| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 22.9 | 29.0 | 40.5 | 56.3 | 69.4 | 78.0 | 82.6 | 79.6 | 70.1 | 58.3 | 42.0 | 27.2 | 54.7 |
| Highest Mean Max. Temperature (F) | 33.5 | 38.5 | 49.4 | 64.5 | 81.4 | 85.2 | 88.3 | 85.4 | 75.2 | 70.2 | 50.3 | 35.7 | 58.2 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1977 | 1977 | 1988 | 1988 | 1988 | 1978 | 1963 | 1975 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 12.9 | 22.6 | 31.6 | 49.7 | 61.5 | 67.4 | 74.6 | 75.6 | 65.4 | 51.8 | 34.9 | 16.9 | 51.9 |
| Year Lowest Occurred | 1963 | 1979 | 1965 | 1975 | 1983 | 1969 | 1962 | 1986 | 1965 | 1988 | 1985 | 1989 | 1972 |
| Mean Temperature (F) | 12.9 | 18.0 | 30.0 | 44.4 | 56.5 | 65.4 | 70.4 | 67.6 | 58.5 | 47.3 | 33.1 | 18.4 | 43.5 |
| Highest Mean Temperature (F) | 23.2 | 28.6 | 39.7 | 50.6 | 65.8 | 69.7 | 74.8 | 72.8 | 63.2 | 57.3 | 39.2 | 26.8 | 47.3 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1977 | 1977 | 1971 | 1983 | 1988 | 1978 | 1963 | 1963 | 1965 | 1987 |
| Lowest Mean Temperature (F) | 2.1 | 10.5 | 22.4 | 38.8 | 49.7 | 57.6 | 64.1 | 63.8 | 54.9 | 40.6 | 24.9 | 7.8 | 41.1 |
| Year Lowest Occurred | 1977 | 1979 | 1965 | 1975 | 1967 | 1969 | 1962 | 1967 | 1975 | 1987 | 1976 | 1989 | 1989 |
| Mean Min. Temperature (F) | 2.9 | 6.9 | 19.4 | 32.5 | 43.5 | 52.7 | 58.2 | 55.5 | 46.9 | 36.3 | 24.1 | 9.6 | 32.4 |
| Highest Mean Min. Temperature (F) | 13.0 | 19.3 | 30.4 | 37.4 | 50.1 | 57.8 | 62.6 | 60.8 | 51.1 | 44.5 | 30.2 | 20.4 | 36.3 |
| Year Highest Occurred | 1983 | 1984 | 1973 | 1985 | 1977 | 1971 | 1983 | 1983 | 1978 | 1971 | 1963 | 1987 | 1987 |
| Lowest Mean Min. Temperature (F) | -9.8 | -2.8 | 12.7 | 27.2 | 36.8 | 46.9 | 53.5 | 51.0 | 40.7 | 29.2 | 12.8 | -2.2 | 28.8 |
| Year Lowest Occurred | 1977 | 1978 | 1969 | 1982 | 1967 | 1982 | 1962 | 1967 | 1976 | 1987 | 1976 | 1985 | 1976 |
| Mean Precipitation (in.) | 1.07 | 1.02 | 2.15 | 2.78 | 3.66 | 3.80 | 4.09 | 3.88 | 4.01 | 2.56 | 1.90 | 1.47 | 32.39 |
| Highest Precipitation (in.) | 2.91 | 3.00 | 4.45 | 5.63 | 8.82 | 8.12 | 9.52 | 9.41 | 9.04 | 8.81 | 4.25 | 2.70 | 40.19 |
| Year Highest Occurred | 1967 | 1981 | 1966 | 1973 | 1989 | 1967 | 1971 | 1980 | 1965 | 1984 | 1977 | 1971 | 1965 |
| Lowest Precipitation (in.) | 0.09 | 0.02 | 0.35 | 0.98 | 0.73 | 0.95 | 1.48 | 1.21 | 0.18 | 0.32 | 0.04 | 0.31 | 23.20 |
| Year Lowest Occurred | 1981 | 1964 | 1978 | 1989 | 1988 | 1988 | 1975 | 1976 | 1979 | 1964 | 1976 | 1989 | 1976 |
| Heating Degree Days (F) | 1615. | 1316. | 1085. | 618. | 299. | 75. | 21. | 43. | 201. | 549. | 957. | 1445. | 8224. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 36. | 87. | 188. | 124. | 6. | 0. | 0. | 0. | 441. |