| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 18.8 | 25.4 | 38.0 | 56.1 | 70.0 | 78.8 | 83.9 | 81.0 | 70.6 | 59.1 | 39.1 | 23.1 | 53.7 |
| Highest Mean Max. Temperature (F) | 34.5 | 39.8 | 49.7 | 69.4 | 80.5 | 88.6 | 91.9 | 85.7 | 76.7 | 71.8 | 46.5 | 32.5 | 59.3 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1969 | 1981 | 1979 | 1987 |
| Lowest Mean Max. Temperature (F) | 7.6 | 16.1 | 25.9 | 43.7 | 63.3 | 71.8 | 78.0 | 75.1 | 58.8 | 53.9 | 28.6 | 8.4 | 50.0 |
| Year Lowest Occurred | 1977 | 1979 | 1965 | 1975 | 1967 | 1969 | 1962 | 1985 | 1965 | 1972 | 1985 | 1983 | 1972 |
| Mean Temperature (F) | 8.5 | 14.9 | 28.3 | 44.5 | 57.4 | 66.6 | 71.6 | 68.9 | 58.9 | 47.8 | 30.3 | 14.4 | 42.7 |
| Highest Mean Temperature (F) | 24.0 | 29.4 | 37.2 | 53.3 | 65.8 | 74.0 | 76.9 | 74.8 | 64.9 | 60.2 | 36.9 | 23.9 | 47.9 |
| Year Highest Occurred | 1990 | 1987 | 1968 | 1987 | 1977 | 1988 | 1988 | 1983 | 1978 | 1969 | 1981 | 1979 | 1987 |
| Lowest Mean Temperature (F) | -2.7 | 4.8 | 15.7 | 35.7 | 50.4 | 60.2 | 65.5 | 63.6 | 50.7 | 42.3 | 18.8 | 0.3 | 39.8 |
| Year Lowest Occurred | 1977 | 1967 | 1965 | 1975 | 1967 | 1969 | 1971 | 1985 | 1965 | 1976 | 1985 | 1983 | 1972 |
| Mean Min. Temperature (F) | -1.8 | 4.3 | 18.5 | 32.8 | 44.7 | 54.4 | 59.3 | 56.7 | 47.0 | 36.4 | 21.5 | 5.6 | 31.6 |
| Highest Mean Min. Temperature (F) | 13.4 | 19.4 | 28.5 | 39.3 | 53.5 | 59.3 | 64.2 | 63.8 | 53.0 | 48.6 | 27.3 | 16.4 | 36.4 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1977 | 1977 | 1988 | 1983 | 1983 | 1978 | 1969 | 1983 | 1965 | 1987 |
| Lowest Mean Min. Temperature (F) | -13.1 | -8.4 | 5.5 | 27.2 | 37.5 | 48.6 | 52.6 | 52.1 | 41.2 | 29.6 | 8.9 | -7.9 | 28.5 |
| Year Lowest Occurred | 1982 | 1967 | 1965 | 1961 | 1967 | 1969 | 1971 | 1985 | 1974 | 1976 | 1985 | 1983 | 1985 |
| Mean Precipitation (in.) | 0.74 | 0.65 | 1.49 | 2.37 | 3.27 | 4.20 | 3.24 | 3.13 | 3.06 | 2.26 | 1.25 | 0.76 | 26.42 |
| Highest Precipitation (in.) | 3.36 | 2.06 | 3.69 | 6.06 | 7.97 | 8.51 | 9.49 | 7.09 | 6.33 | 8.36 | 3.61 | 2.90 | 38.15 |
| Year Highest Occurred | 1975 | 1971 | 1965 | 1986 | 1962 | 1984 | 1972 | 1964 | 1965 | 1971 | 1970 | 1968 | 1986 |
| Lowest Precipitation (in.) | 0.02 | 0.03 | 0.26 | 0.04 | 0.47 | 0.62 | 0.53 | 0.37 | 0.59 | 0.07 | 0.03 | 0.02 | 13.82 |
| Year Lowest Occurred | 1990 | 1964 | 1974 | 1987 | 1976 | 1987 | 1970 | 1976 | 1966 | 1978 | 1967 | 1988 | 1976 |
| Heating Degree Days (F) | 1752. | 1403. | 1138. | 615. | 272. | 60. | 17. | 31. | 204. | 533. | 1041. | 1569. | 8635. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 36. | 108. | 221. | 152. | 21. | 0. | 0. | 0. | 538. |