| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 27.7 | 33.2 | 42.5 | 53.2 | 64.2 | 75.3 | 82.0 | 80.6 | 72.0 | 59.4 | 40.6 | 28.7 | 55.0 |
| Highest Mean Max. Temperature (F) | 41.4 | 42.6 | 50.7 | 61.9 | 70.5 | 82.0 | 87.5 | 84.6 | 79.3 | 67.2 | 51.9 | 41.4 | 87.5 |
| Year Highest Occurred | 1981 | 1995 | 1992 | 1987 | 1994 | 1994 | 2000 | 2000 | 1998 | 1988 | 1999 | 1980 | 2000 |
| Lowest Mean Max. Temperature (F) | 18.8 | 26.7 | 37.4 | 44.1 | 58.1 | 69.8 | 77.4 | 77.8 | 65.7 | 49.0 | 30.6 | 22.0 | 18.8 |
| Year Lowest Occurred | 1979 | 1985 | 1980 | 1984 | 1983 | 1983 | 1986 | 1979 | 1986 | 1984 | 2000 | 1978 | 1979 |
| Mean Temperature (F) | 14.3 | 18.6 | 28.9 | 38.6 | 47.9 | 55.7 | 62.0 | 60.8 | 52.3 | 41.5 | 27.0 | 15.4 | 38.6 |
| Highest Mean Temperature (F) | 25.5 | 27.5 | 36.3 | 44.6 | 51.8 | 62.0 | 66.4 | 65.3 | 58.6 | 46.6 | 33.3 | 27.4 | 66.4 |
| Year Highest Occurred | 1981 | 1995 | 1992 | 1989 | 1994 | 1988 | 1998 | 2000 | 1998 | 1988 | 1998 | 1980 | 1998 |
| Lowest Mean Temperature (F) | 6.6 | 10.5 | 22.1 | 32.0 | 43.8 | 51.4 | 58.2 | 56.8 | 47.8 | 36.7 | 17.1 | 9.3 | 6.6 |
| Year Lowest Occurred | 1979 | 1974 | 1976 | 1984 | 1975 | 1975 | 1992 | 1974 | 1971 | 1984 | 2000 | 1978 | 1979 |
| Mean Min. Temperature (F) | 0.9 | 4.0 | 15.2 | 23.9 | 31.5 | 36.0 | 41.9 | 40.9 | 32.5 | 23.5 | 13.3 | 2.1 | 22.1 |
| Highest Mean Min. Temperature (F) | 10.8 | 14.6 | 21.9 | 28.8 | 36.6 | 42.3 | 46.8 | 46.0 | 38.5 | 29.0 | 21.2 | 13.4 | 46.8 |
| Year Highest Occurred | 2000 | 2000 | 1992 | 1989 | 1987 | 1988 | 1998 | 2000 | 1997 | 1972 | 1998 | 1980 | 1998 |
| Lowest Mean Min. Temperature (F) | -9.1 | -6.9 | 6.4 | 18.5 | 28.1 | 31.7 | 37.5 | 34.6 | 26.7 | 17.9 | 3.6 | -5.0 | -9.1 |
| Year Lowest Occurred | 1984 | 1974 | 1976 | 1975 | 1972 | 1982 | 1972 | 1974 | 1974 | 1999 | 2000 | 1990 | 1984 |
| Mean Precipitation (in.) | 2.58 | 2.15 | 2.04 | 2.31 | 2.31 | 1.43 | 1.46 | 1.46 | 1.72 | 1.92 | 2.35 | 2.37 | 24.10 |
| Highest Precipitation (in.) | 5.86 | 4.69 | 3.47 | 4.16 | 5.66 | 3.90 | 3.27 | 3.46 | 6.48 | 4.29 | 5.59 | 6.79 | 6.79 |
| Year Highest Occurred | 1996 | 1986 | 1974 | 1985 | 1995 | 1984 | 1986 | 1997 | 1997 | 1981 | 1985 | 1983 | 1983 |
| Lowest Precipitation (in.) | 0.74 | 1.04 | 0.60 | 0.63 | 0.40 | 0.10 | 0.14 | 0.42 | 0.23 | 0.24 | 0.54 | 0.63 | 0.10 |
| Year Lowest Occurred | 1986 | 1984 | 1999 | 1981 | 1974 | 1980 | 1971 | 1996 | 1975 | 1988 | 1976 | 1979 | 1980 |
| Heating Degree Days (F) | 1571. | 1299. | 1121. | 793. | 533. | 286. | 125. | 156. | 384. | 731. | 1142. | 1537. | 9678. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 7. | 30. | 22. | 1. | 0. | 0. | 0. | 60. |