| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 16.0 | 23.7 | 37.3 | 53.3 | 66.9 | 74.6 | 79.2 | 76.5 | 65.9 | 54.3 | 35.2 | 20.4 | 50.3 |
| Highest Mean Max. Temperature (F) | 28.6 | 36.1 | 45.1 | 66.4 | 77.0 | 82.7 | 84.2 | 82.5 | 71.2 | 68.0 | 43.5 | 30.0 | 54.8 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1988 | 1983 | 1976 | 1963 | 1981 | 1986 | 1987 |
| Lowest Mean Max. Temperature (F) | 3.6 | 15.0 | 28.5 | 44.9 | 59.2 | 68.1 | 73.5 | 69.9 | 57.8 | 47.7 | 26.8 | 10.5 | 46.7 |
| Year Lowest Occurred | 1979 | 1979 | 1965 | 1975 | 1974 | 1985 | 1972 | 1977 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 3.9 | 10.7 | 24.7 | 40.0 | 52.3 | 60.8 | 66.0 | 63.4 | 54.0 | 43.3 | 26.6 | 10.3 | 38.0 |
| Highest Mean Temperature (F) | 17.5 | 26.3 | 34.4 | 48.4 | 61.4 | 66.2 | 69.9 | 69.7 | 58.4 | 53.8 | 35.2 | 20.3 | 43.3 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1983 | 1983 | 1978 | 1963 | 1981 | 1987 | 1987 |
| Lowest Mean Temperature (F) | -8.4 | 0.3 | 12.9 | 33.3 | 45.7 | 54.4 | 60.5 | 58.0 | 45.6 | 37.1 | 17.8 | -1.0 | 34.6 |
| Year Lowest Occurred | 1979 | 1989 | 1965 | 1966 | 1967 | 1969 | 1962 | 1977 | 1965 | 1976 | 1985 | 1983 | 1965 |
| Mean Min. Temperature (F) | -8.1 | -2.3 | 12.2 | 26.6 | 37.7 | 47.0 | 52.8 | 50.3 | 42.1 | 32.3 | 17.9 | 0.1 | 25.7 |
| Highest Mean Min. Temperature (F) | 6.3 | 16.5 | 24.0 | 31.9 | 45.8 | 52.6 | 57.8 | 57.7 | 47.2 | 39.5 | 26.8 | 13.0 | 31.6 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1986 | 1977 | 1984 | 1989 | 1984 | 1978 | 1963 | 1981 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -22.3 | -14.8 | -2.7 | 21.2 | 30.1 | 40.3 | 46.1 | 45.1 | 33.4 | 25.1 | 8.7 | -12.5 | 20.8 |
| Year Lowest Occurred | 1982 | 1989 | 1965 | 1961 | 1967 | 1969 | 1962 | 1965 | 1965 | 1976 | 1985 | 1983 | 1965 |
| Mean Precipitation (in.) | 1.03 | 0.58 | 1.06 | 1.68 | 2.66 | 4.13 | 3.59 | 4.11 | 3.24 | 2.22 | 1.20 | 0.98 | 26.48 |
| Highest Precipitation (in.) | 3.96 | 1.98 | 2.82 | 3.88 | 5.24 | 7.62 | 8.64 | 9.84 | 8.56 | 5.54 | 3.82 | 2.67 | 34.33 |
| Year Highest Occurred | 1969 | 1971 | 1966 | 1968 | 1985 | 1968 | 1987 | 1988 | 1977 | 1970 | 1977 | 1968 | 1977 |
| Lowest Precipitation (in.) | 0.12 | 0.06 | 0.09 | 0.09 | 0.05 | 0.79 | 1.05 | 1.03 | 0.66 | 0.11 | 0.17 | 0.17 | 14.80 |
| Year Lowest Occurred | 1973 | 1988 | 1962 | 1976 | 1976 | 1987 | 1983 | 1965 | 1976 | 1978 | 1986 | 1985 | 1976 |
| Heating Degree Days (F) | 1894. | 1520. | 1249. | 750. | 409. | 156. | 72. | 119. | 335. | 673. | 1152. | 1696. | 10025. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 16. | 30. | 103. | 69. | 0. | 0. | 0. | 0. | 218. |