| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 19.3 | 23.6 | 35.1 | 49.6 | 63.7 | 72.9 | 78.2 | 74.6 | 64.9 | 53.7 | 36.8 | 23.5 | 49.7 |
| Highest Mean Max. Temperature (F) | 31.6 | 35.1 | 44.2 | 60.1 | 73.0 | 79.0 | 83.1 | 80.1 | 71.7 | 67.0 | 43.7 | 29.5 | 54.4 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1987 | 1975 | 1969 | 1978 | 1963 | 1977 | 1987 | 1987 |
| Lowest Mean Max. Temperature (F) | 9.0 | 15.3 | 25.8 | 42.5 | 56.1 | 63.1 | 72.2 | 69.6 | 58.2 | 44.5 | 30.3 | 14.9 | 46.1 |
| Year Lowest Occurred | 1963 | 1979 | 1984 | 1982 | 1979 | 1969 | 1971 | 1982 | 1974 | 1980 | 1985 | 1985 | 1972 |
| Mean Temperature (F) | 10.0 | 12.5 | 24.3 | 38.3 | 50.8 | 59.8 | 65.5 | 62.5 | 53.9 | 44.0 | 29.5 | 15.4 | 38.9 |
| Highest Mean Temperature (F) | 22.4 | 24.0 | 33.6 | 44.5 | 59.8 | 65.3 | 70.4 | 67.3 | 58.1 | 53.2 | 36.0 | 23.2 | 43.1 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1987 | 1977 | 1987 | 1983 | 1983 | 1978 | 1963 | 1977 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -1.1 | 3.6 | 11.6 | 30.2 | 43.0 | 50.8 | 61.0 | 57.7 | 47.8 | 36.4 | 23.8 | 5.8 | 35.6 |
| Year Lowest Occurred | 1982 | 1979 | 1984 | 1982 | 1966 | 1982 | 1962 | 1982 | 1974 | 1980 | 1985 | 1985 | 1982 |
| Mean Min. Temperature (F) | 0.7 | 1.3 | 13.4 | 26.9 | 37.8 | 46.7 | 52.8 | 50.4 | 43.0 | 34.2 | 22.1 | 7.3 | 28.1 |
| Highest Mean Min. Temperature (F) | 13.2 | 14.2 | 25.6 | 32.0 | 46.7 | 51.9 | 58.0 | 55.0 | 47.6 | 42.9 | 28.2 | 17.1 | 31.8 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1990 | 1977 | 1984 | 1983 | 1973 | 1983 | 1973 | 1977 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -12.3 | -8.9 | -2.6 | 17.9 | 29.1 | 36.7 | 47.0 | 45.7 | 37.4 | 26.8 | 14.6 | -3.7 | 24.9 |
| Year Lowest Occurred | 1982 | 1963 | 1984 | 1982 | 1966 | 1982 | 1962 | 1982 | 1974 | 1976 | 1976 | 1989 | 1982 |
| Mean Precipitation (in.) | 1.54 | 1.14 | 1.80 | 2.45 | 3.62 | 3.86 | 3.06 | 3.80 | 3.92 | 3.00 | 2.48 | 2.13 | 32.80 |
| Highest Precipitation (in.) | 6.84 | 2.78 | 6.13 | 7.78 | 7.17 | 8.11 | 7.80 | 8.67 | 7.59 | 6.38 | 4.78 | 8.28 | 55.44 |
| Year Highest Occurred | 1967 | 1971 | 1977 | 1967 | 1964 | 1968 | 1982 | 1978 | 1968 | 1979 | 1975 | 1968 | 1967 |
| Lowest Precipitation (in.) | 0.32 | 0.20 | 0.32 | 0.86 | 0.07 | 1.76 | 0.47 | 0.77 | 0.87 | 0.74 | 0.54 | 0.46 | 18.05 |
| Year Lowest Occurred | 1961 | 1987 | 1980 | 1987 | 1986 | 1982 | 1976 | 1970 | 1989 | 1964 | 1981 | 1986 | 1976 |
| Heating Degree Days (F) | 1705. | 1470. | 1262. | 801. | 455. | 192. | 77. | 125. | 333. | 651. | 1065. | 1538. | 9674. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 15. | 36. | 93. | 47. | 0. | 0. | 0. | 0. | 191. |