| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 20.2 | 26.4 | 38.8 | 56.4 | 70.4 | 79.2 | 83.8 | 81.0 | 71.1 | 59.1 | 39.9 | 24.1 | 54.2 |
| Highest Mean Max. Temperature (F) | 35.0 | 41.2 | 51.3 | 69.0 | 80.6 | 88.5 | 90.7 | 88.5 | 77.8 | 69.5 | 46.9 | 33.2 | 59.7 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1988 | 1988 | 1988 | 1983 | 1976 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 9.3 | 17.0 | 25.0 | 44.0 | 63.0 | 70.6 | 77.7 | 75.4 | 58.5 | 52.4 | 30.0 | 10.0 | 50.6 |
| Year Lowest Occurred | 1966 | 1989 | 1965 | 1975 | 1967 | 1969 | 1962 | 1966 | 1965 | 1969 | 1985 | 1983 | 1965 |
| Mean Temperature (F) | 9.8 | 15.8 | 28.9 | 45.0 | 58.2 | 67.6 | 72.5 | 69.7 | 59.9 | 48.2 | 31.4 | 15.3 | 43.5 |
| Highest Mean Temperature (F) | 24.5 | 31.1 | 38.4 | 54.5 | 66.6 | 75.1 | 77.6 | 76.9 | 66.1 | 58.0 | 37.4 | 24.7 | 48.9 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1963 | 1981 | 1979 | 1987 |
| Lowest Mean Temperature (F) | -1.5 | 5.8 | 15.4 | 36.6 | 51.0 | 59.9 | 67.3 | 65.9 | 51.0 | 43.7 | 21.8 | 0.8 | 40.7 |
| Year Lowest Occurred | 1982 | 1979 | 1965 | 1975 | 1967 | 1969 | 1971 | 1985 | 1965 | 1976 | 1985 | 1983 | 1972 |
| Mean Min. Temperature (F) | -0.7 | 5.2 | 18.9 | 33.6 | 46.1 | 55.9 | 61.1 | 58.3 | 48.7 | 37.2 | 22.8 | 6.5 | 32.8 |
| Highest Mean Min. Temperature (F) | 13.9 | 20.9 | 29.8 | 40.0 | 54.7 | 61.7 | 65.5 | 65.2 | 54.6 | 46.4 | 28.8 | 17.8 | 38.1 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1983 | 1983 | 1978 | 1963 | 1987 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -13.1 | -5.9 | 5.8 | 26.9 | 39.0 | 49.1 | 55.8 | 54.9 | 43.5 | 31.0 | 13.5 | -8.5 | 30.5 |
| Year Lowest Occurred | 1982 | 1967 | 1965 | 1961 | 1967 | 1969 | 1971 | 1967 | 1974 | 1976 | 1985 | 1983 | 1989 |
| Mean Precipitation (in.) | 0.84 | 0.75 | 1.82 | 2.44 | 3.49 | 4.68 | 3.52 | 3.80 | 3.14 | 2.44 | 1.34 | 0.87 | 29.13 |
| Highest Precipitation (in.) | 2.93 | 2.18 | 4.73 | 6.11 | 8.52 | 14.97 | 9.41 | 6.97 | 8.54 | 6.46 | 4.72 | 2.29 | 46.46 |
| Year Highest Occurred | 1975 | 1971 | 1990 | 1986 | 1977 | 1983 | 1962 | 1964 | 1983 | 1971 | 1977 | 1982 | 1983 |
| Lowest Precipitation (in.) | 0.00 | 0.02 | 0.32 | 0.28 | 0.68 | 0.52 | 0.80 | 1.28 | 0.74 | 0.05 | 0.09 | 0.00 | 15.45 |
| Year Lowest Occurred | 1978 | 1982 | 1974 | 1987 | 1967 | 1988 | 1975 | 1976 | 1976 | 1964 | 1967 | 1975 | 1976 |
| Heating Degree Days (F) | 1711. | 1378. | 1119. | 600. | 256. | 50. | 13. | 27. | 182. | 521. | 1008. | 1541. | 8406. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 45. | 128. | 245. | 173. | 29. | 0. | 0. | 0. | 620. |