| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 19.4 | 24.6 | 35.5 | 49.2 | 62.6 | 72.9 | 79.4 | 76.4 | 66.3 | 55.4 | 38.2 | 23.7 | 50.3 |
| Highest Mean Max. Temperature (F) | 31.1 | 35.4 | 45.6 | 60.5 | 70.7 | 79.5 | 85.5 | 83.1 | 70.1 | 68.0 | 45.5 | 31.1 | 54.8 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1987 | 1988 | 1969 | 1976 | 1963 | 1963 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 9.6 | 15.5 | 28.5 | 35.8 | 54.2 | 66.2 | 72.7 | 69.6 | 59.9 | 48.0 | 30.1 | 13.7 | 46.2 |
| Year Lowest Occurred | 1982 | 1979 | 1974 | 1975 | 1970 | 1982 | 1972 | 1982 | 1965 | 1974 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 9.2 | 13.7 | 26.1 | 39.1 | 50.1 | 59.5 | 66.9 | 64.9 | 55.9 | 45.9 | 30.9 | 15.5 | 39.8 |
| Highest Mean Temperature (F) | 22.2 | 25.7 | 33.2 | 45.9 | 55.4 | 64.6 | 72.0 | 71.6 | 60.1 | 56.5 | 37.5 | 24.0 | 44.1 |
| Year Highest Occurred | 1990 | 1984 | 1968 | 1987 | 1977 | 1987 | 1983 | 1983 | 1961 | 1963 | 1981 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -1.2 | 4.8 | 18.8 | 29.8 | 44.5 | 54.8 | 61.8 | 60.0 | 50.8 | 39.0 | 23.7 | 4.8 | 36.3 |
| Year Lowest Occurred | 1977 | 1967 | 1965 | 1975 | 1967 | 1962 | 1965 | 1977 | 1974 | 1976 | 1985 | 1976 | 1972 |
| Mean Min. Temperature (F) | -1.0 | 2.8 | 16.6 | 29.0 | 37.6 | 46.1 | 54.3 | 53.3 | 45.3 | 36.3 | 23.6 | 7.2 | 29.3 |
| Highest Mean Min. Temperature (F) | 13.2 | 18.6 | 27.3 | 32.8 | 41.7 | 49.6 | 61.1 | 61.6 | 50.4 | 45.0 | 29.7 | 17.8 | 33.4 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1986 | 1982 | 1987 | 1983 | 1983 | 1961 | 1963 | 1981 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -12.6 | -9.5 | 9.0 | 23.7 | 32.4 | 42.7 | 48.5 | 47.7 | 39.6 | 26.7 | 16.1 | -6.7 | 26.3 |
| Year Lowest Occurred | 1977 | 1967 | 1965 | 1975 | 1967 | 1965 | 1965 | 1977 | 1974 | 1976 | 1976 | 1976 | 1972 |
| Mean Precipitation (in.) | 1.10 | 0.71 | 1.89 | 2.26 | 3.18 | 3.62 | 3.35 | 3.78 | 3.83 | 2.47 | 1.83 | 1.30 | 29.32 |
| Highest Precipitation (in.) | 3.36 | 2.62 | 4.21 | 4.79 | 6.25 | 7.54 | 10.39 | 7.22 | 11.04 | 7.20 | 6.34 | 3.35 | 38.74 |
| Year Highest Occurred | 1969 | 1981 | 1977 | 1968 | 1962 | 1984 | 1982 | 1978 | 1985 | 1970 | 1975 | 1968 | 1985 |
| Lowest Precipitation (in.) | 0.03 | 0.01 | 0.20 | 0.56 | 0.39 | 1.33 | 0.98 | 1.24 | 0.53 | 0.36 | 0.28 | 0.13 | 17.37 |
| Year Lowest Occurred | 1961 | 1969 | 1962 | 1988 | 1976 | 1987 | 1989 | 1961 | 1976 | 1976 | 1967 | 1979 | 1963 |
| Heating Degree Days (F) | 1730. | 1436. | 1206. | 777. | 462. | 183. | 58. | 92. | 277. | 592. | 1023. | 1535. | 9371. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 18. | 116. | 89. | 0. | 0. | 0. | 0. | 223. |