| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.6 | 27.6 | 39.1 | 55.7 | 70.1 | 79.2 | 84.2 | 82.0 | 72.9 | 59.7 | 39.5 | 26.3 | 54.8 |
| Highest Mean Max. Temperature (F) | 36.5 | 42.6 | 51.1 | 66.2 | 78.6 | 89.6 | 90.7 | 89.1 | 80.3 | 66.5 | 54.3 | 37.2 | 90.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1975 | 1983 | 1998 | 1973 | 1999 | 1999 | 1975 |
| Lowest Mean Max. Temperature (F) | 7.8 | 13.3 | 29.8 | 42.0 | 62.5 | 72.3 | 74.0 | 75.6 | 64.4 | 55.2 | 26.6 | 9.1 | 7.8 |
| Year Lowest Occurred | 1982 | 1979 | 1984 | 1975 | 1996 | 1993 | 1992 | 1985 | 1985 | 1995 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 10.7 | 17.5 | 29.6 | 44.3 | 57.7 | 67.1 | 71.7 | 69.6 | 59.9 | 46.9 | 29.6 | 16.1 | 43.4 |
| Highest Mean Temperature (F) | 26.2 | 32.0 | 37.7 | 51.8 | 65.3 | 74.6 | 76.6 | 76.3 | 66.1 | 52.3 | 40.0 | 27.2 | 76.6 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1974 | 1983 | 1998 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -3.8 | 1.9 | 21.4 | 35.6 | 51.1 | 62.4 | 64.2 | 64.3 | 54.5 | 42.2 | 18.1 | -0.3 | -3.8 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1996 | 1983 | 1982 |
| Mean Min. Temperature (F) | -0.3 | 7.3 | 20.1 | 32.9 | 45.3 | 55.0 | 59.2 | 57.1 | 46.8 | 34.1 | 19.6 | 5.8 | 31.9 |
| Highest Mean Min. Temperature (F) | 15.9 | 22.7 | 27.5 | 38.7 | 52.1 | 61.3 | 63.7 | 63.5 | 51.8 | 39.6 | 26.2 | 19.8 | 63.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1983 | 1983 | 1998 | 1994 | 1987 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -15.5 | -9.6 | 12.2 | 28.7 | 38.8 | 50.5 | 54.4 | 51.6 | 41.2 | 29.1 | 9.5 | -9.7 | -15.5 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1996 | 1979 | 1982 | 1992 | 1992 | 1974 | 1976 | 1996 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.53 | 0.43 | 1.36 | 2.16 | 2.47 | 3.46 | 3.44 | 2.64 | 1.91 | 2.15 | 1.10 | 0.40 | 22.05 |
| Highest Precipitation (in.) | 1.69 | 1.11 | 6.04 | 6.24 | 5.86 | 7.89 | 7.58 | 6.07 | 4.23 | 6.23 | 3.86 | 1.05 | 7.89 |
| Year Highest Occurred | 1975 | 1977 | 1977 | 1986 | 1972 | 1984 | 1994 | 1995 | 1986 | 1998 | 2000 | 1984 | 1984 |
| Lowest Precipitation (in.) | 0.00 | 0.05 | 0.03 | 0.08 | 0.16 | 0.34 | 0.25 | 0.71 | 0.08 | 0.13 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1990 | 1982 | 1982 | 1996 | 1976 | 1987 | 1975 | 2000 | 1972 | 1999 | 1976 | 1989 | 1990 |
| Heating Degree Days (F) | 1687. | 1332. | 1097. | 624. | 261. | 61. | 19. | 40. | 183. | 561. | 1065. | 1518. | 8448. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 35. | 124. | 226. | 182. | 29. | 0. | 0. | 0. | 598. |