| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 32.3 | 39.3 | 47.0 | 55.3 | 63.3 | 71.6 | 80.2 | 79.8 | 70.2 | 57.9 | 40.9 | 31.6 | 55.8 |
| Highest Mean Max. Temperature (F) | 40.0 | 48.7 | 57.2 | 64.2 | 72.0 | 78.8 | 87.5 | 85.2 | 79.4 | 67.6 | 53.5 | 39.5 | 87.5 |
| Year Highest Occurred | 1983 | 1991 | 1992 | 1987 | 1992 | 1986 | 1985 | 1991 | 1990 | 1987 | 1999 | 1980 | 1985 |
| Lowest Mean Max. Temperature (F) | 18.7 | 29.5 | 40.4 | 45.7 | 55.7 | 66.2 | 69.1 | 73.0 | 60.1 | 50.9 | 29.6 | 19.4 | 18.7 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1978 | 1998 | 1993 | 1976 | 1986 | 1984 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 21.0 | 26.7 | 34.0 | 40.9 | 47.9 | 54.9 | 60.3 | 59.5 | 50.9 | 41.3 | 29.8 | 21.1 | 40.7 |
| Highest Mean Temperature (F) | 29.7 | 35.9 | 40.6 | 46.2 | 52.6 | 60.0 | 64.8 | 64.0 | 57.5 | 46.6 | 39.0 | 29.6 | 64.8 |
| Year Highest Occurred | 1983 | 1991 | 1992 | 1990 | 1993 | 1988 | 1985 | 1983 | 1998 | 1988 | 1999 | 1979 | 1985 |
| Lowest Mean Temperature (F) | 4.3 | 16.0 | 27.3 | 34.7 | 43.8 | 51.8 | 54.5 | 55.7 | 45.9 | 37.2 | 18.9 | 8.1 | 4.3 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1975 | 1974 | 1975 | 1993 | 1987 | 1972 | 1984 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 9.7 | 14.0 | 21.0 | 26.5 | 32.5 | 38.1 | 40.3 | 39.2 | 31.6 | 24.7 | 18.7 | 10.6 | 25.6 |
| Highest Mean Min. Temperature (F) | 19.5 | 23.1 | 25.7 | 31.5 | 36.3 | 42.2 | 45.9 | 45.6 | 38.9 | 28.4 | 25.2 | 19.7 | 45.9 |
| Year Highest Occurred | 1983 | 1991 | 1986 | 1990 | 1993 | 1988 | 1975 | 1983 | 1998 | 2000 | 1998 | 1979 | 1975 |
| Lowest Mean Min. Temperature (F) | -10.0 | 1.9 | 11.4 | 21.5 | 28.3 | 34.8 | 35.3 | 33.7 | 26.7 | 15.7 | 8.2 | -3.2 | -10.0 |
| Year Lowest Occurred | 1979 | 1993 | 1985 | 1982 | 1973 | 1974 | 1971 | 1988 | 1974 | 1987 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.96 | 0.80 | 0.99 | 1.50 | 2.25 | 2.20 | 1.39 | 1.41 | 1.22 | 1.17 | 1.18 | 0.97 | 16.04 |
| Highest Precipitation (in.) | 1.98 | 2.59 | 2.01 | 3.34 | 5.09 | 4.11 | 3.41 | 3.46 | 3.28 | 4.31 | 2.82 | 2.87 | 5.09 |
| Year Highest Occurred | 1975 | 1986 | 1989 | 1998 | 1980 | 1993 | 1995 | 1989 | 1986 | 1975 | 1995 | 1996 | 1980 |
| Lowest Precipitation (in.) | 0.09 | 0.00 | 0.37 | 0.34 | 0.45 | 0.45 | 0.07 | 0.10 | 0.02 | 0.00 | 0.27 | 0.13 | 0.00 |
| Year Lowest Occurred | 1981 | 1977 | 1992 | 1977 | 1979 | 1974 | 1988 | 1998 | 1979 | 1987 | 1982 | 1986 | 1977 |
| Heating Degree Days (F) | 1365. | 1074. | 961. | 723. | 530. | 306. | 170. | 189. | 426. | 734. | 1057. | 1361. | 8896. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 2. | 21. | 18. | 2. | 0. | 0. | 0. | 43. |