| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 18.2 | 25.0 | 37.7 | 54.5 | 67.4 | 76.9 | 82.0 | 79.0 | 68.1 | 56.9 | 38.4 | 22.5 | 52.2 |
| Highest Mean Max. Temperature (F) | 33.1 | 38.4 | 48.4 | 68.0 | 78.3 | 85.6 | 88.7 | 85.2 | 73.9 | 63.8 | 45.1 | 30.7 | 58.5 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1988 | 1976 | 1976 | 1963 | 1990 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 8.7 | 16.9 | 27.9 | 44.6 | 61.2 | 69.3 | 76.7 | 71.6 | 57.5 | 51.9 | 29.9 | 11.3 | 48.5 |
| Year Lowest Occurred | 1977 | 1989 | 1965 | 1975 | 1979 | 1969 | 1962 | 1985 | 1965 | 1987 | 1985 | 1983 | 1985 |
| Mean Temperature (F) | 5.5 | 11.6 | 25.8 | 42.1 | 54.0 | 63.5 | 68.6 | 65.7 | 55.2 | 44.2 | 28.1 | 11.6 | 39.7 |
| Highest Mean Temperature (F) | 19.5 | 23.5 | 35.3 | 49.4 | 62.5 | 67.6 | 73.1 | 70.3 | 59.4 | 53.6 | 34.3 | 21.6 | 42.7 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1977 | 1977 | 1963 | 1966 | 1961 | 1990 | 1963 | 1963 | 1965 | 1987 |
| Lowest Mean Temperature (F) | -8.6 | 2.2 | 15.6 | 35.4 | 48.9 | 57.6 | 63.9 | 60.2 | 45.6 | 37.8 | 18.0 | -5.8 | 35.2 |
| Year Lowest Occurred | 1982 | 1989 | 1965 | 1975 | 1983 | 1982 | 1984 | 1986 | 1984 | 1987 | 1985 | 1983 | 1985 |
| Mean Min. Temperature (F) | -7.4 | -1.9 | 13.7 | 29.6 | 40.6 | 50.1 | 55.1 | 52.3 | 42.3 | 31.4 | 17.7 | 0.6 | 27.0 |
| Highest Mean Min. Temperature (F) | 5.8 | 11.1 | 25.3 | 35.6 | 47.8 | 55.8 | 60.8 | 58.1 | 48.6 | 43.4 | 25.7 | 13.8 | 31.0 |
| Year Highest Occurred | 1990 | 1983 | 1973 | 1977 | 1962 | 1963 | 1966 | 1973 | 1963 | 1963 | 1963 | 1965 | 1963 |
| Lowest Mean Min. Temperature (F) | -26.4 | -14.5 | 3.2 | 23.8 | 34.1 | 41.3 | 46.0 | 44.2 | 29.0 | 23.7 | 5.6 | -22.8 | 21.0 |
| Year Lowest Occurred | 1982 | 1985 | 1965 | 1982 | 1984 | 1988 | 1988 | 1987 | 1984 | 1987 | 1984 | 1983 | 1984 |
| Mean Precipitation (in.) | 0.82 | 0.70 | 1.63 | 2.23 | 3.45 | 4.21 | 3.65 | 3.64 | 3.30 | 2.51 | 1.46 | 1.01 | 28.61 |
| Highest Precipitation (in.) | 2.91 | 1.97 | 4.32 | 5.68 | 7.67 | 8.95 | 9.02 | 6.22 | 7.67 | 8.49 | 3.79 | 2.98 | 41.41 |
| Year Highest Occurred | 1975 | 1971 | 1977 | 1986 | 1962 | 1984 | 1972 | 1977 | 1986 | 1971 | 1975 | 1968 | 1977 |
| Lowest Precipitation (in.) | 0.09 | 0.03 | 0.25 | 0.07 | 1.35 | 0.91 | 1.05 | 0.72 | 0.44 | 0.23 | 0.08 | 0.15 | 14.62 |
| Year Lowest Occurred | 1981 | 1964 | 1987 | 1987 | 1967 | 1987 | 1967 | 1976 | 1976 | 1976 | 1967 | 1975 | 1976 |
| Heating Degree Days (F) | 1845. | 1495. | 1215. | 687. | 354. | 100. | 35. | 78. | 305. | 645. | 1107. | 1655. | 9521. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 13. | 55. | 147. | 99. | 11. | 0. | 0. | 0. | 325. |