| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 27.5 | 33.0 | 38.7 | 47.9 | 59.1 | 69.5 | 79.6 | 77.6 | 66.5 | 54.4 | 38.2 | 28.5 | 51.7 |
| Highest Mean Max. Temperature (F) | 39.4 | 39.5 | 48.4 | 60.6 | 66.4 | 78.0 | 84.0 | 83.4 | 75.7 | 64.0 | 46.5 | 36.1 | 54.9 |
| Year Highest Occurred | 1981 | 1977 | 1986 | 1987 | 1969 | 1988 | 1989 | 1971 | 1990 | 1988 | 1981 | 1980 | 1987 |
| Lowest Mean Max. Temperature (F) | 17.8 | 23.1 | 31.4 | 35.2 | 51.4 | 63.3 | 73.8 | 70.1 | 55.2 | 46.3 | 27.7 | 18.4 | 47.8 |
| Year Lowest Occurred | 1979 | 1989 | 1965 | 1975 | 1975 | 1981 | 1987 | 1968 | 1961 | 1969 | 1985 | 1990 | 1975 |
| Mean Temperature (F) | 17.9 | 22.7 | 27.5 | 36.7 | 46.7 | 55.7 | 63.5 | 61.6 | 51.8 | 41.5 | 28.8 | 19.2 | 39.5 |
| Highest Mean Temperature (F) | 28.6 | 28.7 | 38.7 | 45.1 | 51.3 | 63.3 | 67.8 | 66.8 | 58.9 | 48.8 | 35.9 | 28.0 | 42.1 |
| Year Highest Occurred | 1981 | 1963 | 1986 | 1987 | 1987 | 1988 | 1989 | 1971 | 1990 | 1988 | 1981 | 1980 | 1981 |
| Lowest Mean Temperature (F) | 6.7 | 12.0 | 14.4 | 26.6 | 41.8 | 51.9 | 59.6 | 56.4 | 44.1 | 34.9 | 19.4 | 9.0 | 36.6 |
| Year Lowest Occurred | 1963 | 1989 | 1965 | 1975 | 1975 | 1975 | 1962 | 1968 | 1961 | 1969 | 1985 | 1990 | 1975 |
| Mean Min. Temperature (F) | 8.2 | 12.3 | 16.4 | 25.5 | 34.3 | 41.7 | 47.3 | 45.6 | 37.0 | 28.5 | 19.2 | 9.8 | 27.2 |
| Highest Mean Min. Temperature (F) | 18.0 | 20.0 | 29.0 | 29.6 | 37.9 | 48.5 | 51.5 | 50.2 | 42.9 | 33.5 | 25.3 | 19.8 | 30.2 |
| Year Highest Occurred | 1983 | 1961 | 1986 | 1985 | 1980 | 1988 | 1989 | 1983 | 1963 | 1988 | 1981 | 1980 | 1986 |
| Lowest Mean Min. Temperature (F) | -4.8 | 0.9 | -2.7 | 18.0 | 30.3 | 37.4 | 43.2 | 40.6 | 29.9 | 23.4 | 11.0 | -0.4 | 24.3 |
| Year Lowest Occurred | 1963 | 1989 | 1965 | 1975 | 1966 | 1976 | 1965 | 1976 | 1965 | 1969 | 1985 | 1990 | 1965 |
| Mean Precipitation (in.) | 1.14 | 0.72 | 1.01 | 1.00 | 1.93 | 1.94 | 1.54 | 1.53 | 1.41 | 1.04 | 1.08 | 1.00 | 15.34 |
| Highest Precipitation (in.) | 3.81 | 1.84 | 3.05 | 2.11 | 3.61 | 3.96 | 3.57 | 4.21 | 3.66 | 2.53 | 2.23 | 3.20 | 20.52 |
| Year Highest Occurred | 1968 | 1978 | 1974 | 1982 | 1988 | 1968 | 1987 | 1982 | 1961 | 1967 | 1970 | 1964 | 1982 |
| Lowest Precipitation (in.) | 0.05 | 0.16 | 0.12 | 0.07 | 0.12 | 0.43 | 0.37 | 0.14 | 0.05 | 0.00 | 0.29 | 0.02 | 11.08 |
| Year Lowest Occurred | 1981 | 1977 | 1969 | 1979 | 1979 | 1961 | 1990 | 1988 | 1979 | 1987 | 1972 | 1986 | 1979 |
| Heating Degree Days (F) | 1460. | 1184. | 1163. | 849. | 567. | 290. | 93. | 153. | 406. | 729. | 1086. | 1420. | 9400. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 11. | 47. | 48. | 10. | 0. | 0. | 0. | 116. |