| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 35.9 | 41.1 | 48.8 | 56.0 | 64.5 | 71.3 | 79.0 | 79.8 | 72.2 | 60.5 | 44.3 | 35.8 | 57.4 |
| Highest Mean Max. Temperature (F) | 45.1 | 48.2 | 56.3 | 62.5 | 70.8 | 78.0 | 84.8 | 85.3 | 78.7 | 69.4 | 49.5 | 41.2 | 85.3 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1977 | 1992 | 1992 | 1985 | 1986 | 1990 | 1988 | 1999 | 1980 | 1986 |
| Lowest Mean Max. Temperature (F) | 21.9 | 32.5 | 42.7 | 50.8 | 59.4 | 65.5 | 68.8 | 74.5 | 65.5 | 54.7 | 33.3 | 23.9 | 21.9 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1991 | 1991 | 1993 | 1976 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Temperature (F) | 28.9 | 32.7 | 38.2 | 43.0 | 49.6 | 55.7 | 60.9 | 60.9 | 53.6 | 44.6 | 35.8 | 29.0 | 44.4 |
| Highest Mean Temperature (F) | 36.3 | 39.2 | 42.4 | 46.3 | 55.0 | 60.8 | 66.8 | 65.3 | 58.4 | 50.5 | 40.8 | 35.1 | 66.8 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1987 | 1993 | 1992 | 1998 | 1977 | 1998 | 1988 | 1999 | 1999 | 1998 |
| Lowest Mean Temperature (F) | 13.9 | 22.6 | 33.6 | 38.0 | 46.2 | 51.6 | 54.7 | 57.2 | 49.5 | 41.8 | 23.9 | 18.0 | 13.9 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1977 | 1991 | 1993 | 1980 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Min. Temperature (F) | 21.8 | 24.2 | 27.6 | 29.9 | 34.7 | 40.1 | 42.7 | 42.0 | 34.9 | 28.6 | 27.3 | 22.2 | 31.3 |
| Highest Mean Min. Temperature (F) | 28.4 | 31.2 | 33.9 | 33.8 | 42.0 | 44.1 | 49.1 | 46.5 | 39.0 | 32.9 | 33.3 | 29.2 | 49.1 |
| Year Highest Occurred | 1990 | 1992 | 1983 | 1992 | 1993 | 1986 | 1998 | 1999 | 1997 | 1979 | 1998 | 1999 | 1998 |
| Lowest Mean Min. Temperature (F) | 5.9 | 12.7 | 23.8 | 25.2 | 30.9 | 36.2 | 38.5 | 37.6 | 30.1 | 23.4 | 13.7 | 12.0 | 5.9 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1982 | 1976 | 1986 | 1980 | 1999 | 1987 | 1993 | 1985 | 1979 |
| Mean Precipitation (in.) | 5.76 | 4.38 | 3.06 | 1.58 | 1.06 | 0.70 | 0.24 | 0.33 | 1.06 | 1.92 | 4.88 | 5.75 | 30.72 |
| Highest Precipitation (in.) | 9.73 | 12.85 | 8.57 | 5.85 | 2.80 | 2.26 | 1.49 | 2.19 | 2.89 | 6.46 | 11.01 | 17.24 | 17.24 |
| Year Highest Occurred | 1998 | 1999 | 1983 | 1996 | 1998 | 1981 | 1987 | 1979 | 1982 | 1997 | 1983 | 1996 | 1996 |
| Lowest Precipitation (in.) | 0.10 | 0.76 | 0.46 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.00 | 1.35 | 0.00 |
| Year Lowest Occurred | 1985 | 1993 | 1981 | 1999 | 1999 | 1999 | 2000 | 2000 | 1999 | 1988 | 1993 | 1976 | 1999 |
| Heating Degree Days (F) | 1122. | 905. | 831. | 662. | 476. | 283. | 154. | 156. | 348. | 634. | 876. | 1116. | 7563. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 4. | 25. | 28. | 4. | 0. | 0. | 0. | 61. |