| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 19.2 | 25.2 | 36.9 | 52.1 | 65.2 | 73.1 | 77.7 | 74.8 | 65.2 | 54.3 | 37.4 | 23.1 | 50.4 |
| Highest Mean Max. Temperature (F) | 30.9 | 35.8 | 45.1 | 61.4 | 76.6 | 78.2 | 83.4 | 79.8 | 70.1 | 68.1 | 44.3 | 29.2 | 54.5 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1976 | 1988 | 1983 | 1978 | 1963 | 1975 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 8.8 | 18.3 | 28.2 | 46.0 | 59.1 | 64.5 | 73.6 | 70.8 | 59.2 | 47.7 | 31.1 | 13.4 | 47.7 |
| Year Lowest Occurred | 1963 | 1963 | 1965 | 1961 | 1966 | 1969 | 1978 | 1977 | 1965 | 1987 | 1976 | 1989 | 1972 |
| Mean Temperature (F) | 9.9 | 15.0 | 27.1 | 41.5 | 53.8 | 62.3 | 67.3 | 64.5 | 55.5 | 45.2 | 30.2 | 15.4 | 40.6 |
| Highest Mean Temperature (F) | 21.7 | 26.3 | 36.9 | 48.0 | 63.8 | 66.7 | 71.5 | 69.5 | 60.7 | 55.4 | 35.0 | 23.5 | 44.9 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1971 | 1983 | 1983 | 1978 | 1963 | 1975 | 1987 | 1987 |
| Lowest Mean Temperature (F) | 0.0 | 6.5 | 18.7 | 36.3 | 48.0 | 55.6 | 63.3 | 60.6 | 49.9 | 39.4 | 22.3 | 4.7 | 38.3 |
| Year Lowest Occurred | 1963 | 1963 | 1965 | 1975 | 1967 | 1969 | 1962 | 1977 | 1974 | 1988 | 1976 | 1989 | 1972 |
| Mean Min. Temperature (F) | 0.5 | 4.7 | 17.2 | 30.8 | 42.4 | 51.4 | 56.8 | 54.3 | 45.6 | 36.0 | 22.9 | 7.6 | 30.9 |
| Highest Mean Min. Temperature (F) | 12.5 | 18.5 | 28.8 | 35.4 | 50.9 | 55.5 | 61.1 | 59.1 | 51.3 | 43.6 | 27.0 | 18.1 | 35.2 |
| Year Highest Occurred | 1990 | 1983 | 1973 | 1977 | 1977 | 1971 | 1983 | 1983 | 1978 | 1971 | 1987 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -9.6 | -5.5 | 9.2 | 24.5 | 36.4 | 46.0 | 52.8 | 49.7 | 40.0 | 29.5 | 13.4 | -4.1 | 28.5 |
| Year Lowest Occurred | 1977 | 1989 | 1965 | 1982 | 1961 | 1982 | 1962 | 1963 | 1974 | 1976 | 1976 | 1989 | 1989 |
| Mean Precipitation (in.) | 1.16 | 0.84 | 1.82 | 2.39 | 3.53 | 3.96 | 3.73 | 4.41 | 4.01 | 2.85 | 2.01 | 1.50 | 32.21 |
| Highest Precipitation (in.) | 3.29 | 2.17 | 3.83 | 5.74 | 8.37 | 10.59 | 8.44 | 10.41 | 8.88 | 4.94 | 5.44 | 3.50 | 44.16 |
| Year Highest Occurred | 1967 | 1971 | 1979 | 1982 | 1970 | 1968 | 1969 | 1972 | 1985 | 1970 | 1975 | 1982 | 1968 |
| Lowest Precipitation (in.) | 0.17 | 0.10 | 0.17 | 0.74 | 0.94 | 1.69 | 1.71 | 0.91 | 1.02 | 0.43 | 0.30 | 0.43 | 22.35 |
| Year Lowest Occurred | 1981 | 1969 | 1978 | 1988 | 1966 | 1970 | 1989 | 1970 | 1976 | 1976 | 1981 | 1986 | 1976 |
| Heating Degree Days (F) | 1708. | 1400. | 1175. | 705. | 371. | 124. | 40. | 89. | 289. | 614. | 1044. | 1538. | 9097. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 24. | 43. | 111. | 73. | 0. | 0. | 0. | 0. | 251. |