| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 46.2 | 49.6 | 53.1 | 57.5 | 63.0 | 66.1 | 71.1 | 71.7 | 69.2 | 60.2 | 50.4 | 45.6 | 58.6 |
| Highest Mean Max. Temperature (F) | 51.5 | 55.4 | 60.4 | 61.9 | 68.9 | 70.7 | 76.4 | 74.8 | 75.1 | 67.8 | 55.9 | 49.1 | 76.4 |
| Year Highest Occurred | 1981 | 1991 | 1992 | 1989 | 1992 | 1978 | 1985 | 1986 | 1974 | 1987 | 1997 | 1999 | 1985 |
| Lowest Mean Max. Temperature (F) | 40.7 | 43.5 | 47.8 | 52.1 | 58.7 | 61.3 | 65.8 | 66.3 | 63.9 | 55.9 | 42.0 | 40.1 | 40.1 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1972 | 1974 | 1971 | 1993 | 1975 | 1978 | 1975 | 1985 | 1990 | 1990 |
| Mean Temperature (F) | 40.0 | 41.9 | 43.9 | 47.1 | 52.3 | 56.2 | 60.0 | 60.3 | 56.9 | 49.8 | 43.3 | 39.5 | 49.3 |
| Highest Mean Temperature (F) | 43.9 | 46.6 | 47.9 | 49.8 | 55.8 | 59.7 | 62.2 | 62.9 | 61.1 | 52.8 | 47.2 | 43.8 | 62.9 |
| Year Highest Occurred | 1986 | 1991 | 1992 | 1989 | 1993 | 1978 | 1985 | 1977 | 1995 | 1979 | 1987 | 1979 | 1977 |
| Lowest Mean Temperature (F) | 34.1 | 34.6 | 39.9 | 43.3 | 49.1 | 53.1 | 57.3 | 57.3 | 53.4 | 47.5 | 35.0 | 34.0 | 34.0 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1999 | 1971 | 1986 | 1973 | 1983 | 1971 | 1985 | 1990 | 1990 |
| Mean Min. Temperature (F) | 33.7 | 34.2 | 34.7 | 36.7 | 41.5 | 46.3 | 48.8 | 48.8 | 44.6 | 39.3 | 36.2 | 33.4 | 39.9 |
| Highest Mean Min. Temperature (F) | 37.9 | 38.0 | 38.0 | 41.0 | 46.2 | 48.6 | 53.2 | 51.6 | 50.8 | 44.0 | 40.6 | 38.5 | 53.2 |
| Year Highest Occurred | 1978 | 1978 | 1983 | 1996 | 1993 | 1978 | 1998 | 1977 | 1995 | 1988 | 1987 | 1979 | 1998 |
| Lowest Mean Min. Temperature (F) | 27.6 | 25.7 | 30.7 | 30.3 | 38.4 | 43.9 | 46.7 | 45.9 | 40.8 | 36.1 | 28.0 | 28.0 | 25.7 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1999 | 1999 | 1985 | 1984 | 1985 | 1983 | 1994 | 1985 | 1990 | 1989 |
| Mean Precipitation (in.) | 16.37 | 13.62 | 11.83 | 8.29 | 5.01 | 3.98 | 1.94 | 2.63 | 4.38 | 9.32 | 17.05 | 17.94 | 112.36 |
| Highest Precipitation (in.) | 26.74 | 29.51 | 24.85 | 17.31 | 12.30 | 8.96 | 5.50 | 12.76 | 11.60 | 20.65 | 30.35 | 30.14 | 30.35 |
| Year Highest Occurred | 1992 | 1999 | 1997 | 1996 | 1988 | 1981 | 1983 | 1991 | 1997 | 1975 | 1998 | 1998 | 1998 |
| Lowest Precipitation (in.) | 1.33 | 0.87 | 2.03 | 2.23 | 1.25 | 1.21 | 0.17 | 0.07 | 0.09 | 1.36 | 4.42 | 4.22 | 0.07 |
| Year Lowest Occurred | 1985 | 1993 | 1992 | 1998 | 1992 | 1987 | 1985 | 1998 | 1993 | 1987 | 1976 | 1985 | 1998 |
| Heating Degree Days (F) | 776. | 646. | 639. | 538. | 396. | 265. | 160. | 154. | 250. | 473. | 651. | 790. | 5738. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 4. | 6. | 6. | 0. | 0. | 0. | 16. |