| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 14.0 | 20.7 | 34.6 | 53.8 | 68.8 | 77.0 | 82.2 | 80.1 | 69.0 | 56.3 | 35.4 | 19.3 | 50.9 |
| Highest Mean Max. Temperature (F) | 30.0 | 32.5 | 44.2 | 66.7 | 78.4 | 88.0 | 88.8 | 86.8 | 75.6 | 69.7 | 44.5 | 29.6 | 55.9 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1977 | 1988 | 1988 | 1983 | 1990 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 1.5 | 9.2 | 24.5 | 43.7 | 60.1 | 68.1 | 77.4 | 73.2 | 56.4 | 47.2 | 25.1 | 6.5 | 47.3 |
| Year Lowest Occurred | 1966 | 1979 | 1965 | 1979 | 1979 | 1969 | 1965 | 1977 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 3.7 | 10.2 | 24.7 | 42.5 | 55.8 | 64.6 | 69.6 | 67.2 | 56.9 | 45.2 | 27.0 | 10.1 | 39.8 |
| Highest Mean Temperature (F) | 19.5 | 24.6 | 36.4 | 51.9 | 65.6 | 71.8 | 74.1 | 73.5 | 61.7 | 57.0 | 36.6 | 21.4 | 44.2 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1990 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Temperature (F) | -8.6 | -1.4 | 13.7 | 34.7 | 48.7 | 56.6 | 66.1 | 60.9 | 48.1 | 39.1 | 15.9 | -1.1 | 36.9 |
| Year Lowest Occurred | 1966 | 1979 | 1970 | 1979 | 1967 | 1969 | 1972 | 1977 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -6.6 | -0.3 | 14.7 | 31.1 | 42.8 | 52.2 | 56.9 | 54.3 | 44.7 | 34.0 | 18.5 | 0.9 | 28.6 |
| Highest Mean Min. Temperature (F) | 8.9 | 17.8 | 28.6 | 37.1 | 52.7 | 57.7 | 62.0 | 60.1 | 49.6 | 44.2 | 28.6 | 13.1 | 32.4 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1987 | 1977 | 1963 | 1983 | 1983 | 1978 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Min. Temperature (F) | -19.9 | -13.5 | 0.6 | 25.6 | 35.4 | 45.0 | 53.1 | 48.6 | 39.2 | 26.2 | 6.7 | -9.7 | 26.4 |
| Year Lowest Occurred | 1982 | 1967 | 1970 | 1979 | 1967 | 1969 | 1967 | 1977 | 1974 | 1983 | 1985 | 1985 | 1978 |
| Mean Precipitation (in.) | 0.63 | 0.44 | 0.92 | 1.50 | 2.58 | 3.83 | 3.26 | 3.54 | 2.72 | 1.62 | 0.74 | 0.59 | 22.37 |
| Highest Precipitation (in.) | 1.67 | 1.64 | 2.09 | 4.81 | 7.48 | 10.89 | 7.74 | 8.41 | 8.25 | 5.52 | 2.87 | 1.22 | 36.50 |
| Year Highest Occurred | 1989 | 1977 | 1970 | 1986 | 1962 | 1981 | 1979 | 1980 | 1961 | 1982 | 1986 | 1970 | 1981 |
| Lowest Precipitation (in.) | 0.04 | 0.06 | 0.02 | 0.00 | 0.28 | 0.80 | 0.50 | 0.67 | 0.07 | 0.12 | 0.02 | 0.07 | 14.61 |
| Year Lowest Occurred | 1963 | 1965 | 1978 | 1988 | 1980 | 1988 | 1990 | 1967 | 1976 | 1976 | 1990 | 1986 | 1976 |
| Heating Degree Days (F) | 1900. | 1534. | 1249. | 675. | 317. | 99. | 17. | 74. | 258. | 614. | 1140. | 1702. | 9579. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 32. | 87. | 159. | 142. | 15. | 0. | 0. | 0. | 435. |