| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 17.4 | 24.0 | 37.0 | 54.3 | 68.7 | 77.4 | 82.8 | 80.3 | 69.7 | 57.3 | 37.7 | 22.3 | 52.4 |
| Highest Mean Max. Temperature (F) | 33.0 | 37.5 | 47.5 | 67.3 | 78.3 | 86.9 | 89.0 | 87.2 | 75.8 | 69.5 | 45.6 | 31.5 | 57.5 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1977 | 1988 | 1988 | 1983 | 1976 | 1963 | 1981 | 1986 | 1987 |
| Lowest Mean Max. Temperature (F) | 5.4 | 14.5 | 25.5 | 43.6 | 60.0 | 72.2 | 76.5 | 73.9 | 57.9 | 51.1 | 27.8 | 9.1 | 48.6 |
| Year Lowest Occurred | 1977 | 1979 | 1965 | 1975 | 1979 | 1985 | 1962 | 1977 | 1965 | 1969 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 6.7 | 12.9 | 26.6 | 43.0 | 56.7 | 66.0 | 71.3 | 68.9 | 58.7 | 47.0 | 29.4 | 13.0 | 41.7 |
| Highest Mean Temperature (F) | 22.6 | 28.4 | 36.4 | 53.2 | 65.9 | 73.8 | 76.5 | 75.7 | 64.5 | 57.8 | 37.1 | 22.8 | 47.5 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1978 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Temperature (F) | -5.0 | 2.4 | 13.3 | 35.4 | 49.5 | 59.5 | 65.5 | 63.5 | 49.6 | 42.1 | 18.8 | -0.9 | 38.0 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1979 | 1979 | 1969 | 1971 | 1977 | 1965 | 1969 | 1985 | 1983 | 1972 |
| Mean Min. Temperature (F) | -4.0 | 1.8 | 16.1 | 31.6 | 44.6 | 54.6 | 59.8 | 57.4 | 47.6 | 36.6 | 21.0 | 3.6 | 30.9 |
| Highest Mean Min. Temperature (F) | 12.1 | 19.2 | 27.4 | 39.0 | 53.4 | 60.6 | 64.9 | 64.1 | 53.7 | 46.0 | 28.5 | 14.6 | 37.3 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1983 | 1983 | 1978 | 1963 | 1981 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -17.1 | -9.7 | 1.0 | 25.6 | 36.9 | 46.7 | 54.4 | 52.8 | 41.3 | 30.2 | 9.8 | -10.8 | 27.4 |
| Year Lowest Occurred | 1966 | 1979 | 1965 | 1961 | 1967 | 1969 | 1971 | 1967 | 1974 | 1976 | 1985 | 1983 | 1972 |
| Mean Precipitation (in.) | 0.91 | 0.64 | 1.37 | 2.39 | 2.99 | 4.34 | 3.89 | 3.34 | 2.49 | 2.24 | 1.01 | 0.83 | 26.44 |
| Highest Precipitation (in.) | 2.51 | 2.55 | 3.27 | 5.02 | 7.00 | 7.64 | 8.94 | 7.24 | 7.54 | 6.42 | 3.86 | 2.29 | 41.16 |
| Year Highest Occurred | 1967 | 1979 | 1982 | 1986 | 1985 | 1979 | 1985 | 1988 | 1965 | 1982 | 1977 | 1968 | 1977 |
| Lowest Precipitation (in.) | 0.08 | 0.00 | 0.37 | 0.00 | 0.84 | 0.83 | 0.87 | 0.38 | 0.37 | 0.22 | 0.06 | 0.05 | 15.49 |
| Year Lowest Occurred | 1961 | 1983 | 1969 | 1980 | 1980 | 1987 | 1975 | 1976 | 1966 | 1976 | 1990 | 1989 | 1976 |
| Heating Degree Days (F) | 1807. | 1459. | 1190. | 660. | 296. | 73. | 23. | 44. | 212. | 558. | 1068. | 1612. | 9002. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 38. | 103. | 218. | 165. | 23. | 0. | 0. | 0. | 547. |