| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 47.3 | 51.6 | 56.5 | 62.1 | 68.3 | 73.6 | 79.2 | 80.0 | 74.8 | 63.5 | 52.5 | 46.8 | 63.0 |
| Highest Mean Max. Temperature (F) | 51.8 | 57.5 | 62.9 | 67.0 | 74.9 | 80.0 | 86.9 | 85.8 | 81.7 | 70.4 | 57.0 | 51.7 | 86.9 |
| Year Highest Occurred | 1986 | 1991 | 1992 | 1989 | 1992 | 1987 | 1985 | 1986 | 1974 | 1987 | 1995 | 1980 | 1985 |
| Lowest Mean Max. Temperature (F) | 41.6 | 44.7 | 50.9 | 56.7 | 62.8 | 68.7 | 72.3 | 74.5 | 69.5 | 59.5 | 44.5 | 40.5 | 40.5 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1972 | 1996 | 1980 | 1993 | 1976 | 1996 | 1984 | 1985 | 1990 | 1990 |
| Mean Temperature (F) | 41.2 | 44.1 | 47.5 | 51.6 | 57.3 | 62.1 | 66.6 | 67.0 | 62.3 | 53.5 | 45.8 | 41.2 | 53.4 |
| Highest Mean Temperature (F) | 45.3 | 48.8 | 51.5 | 54.7 | 61.5 | 65.7 | 70.3 | 70.5 | 65.9 | 57.0 | 50.4 | 45.6 | 70.5 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1989 | 1993 | 1992 | 1998 | 1977 | 1974 | 1988 | 1995 | 1979 | 1977 |
| Lowest Mean Temperature (F) | 34.3 | 36.0 | 43.2 | 46.9 | 53.7 | 58.5 | 63.2 | 63.1 | 58.6 | 50.9 | 37.2 | 34.8 | 34.3 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1975 | 1996 | 1971 | 1993 | 1973 | 1983 | 1984 | 1985 | 1990 | 1979 |
| Mean Min. Temperature (F) | 35.1 | 36.5 | 38.4 | 41.0 | 46.2 | 50.5 | 54.0 | 54.0 | 49.7 | 43.5 | 39.1 | 35.6 | 43.6 |
| Highest Mean Min. Temperature (F) | 39.9 | 40.2 | 41.1 | 44.7 | 50.5 | 53.8 | 59.1 | 57.9 | 53.5 | 49.3 | 44.5 | 40.0 | 59.1 |
| Year Highest Occurred | 1994 | 1978 | 1986 | 1990 | 1993 | 1998 | 1998 | 1999 | 1997 | 1988 | 1998 | 1979 | 1998 |
| Lowest Mean Min. Temperature (F) | 26.9 | 27.2 | 33.9 | 36.1 | 43.6 | 47.9 | 51.9 | 49.8 | 46.4 | 39.8 | 30.0 | 29.0 | 26.9 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1975 | 1984 | 1971 | 1977 | 1973 | 1971 | 1972 | 1985 | 1990 | 1979 |
| Mean Precipitation (in.) | 6.50 | 5.53 | 4.92 | 3.46 | 2.52 | 1.93 | 0.81 | 1.14 | 2.00 | 4.03 | 7.29 | 7.36 | 47.49 |
| Highest Precipitation (in.) | 14.63 | 12.56 | 8.94 | 7.69 | 5.10 | 4.52 | 2.38 | 4.15 | 6.73 | 8.39 | 12.84 | 14.32 | 14.63 |
| Year Highest Occurred | 1990 | 1999 | 1997 | 1996 | 1984 | 1984 | 1974 | 1977 | 1978 | 1997 | 1995 | 1996 | 1990 |
| Lowest Precipitation (in.) | 0.34 | 0.17 | 1.57 | 0.92 | 0.34 | 0.24 | 0.00 | 0.02 | 0.00 | 0.44 | 1.24 | 2.08 | 0.00 |
| Year Lowest Occurred | 1985 | 1993 | 1992 | 1977 | 1992 | 1987 | 1984 | 1998 | 1990 | 1978 | 1976 | 1985 | 1984 |
| Heating Degree Days (F) | 738. | 587. | 544. | 403. | 246. | 115. | 38. | 38. | 119. | 357. | 576. | 739. | 4500. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 6. | 26. | 87. | 100. | 36. | 0. | 0. | 0. | 255. |