| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 46.6 | 51.1 | 55.1 | 59.5 | 65.4 | 71.4 | 78.8 | 80.1 | 75.1 | 64.4 | 52.0 | 46.0 | 62.1 |
| Highest Mean Max. Temperature (F) | 51.0 | 57.9 | 61.4 | 66.0 | 73.7 | 76.5 | 85.0 | 85.4 | 82.8 | 71.4 | 56.8 | 50.8 | 85.4 |
| Year Highest Occurred | 1983 | 1991 | 1992 | 1987 | 1992 | 1992 | 1985 | 1977 | 1974 | 1987 | 1999 | 1979 | 1977 |
| Lowest Mean Max. Temperature (F) | 39.4 | 40.9 | 49.7 | 53.1 | 59.9 | 66.7 | 71.5 | 74.6 | 68.1 | 59.6 | 43.9 | 39.9 | 39.4 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1998 | 1980 | 1993 | 1976 | 1985 | 1984 | 1985 | 1990 | 1979 |
| Mean Temperature (F) | 39.5 | 42.6 | 45.4 | 48.9 | 54.1 | 59.4 | 64.9 | 65.4 | 61.0 | 52.8 | 44.3 | 39.2 | 51.5 |
| Highest Mean Temperature (F) | 44.0 | 48.1 | 49.8 | 53.1 | 58.9 | 63.3 | 68.4 | 70.2 | 65.0 | 56.9 | 49.6 | 43.7 | 70.2 |
| Year Highest Occurred | 1998 | 1991 | 1992 | 1992 | 1992 | 1992 | 1996 | 1977 | 1974 | 1979 | 1995 | 1973 | 1977 |
| Lowest Mean Temperature (F) | 32.2 | 31.6 | 41.3 | 43.9 | 50.9 | 56.5 | 59.3 | 61.8 | 56.4 | 48.6 | 37.1 | 32.4 | 31.6 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1999 | 1976 | 1989 | 1989 | 1985 | 1971 | 1985 | 1990 | 1989 |
| Mean Min. Temperature (F) | 32.3 | 34.0 | 35.7 | 38.3 | 42.8 | 47.4 | 50.9 | 50.7 | 46.9 | 41.2 | 36.5 | 32.4 | 40.8 |
| Highest Mean Min. Temperature (F) | 37.9 | 38.3 | 39.7 | 42.3 | 45.8 | 50.2 | 53.5 | 55.0 | 51.6 | 46.5 | 42.9 | 37.8 | 55.0 |
| Year Highest Occurred | 1998 | 1991 | 1993 | 1992 | 1997 | 1978 | 1998 | 1977 | 1979 | 1979 | 1995 | 1977 | 1977 |
| Lowest Mean Min. Temperature (F) | 25.0 | 22.3 | 32.2 | 34.4 | 40.1 | 44.9 | 47.1 | 46.2 | 42.9 | 36.6 | 28.8 | 24.8 | 22.3 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1982 | 1999 | 1976 | 1989 | 1988 | 1989 | 1974 | 1993 | 1990 | 1989 |
| Mean Precipitation (in.) | 6.89 | 5.84 | 5.48 | 4.32 | 3.15 | 1.67 | 0.68 | 0.97 | 1.68 | 3.66 | 7.77 | 7.46 | 49.57 |
| Highest Precipitation (in.) | 13.06 | 11.59 | 9.44 | 8.33 | 7.56 | 4.54 | 3.80 | 3.04 | 5.03 | 8.17 | 18.69 | 17.21 | 18.69 |
| Year Highest Occurred | 1996 | 1986 | 1989 | 1993 | 1998 | 1993 | 1987 | 1976 | 1986 | 1996 | 1973 | 1996 | 1973 |
| Lowest Precipitation (in.) | 0.73 | 1.22 | 1.79 | 1.73 | 0.69 | 0.35 | 0.01 | 0.00 | 0.02 | 0.08 | 1.87 | 1.39 | 0.00 |
| Year Lowest Occurred | 1985 | 1988 | 1978 | 1977 | 1992 | 1987 | 1973 | 2000 | 1993 | 1987 | 1976 | 1976 | 2000 |
| Heating Degree Days (F) | 792. | 629. | 608. | 483. | 338. | 178. | 77. | 61. | 148. | 377. | 622. | 799. | 5112. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 1. | 10. | 73. | 74. | 29. | 0. | 0. | 0. | 187. |