| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 22.9 | 27.9 | 39.5 | 55.6 | 69.1 | 77.6 | 82.0 | 79.2 | 70.2 | 58.6 | 41.7 | 27.0 | 54.3 |
| Highest Mean Max. Temperature (F) | 33.5 | 36.9 | 50.0 | 64.5 | 79.5 | 83.9 | 87.2 | 84.2 | 74.1 | 70.9 | 49.2 | 34.0 | 56.5 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1976 | 1969 | 1978 | 1963 | 1975 | 1965 | 1987 |
| Lowest Mean Max. Temperature (F) | 13.5 | 20.7 | 31.1 | 48.0 | 60.2 | 68.9 | 78.5 | 75.5 | 66.6 | 50.7 | 33.7 | 17.0 | 51.8 |
| Year Lowest Occurred | 1963 | 1979 | 1984 | 1975 | 1983 | 1969 | 1990 | 1985 | 1965 | 1987 | 1985 | 1989 | 1989 |
| Mean Temperature (F) | 12.5 | 17.3 | 28.7 | 43.6 | 55.7 | 64.5 | 69.2 | 66.7 | 58.1 | 47.4 | 32.8 | 18.0 | 42.9 |
| Highest Mean Temperature (F) | 22.0 | 26.5 | 38.6 | 49.7 | 64.0 | 69.4 | 72.9 | 70.6 | 62.1 | 57.6 | 39.0 | 27.0 | 45.7 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1971 | 1966 | 1983 | 1978 | 1963 | 1975 | 1965 | 1987 |
| Lowest Mean Temperature (F) | 3.0 | 9.2 | 18.5 | 37.4 | 49.2 | 58.2 | 66.2 | 62.6 | 52.6 | 40.2 | 25.2 | 6.0 | 38.4 |
| Year Lowest Occurred | 1977 | 1979 | 1989 | 1975 | 1983 | 1982 | 1985 | 1977 | 1989 | 1988 | 1989 | 1989 | 1989 |
| Mean Min. Temperature (F) | 2.0 | 6.5 | 17.9 | 31.6 | 42.3 | 51.4 | 56.4 | 54.1 | 46.0 | 36.1 | 23.8 | 9.0 | 31.4 |
| Highest Mean Min. Temperature (F) | 10.7 | 17.5 | 29.0 | 35.8 | 50.0 | 56.4 | 60.3 | 58.7 | 50.2 | 45.7 | 28.7 | 19.9 | 35.4 |
| Year Highest Occurred | 1964 | 1983 | 1973 | 1985 | 1962 | 1971 | 1983 | 1973 | 1971 | 1971 | 1975 | 1965 | 1973 |
| Lowest Mean Min. Temperature (F) | -9.2 | -2.4 | 3.4 | 26.7 | 36.5 | 44.7 | 51.9 | 49.0 | 34.8 | 29.4 | 14.2 | -5.1 | 25.1 |
| Year Lowest Occurred | 1982 | 1979 | 1989 | 1975 | 1989 | 1982 | 1989 | 1977 | 1989 | 1989 | 1989 | 1989 | 1989 |
| Mean Precipitation (in.) | 1.06 | 0.97 | 1.97 | 2.90 | 3.66 | 3.76 | 3.87 | 4.20 | 4.21 | 2.63 | 2.19 | 1.49 | 32.91 |
| Highest Precipitation (in.) | 3.14 | 3.64 | 4.39 | 5.03 | 8.94 | 8.46 | 7.94 | 10.15 | 9.14 | 6.63 | 4.90 | 3.00 | 40.29 |
| Year Highest Occurred | 1980 | 1971 | 1966 | 1981 | 1970 | 1969 | 1978 | 1980 | 1965 | 1984 | 1975 | 1972 | 1961 |
| Lowest Precipitation (in.) | 0.05 | 0.00 | 0.36 | 0.55 | 1.25 | 0.81 | 1.04 | 1.22 | 0.58 | 0.48 | 0.00 | 0.40 | 21.83 |
| Year Lowest Occurred | 1981 | 1964 | 1978 | 1989 | 1986 | 1976 | 1962 | 1976 | 1976 | 1964 | 1976 | 1989 | 1976 |
| Heating Degree Days (F) | 1628. | 1336. | 1125. | 642. | 317. | 91. | 23. | 49. | 214. | 551. | 966. | 1457. | 8399. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 29. | 76. | 153. | 101. | 7. | 6. | 0. | 0. | 372. |