| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 48.5 | 50.7 | 53.7 | 60.4 | 68.8 | 78.6 | 86.5 | 86.2 | 78.9 | 68.2 | 54.9 | 48.8 | 65.4 |
| Highest Mean Max. Temperature (F) | 54.9 | 59.1 | 64.1 | 69.7 | 76.6 | 84.8 | 91.4 | 90.2 | 86.4 | 76.7 | 64.7 | 56.8 | 91.4 |
| Year Highest Occurred | 1984 | 1991 | 1972 | 1987 | 1997 | 1981 | 1988 | 1981 | 1974 | 1988 | 1995 | 1976 | 1988 |
| Lowest Mean Max. Temperature (F) | 40.8 | 42.8 | 43.8 | 50.6 | 55.7 | 71.7 | 80.8 | 76.8 | 68.7 | 60.1 | 44.1 | 41.0 | 40.8 |
| Year Lowest Occurred | 1995 | 1998 | 1991 | 1975 | 1998 | 1998 | 1992 | 1976 | 1985 | 1984 | 1994 | 1971 | 1995 |
| Mean Temperature (F) | 39.2 | 40.3 | 42.6 | 48.0 | 55.8 | 64.3 | 71.2 | 70.9 | 64.7 | 55.5 | 44.6 | 39.6 | 53.1 |
| Highest Mean Temperature (F) | 45.2 | 47.2 | 49.9 | 55.0 | 63.0 | 69.9 | 75.4 | 74.0 | 70.4 | 62.1 | 52.6 | 45.7 | 75.4 |
| Year Highest Occurred | 1986 | 1991 | 1997 | 1987 | 1992 | 1981 | 1988 | 1998 | 1974 | 1999 | 1995 | 1980 | 1988 |
| Lowest Mean Temperature (F) | 33.7 | 35.6 | 34.8 | 39.6 | 46.3 | 59.3 | 66.2 | 63.7 | 56.7 | 48.4 | 35.9 | 30.2 | 30.2 |
| Year Lowest Occurred | 1993 | 1998 | 1991 | 1975 | 1998 | 1998 | 1983 | 1976 | 1986 | 1971 | 1994 | 1971 | 1971 |
| Mean Min. Temperature (F) | 29.8 | 29.8 | 31.5 | 35.6 | 42.7 | 49.9 | 55.9 | 55.6 | 50.5 | 42.7 | 34.3 | 30.3 | 40.7 |
| Highest Mean Min. Temperature (F) | 36.4 | 35.3 | 37.1 | 41.9 | 49.4 | 55.0 | 59.7 | 58.7 | 55.0 | 48.2 | 40.5 | 35.7 | 59.7 |
| Year Highest Occurred | 1986 | 1991 | 1986 | 1989 | 1992 | 1981 | 1996 | 1992 | 1991 | 1991 | 1995 | 1980 | 1996 |
| Lowest Mean Min. Temperature (F) | 23.6 | 24.8 | 24.3 | 28.4 | 36.5 | 44.2 | 51.0 | 50.7 | 44.4 | 33.5 | 27.6 | 19.5 | 19.5 |
| Year Lowest Occurred | 1972 | 1990 | 1976 | 1976 | 1977 | 1971 | 1983 | 1976 | 1986 | 1971 | 1994 | 1971 | 1971 |
| Mean Precipitation (in.) | 9.44 | 8.40 | 7.38 | 3.41 | 1.75 | 0.79 | 0.18 | 0.21 | 1.08 | 2.72 | 5.89 | 6.21 | 47.46 |
| Highest Precipitation (in.) | 31.33 | 30.96 | 22.52 | 9.12 | 6.48 | 3.72 | 2.30 | 2.42 | 5.48 | 8.07 | 19.00 | 18.58 | 31.33 |
| Year Highest Occurred | 1997 | 1986 | 1991 | 1978 | 1995 | 1993 | 1992 | 1976 | 1982 | 1975 | 1983 | 1996 | 1997 |
| Lowest Precipitation (in.) | 0.30 | 0.62 | 0.17 | 0.59 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 0.00 | 0.00 |
| Year Lowest Occurred | 1984 | 1997 | 1972 | 1992 | 1985 | 1994 | 2000 | 1998 | 1995 | 1995 | 1995 | 1989 | 1985 |
| Heating Degree Days (F) | 802. | 694. | 679. | 515. | 319. | 104. | 13. | 16. | 112. | 324. | 612. | 790. | 4980. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 6. | 32. | 81. | 205. | 199. | 104. | 28. | 1. | 0. | 656. |