| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 18.7 | 24.5 | 36.5 | 51.9 | 64.9 | 73.2 | 78.2 | 75.1 | 65.7 | 54.8 | 37.6 | 22.5 | 50.3 |
| Highest Mean Max. Temperature (F) | 31.3 | 34.5 | 45.2 | 61.0 | 74.7 | 78.6 | 83.1 | 79.2 | 71.7 | 67.0 | 45.0 | 29.6 | 54.2 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1964 | 1988 | 1978 | 1963 | 1975 | 1974 | 1987 |
| Lowest Mean Max. Temperature (F) | 8.8 | 17.4 | 28.9 | 45.4 | 58.0 | 64.8 | 74.0 | 71.5 | 58.8 | 47.5 | 31.0 | 12.6 | 47.8 |
| Year Lowest Occurred | 1963 | 1989 | 1965 | 1983 | 1973 | 1969 | 1971 | 1985 | 1965 | 1987 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 7.1 | 11.7 | 25.3 | 40.5 | 52.2 | 60.6 | 65.6 | 62.9 | 54.2 | 44.1 | 29.0 | 12.9 | 38.8 |
| Highest Mean Temperature (F) | 19.5 | 24.0 | 35.5 | 46.7 | 60.3 | 64.4 | 69.3 | 67.7 | 59.9 | 52.8 | 33.5 | 22.5 | 43.5 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1987 | 1983 | 1983 | 1978 | 1963 | 1990 | 1987 | 1987 |
| Lowest Mean Temperature (F) | -2.8 | 3.5 | 17.1 | 34.3 | 45.3 | 54.1 | 61.3 | 58.8 | 49.2 | 37.6 | 20.2 | 2.0 | 36.2 |
| Year Lowest Occurred | 1977 | 1989 | 1965 | 1975 | 1967 | 1969 | 1971 | 1977 | 1965 | 1987 | 1976 | 1983 | 1972 |
| Mean Min. Temperature (F) | -4.5 | -1.0 | 14.0 | 29.1 | 39.6 | 48.0 | 52.9 | 50.6 | 42.7 | 33.3 | 20.3 | 3.2 | 27.4 |
| Highest Mean Min. Temperature (F) | 7.7 | 14.8 | 27.0 | 35.9 | 46.9 | 51.9 | 57.7 | 56.5 | 48.1 | 42.5 | 26.4 | 16.1 | 32.7 |
| Year Highest Occurred | 1990 | 1983 | 1973 | 1986 | 1962 | 1984 | 1983 | 1983 | 1978 | 1971 | 1988 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -16.1 | -10.4 | 4.0 | 23.0 | 32.0 | 41.5 | 47.8 | 44.2 | 35.9 | 24.5 | 8.2 | -9.8 | 23.6 |
| Year Lowest Occurred | 1977 | 1989 | 1969 | 1975 | 1967 | 1982 | 1962 | 1963 | 1976 | 1976 | 1976 | 1976 | 1976 |
| Mean Precipitation (in.) | 0.90 | 0.68 | 1.50 | 2.39 | 3.44 | 4.01 | 3.73 | 4.22 | 4.29 | 2.65 | 1.72 | 1.20 | 30.73 |
| Highest Precipitation (in.) | 2.86 | 1.96 | 4.20 | 4.38 | 8.41 | 11.79 | 7.75 | 8.24 | 9.55 | 4.77 | 4.48 | 2.83 | 41.03 |
| Year Highest Occurred | 1967 | 1971 | 1966 | 1977 | 1973 | 1968 | 1978 | 1962 | 1985 | 1979 | 1975 | 1984 | 1968 |
| Lowest Precipitation (in.) | 0.05 | 0.04 | 0.21 | 0.11 | 0.57 | 1.31 | 1.51 | 0.88 | 0.66 | 0.59 | 0.23 | 0.31 | 16.77 |
| Year Lowest Occurred | 1981 | 1969 | 1978 | 1980 | 1986 | 1983 | 1964 | 1968 | 1976 | 1964 | 1976 | 1986 | 1976 |
| Heating Degree Days (F) | 1795. | 1492. | 1231. | 735. | 413. | 156. | 63. | 113. | 324. | 648. | 1080. | 1615. | 9665. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 16. | 24. | 81. | 48. | 0. | 0. | 0. | 0. | 169. |