| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.1 | 24.6 | 35.0 | 48.7 | 63.9 | 72.7 | 77.1 | 74.7 | 65.5 | 52.8 | 36.1 | 24.0 | 49.5 |
| Highest Mean Max. Temperature (F) | 31.1 | 36.4 | 43.2 | 59.7 | 72.8 | 79.8 | 83.0 | 80.0 | 72.1 | 61.1 | 45.1 | 33.7 | 83.0 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1988 | 1995 | 1975 | 1983 | 1978 | 1973 | 1999 | 1994 | 1975 |
| Lowest Mean Max. Temperature (F) | 9.7 | 16.5 | 25.4 | 42.1 | 54.0 | 64.1 | 71.1 | 69.6 | 58.6 | 44.6 | 28.3 | 14.7 | 9.7 |
| Year Lowest Occurred | 1982 | 1972 | 1984 | 1982 | 1997 | 1998 | 1992 | 1982 | 1974 | 1980 | 1995 | 1985 | 1982 |
| Mean Temperature (F) | 9.2 | 13.7 | 24.7 | 37.8 | 51.6 | 60.5 | 65.3 | 63.2 | 54.6 | 43.5 | 28.8 | 15.6 | 39.0 |
| Highest Mean Temperature (F) | 21.5 | 28.2 | 33.4 | 44.6 | 60.1 | 67.1 | 70.7 | 69.4 | 58.5 | 52.3 | 35.9 | 24.9 | 70.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1995 | 1978 | 1973 | 1977 | 1994 | 1983 |
| Lowest Mean Temperature (F) | -2.3 | 4.7 | 17.0 | 30.3 | 43.6 | 51.0 | 59.4 | 58.1 | 48.2 | 36.7 | 20.9 | 5.3 | -2.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1982 | 1997 | 1982 | 1998 | 1982 | 1974 | 1980 | 1995 | 1985 | 1977 |
| Mean Min. Temperature (F) | -0.8 | 2.7 | 14.3 | 26.9 | 39.2 | 48.2 | 53.5 | 51.7 | 43.7 | 34.2 | 21.4 | 7.2 | 28.5 |
| Highest Mean Min. Temperature (F) | 11.9 | 19.9 | 25.6 | 32.5 | 47.6 | 54.4 | 58.6 | 59.2 | 48.1 | 43.5 | 28.0 | 17.3 | 59.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1990 | 1977 | 1995 | 1983 | 1995 | 1983 | 1973 | 1977 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -14.8 | -8.0 | 6.9 | 18.4 | 33.2 | 37.4 | 47.3 | 46.5 | 37.8 | 28.8 | 13.5 | -4.6 | -14.8 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1982 | 1997 | 1982 | 1998 | 1982 | 1974 | 1980 | 1995 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.41 | 1.06 | 2.04 | 2.07 | 3.19 | 3.53 | 3.19 | 3.59 | 3.69 | 2.87 | 2.22 | 1.48 | 30.34 |
| Highest Precipitation (in.) | 2.74 | 2.78 | 6.13 | 5.41 | 5.96 | 6.61 | 7.80 | 8.67 | 6.67 | 6.38 | 4.71 | 2.77 | 8.67 |
| Year Highest Occurred | 1996 | 1971 | 1977 | 1982 | 1978 | 1981 | 1982 | 1978 | 1985 | 1979 | 1975 | 1996 | 1978 |
| Lowest Precipitation (in.) | 0.49 | 0.20 | 0.32 | 0.58 | 0.07 | 1.18 | 0.47 | 1.30 | 0.87 | 1.16 | 0.54 | 0.27 | 0.07 |
| Year Lowest Occurred | 1984 | 1987 | 1980 | 1997 | 1986 | 1997 | 1976 | 1991 | 1989 | 1976 | 1981 | 1994 | 1986 |
| Heating Degree Days (F) | 1732. | 1438. | 1251. | 816. | 433. | 188. | 87. | 120. | 317. | 667. | 1088. | 1531. | 9668. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 15. | 52. | 97. | 64. | 4. | 0. | 0. | 0. | 232. |