| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Mean Max. Temperature (F) | 24.6 | 27.1 | 35.8 | 48.0 | 59.9 | 69.2 | 75.8 | 74.0 | 65.7 | 55.2 | 40.6 | 28.7 | 50.4 |
| Highest Mean Max. Temperature (F) | 33.8 | 36.3 | 42.1 | 54.7 | 69.5 | 75.7 | 81.6 | 80.6 | 70.7 | 68.3 | 46.4 | 34.8 | 54.4 |
| Year Highest Occurred | 1990 | 1987 | 1987 | 1987 | 1977 | 1988 | 1983 | 1969 | 1989 | 1963 | 1975 | 1974 | 1987 |
| Lowest Mean Max. Temperature (F) | 16.0 | 20.0 | 29.1 | 41.5 | 51.7 | 63.5 | 71.7 | 69.5 | 60.3 | 49.9 | 34.8 | 21.3 | 47.1 |
| Year Lowest Occurred | 1963 | 1963 | 1965 | 1975 | 1973 | 1969 | 1962 | 1977 | 1965 | 1988 | 1976 | 1989 | 1972 |
| Mean Temperature (F) | 17.8 | 19.6 | 28.5 | 39.9 | 50.5 | 59.5 | 66.6 | 65.5 | 57.6 | 47.6 | 34.9 | 22.9 | 42.6 |
| Highest Mean Temperature (F) | 26.3 | 28.4 | 35.5 | 44.9 | 58.6 | 64.3 | 70.8 | 71.1 | 61.4 | 59.1 | 39.8 | 29.8 | 45.8 |
| Year Highest Occurred | 1990 | 1984 | 1973 | 1987 | 1977 | 1976 | 1983 | 1969 | 1971 | 1963 | 1975 | 1974 | 1987 |
| Lowest Mean Temperature (F) | 9.6 | 12.0 | 22.4 | 35.2 | 45.1 | 54.4 | 63.1 | 61.3 | 53.2 | 42.4 | 29.4 | 14.4 | 39.7 |
| Year Lowest Occurred | 1963 | 1979 | 1984 | 1972 | 1983 | 1982 | 1962 | 1982 | 1974 | 1988 | 1976 | 1983 | 1972 |
| Mean Min. Temperature (F) | 11.1 | 12.2 | 21.1 | 31.8 | 41.1 | 49.7 | 57.3 | 56.8 | 49.5 | 40.1 | 29.1 | 17.0 | 34.7 |
| Highest Mean Min. Temperature (F) | 19.6 | 21.1 | 29.9 | 36.1 | 47.7 | 53.7 | 61.8 | 61.5 | 54.0 | 49.8 | 34.3 | 24.8 | 37.9 |
| Year Highest Occurred | 1964 | 1984 | 1973 | 1976 | 1977 | 1976 | 1975 | 1973 | 1971 | 1963 | 1963 | 1974 | 1973 |
| Lowest Mean Min. Temperature (F) | 2.2 | 3.9 | 13.7 | 27.1 | 37.0 | 45.0 | 53.7 | 52.2 | 45.4 | 34.8 | 22.8 | 7.2 | 31.5 |
| Year Lowest Occurred | 1982 | 1979 | 1989 | 1982 | 1983 | 1982 | 1985 | 1982 | 1974 | 1988 | 1989 | 1983 | 1989 |
| Mean Precipitation (in.) | 1.84 | 1.50 | 2.20 | 2.38 | 2.67 | 2.93 | 2.36 | 3.05 | 3.90 | 3.13 | 2.56 | 2.15 | 30.67 |
| Highest Precipitation (in.) | 3.57 | 3.08 | 4.87 | 4.27 | 7.16 | 7.07 | 5.36 | 11.76 | 8.25 | 5.85 | 7.30 | 3.96 | 39.43 |
| Year Highest Occurred | 1971 | 1968 | 1979 | 1985 | 1973 | 1968 | 1970 | 1988 | 1980 | 1983 | 1988 | 1968 | 1985 |
| Lowest Precipitation (in.) | 0.83 | 0.42 | 0.39 | 0.90 | 0.05 | 0.77 | 0.55 | 0.50 | 1.20 | 0.90 | 0.77 | 0.63 | 24.16 |
| Year Lowest Occurred | 1984 | 1982 | 1980 | 1989 | 1986 | 1988 | 1981 | 1976 | 1967 | 1963 | 1986 | 1986 | 1963 |
| Heating Degree Days (F) | 1463. | 1271. | 1132. | 753. | 455. | 183. | 50. | 73. | 229. | 539. | 903. | 1305. | 8356. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 6. | 18. | 99. | 89. | 7. | 0. | 0. | 0. | 219. |