| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 20.8 | 26.4 | 38.0 | 53.9 | 67.6 | 75.9 | 81.0 | 77.9 | 67.8 | 56.4 | 39.6 | 24.9 | 52.5 |
| Highest Mean Max. Temperature (F) | 31.5 | 35.6 | 46.7 | 61.1 | 77.7 | 81.3 | 85.6 | 82.9 | 71.7 | 68.1 | 47.4 | 32.3 | 55.8 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1966 | 1969 | 1978 | 1963 | 1975 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 11.2 | 18.6 | 30.4 | 48.1 | 60.0 | 68.0 | 75.6 | 73.7 | 61.1 | 49.1 | 33.1 | 15.5 | 50.0 |
| Year Lowest Occurred | 1963 | 1989 | 1965 | 1965 | 1983 | 1969 | 1978 | 1986 | 1974 | 1987 | 1985 | 1989 | 1979 |
| Mean Temperature (F) | 9.6 | 14.1 | 27.1 | 42.2 | 54.5 | 63.2 | 68.2 | 65.4 | 55.9 | 45.4 | 30.9 | 15.6 | 41.0 |
| Highest Mean Temperature (F) | 20.9 | 25.5 | 37.2 | 46.9 | 61.7 | 68.2 | 72.5 | 69.8 | 59.6 | 55.8 | 36.6 | 24.6 | 44.5 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1986 | 1977 | 1971 | 1970 | 1969 | 1970 | 1963 | 1975 | 1987 | 1987 |
| Lowest Mean Temperature (F) | -2.4 | 5.9 | 20.6 | 37.1 | 48.2 | 56.3 | 63.9 | 60.0 | 48.1 | 38.7 | 22.6 | 5.1 | 38.5 |
| Year Lowest Occurred | 1977 | 1979 | 1965 | 1982 | 1983 | 1982 | 1971 | 1977 | 1974 | 1987 | 1976 | 1989 | 1979 |
| Mean Min. Temperature (F) | -1.6 | 1.7 | 16.0 | 30.5 | 41.3 | 50.3 | 55.3 | 52.8 | 43.9 | 34.3 | 22.1 | 6.3 | 29.4 |
| Highest Mean Min. Temperature (F) | 10.2 | 15.7 | 27.7 | 35.4 | 47.7 | 55.3 | 59.5 | 58.0 | 48.9 | 43.5 | 27.9 | 18.6 | 33.2 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1986 | 1964 | 1970 | 1970 | 1988 | 1970 | 1971 | 1963 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -16.4 | -8.2 | 9.6 | 25.0 | 36.2 | 42.0 | 49.5 | 45.9 | 35.1 | 25.0 | 11.3 | -7.4 | 24.7 |
| Year Lowest Occurred | 1977 | 1979 | 1989 | 1982 | 1967 | 1982 | 1971 | 1977 | 1974 | 1976 | 1976 | 1976 | 1976 |
| Mean Precipitation (in.) | 1.02 | 0.91 | 1.89 | 2.69 | 3.46 | 3.76 | 3.80 | 4.01 | 4.48 | 2.61 | 2.06 | 1.52 | 32.21 |
| Highest Precipitation (in.) | 3.35 | 2.53 | 4.35 | 4.38 | 6.77 | 8.36 | 9.41 | 8.62 | 8.69 | 5.11 | 4.67 | 3.45 | 42.04 |
| Year Highest Occurred | 1967 | 1962 | 1976 | 1975 | 1968 | 1967 | 1978 | 1962 | 1986 | 1979 | 1985 | 1972 | 1968 |
| Lowest Precipitation (in.) | 0.05 | 0.05 | 0.23 | 0.81 | 1.10 | 1.07 | 1.51 | 1.06 | 0.56 | 0.31 | 0.14 | 0.44 | 20.44 |
| Year Lowest Occurred | 1981 | 1987 | 1978 | 1971 | 1986 | 1976 | 1973 | 1970 | 1979 | 1976 | 1967 | 1976 | 1989 |
| Heating Degree Days (F) | 1717. | 1425. | 1175. | 684. | 348. | 118. | 35. | 73. | 279. | 608. | 1023. | 1531. | 9016. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 22. | 64. | 134. | 85. | 6. | 0. | 0. | 0. | 311. |