| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 21.0 | 26.2 | 38.5 | 55.8 | 69.7 | 79.4 | 85.1 | 82.6 | 72.5 | 60.3 | 41.0 | 25.5 | 54.8 |
| Highest Mean Max. Temperature (F) | 36.5 | 42.6 | 52.3 | 66.1 | 78.5 | 89.6 | 90.9 | 89.8 | 78.8 | 69.5 | 48.2 | 37.1 | 60.0 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1975 | 1983 | 1978 | 1963 | 1981 | 1986 | 1987 |
| Lowest Mean Max. Temperature (F) | 7.8 | 13.3 | 25.8 | 42.0 | 63.2 | 72.5 | 78.2 | 75.6 | 57.7 | 52.0 | 28.4 | 8.9 | 51.1 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1979 | 1969 | 1962 | 1985 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 10.0 | 15.2 | 28.3 | 43.6 | 56.9 | 66.8 | 72.2 | 69.8 | 59.2 | 47.4 | 30.8 | 15.5 | 43.0 |
| Highest Mean Temperature (F) | 26.3 | 31.5 | 37.7 | 51.0 | 65.3 | 74.3 | 77.2 | 75.8 | 63.9 | 56.7 | 36.9 | 25.6 | 47.7 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1974 | 1983 | 1978 | 1963 | 1962 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -3.7 | 1.3 | 16.1 | 35.3 | 49.9 | 60.2 | 68.6 | 64.0 | 49.2 | 41.7 | 19.1 | -0.1 | 38.9 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1979 | 1969 | 1962 | 1985 | 1965 | 1969 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -1.1 | 4.2 | 18.0 | 31.4 | 44.0 | 54.2 | 59.1 | 56.9 | 45.9 | 34.5 | 20.5 | 5.6 | 31.1 |
| Highest Mean Min. Temperature (F) | 16.0 | 20.4 | 27.5 | 37.8 | 52.1 | 61.9 | 64.0 | 62.5 | 50.5 | 43.9 | 26.6 | 17.3 | 35.3 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1971 | 1974 | 1961 | 1963 | 1963 | 1962 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -15.1 | -10.7 | 6.3 | 25.7 | 36.6 | 47.3 | 55.8 | 52.4 | 40.7 | 29.7 | 9.8 | -9.0 | 26.6 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1961 | 1979 | 1982 | 1985 | 1985 | 1965 | 1987 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.45 | 0.47 | 1.28 | 2.21 | 2.64 | 3.29 | 2.96 | 2.63 | 2.02 | 1.84 | 1.00 | 0.42 | 21.21 |
| Highest Precipitation (in.) | 1.69 | 1.79 | 6.04 | 6.24 | 6.71 | 7.89 | 7.33 | 6.76 | 4.70 | 6.04 | 3.58 | 1.05 | 34.51 |
| Year Highest Occurred | 1975 | 1962 | 1977 | 1986 | 1962 | 1984 | 1963 | 1966 | 1965 | 1971 | 1977 | 1984 | 1977 |
| Lowest Precipitation (in.) | 0.00 | 0.02 | 0.03 | 0.11 | 0.16 | 0.34 | 0.25 | 0.47 | 0.08 | 0.00 | 0.00 | 0.00 | 7.67 |
| Year Lowest Occurred | 1990 | 1968 | 1982 | 1982 | 1976 | 1987 | 1975 | 1969 | 1972 | 1964 | 1976 | 1989 | 1976 |
| Heating Degree Days (F) | 1705. | 1394. | 1138. | 642. | 275. | 69. | 12. | 39. | 194. | 546. | 1026. | 1535. | 8575. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 24. | 123. | 235. | 188. | 20. | 0. | 0. | 0. | 590. |