6 | 52.7 | 57.7 | 54.6 | 44.5 | 33.6 | 20.0 | 3.6 | 29.5 |
| Highest Mean Min. Temperature (F) | 11.2 | 19.7 | 27.0 | 38.3 | 50.7 | 58.6 | 62.4 | 59.8 | 48.8 | 40.9 | 27.6 | 15.7 | 36.9 |
| Year Highest Occurred | 1987 | 1987 | 1987 | 1987 | 1977 | 1990 | 1987 | 1984 | 1987 | 1963 | 1987 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -20.8 | -10.3 | 4.6 | 25.9 | 34.8 | 45.5 | 53.7 | 49.8 | 39.1 | 26.6 | 12.1 | -12.4 | 26.4 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1967 | 1969 | 1962 | 1967 | 1974 | 1976 | 1976 | 1983 | 1978 |
| Mean Precipitation (in.) | 0.80 | 0.72 | 1.51 | 2.38 | 3.33 | 4.67 | 3.74 | 3.92 | 3.30 | 2.36 | 1.46 | 1.08 | 29.27 |
| Highest Precipitation (in.) | 2.94 | 2.46 | 4.76 | 5.55 | 6.93 | 10.57 | 9.14 | 7.00 | 7.82 | 6.89 | 3.43 | 3.51 | 42.99 |
| Year Highest Occurred | 1969 | 1971 | 1965 | 1986 | 1962 | 1984 | 1972 | 1965 | 1985 | 1971 | 1977 | 1968 | 1965 |
| Lowest Precipitation (in.) | 0.05 | 0.02 | 0.30 | 0.10 | 1.20 | 0.69 | 0.94 | 1.32 | 0.61 | 0.22 | 0.07 | 0.05 | 13.09 |
| Year Lowest Occurred | 1974 | 1964 | 1974 | 1987 | 1976 | 1988 | 1976 | 1976 | 1976 | 1976 | 1976 | 1980 | 1976 |
| Heating Degree Days (F) | 1804. | 1467. | 1200. | 672. | 340. | 101. | 29. | 54. | 270. | 614. | 1071. | 1618. | 9240. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 21. | 89. | 175. | 107. | 6. | 0. | 0. | 0. | 398. |