| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.4 | 24.9 | 37.3 | 54.8 | 69.4 | 76.8 | 81.4 | 79.4 | 68.8 | 55.4 | 34.6 | 20.6 | 51.7 |
| Highest Mean Max. Temperature (F) | 29.0 | 35.1 | 47.0 | 68.6 | 79.7 | 85.0 | 86.9 | 86.0 | 75.9 | 61.2 | 47.3 | 30.6 | 86.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1976 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 4.5 | 13.0 | 27.4 | 44.3 | 60.1 | 70.9 | 72.6 | 73.3 | 63.4 | 51.2 | 26.0 | 7.6 | 4.5 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1979 | 1982 | 1992 | 1985 | 1993 | 1980 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 5.2 | 13.2 | 26.1 | 41.9 | 55.8 | 64.1 | 69.0 | 67.0 | 56.9 | 44.3 | 26.1 | 11.0 | 40.1 |
| Highest Mean Temperature (F) | 17.2 | 28.5 | 35.5 | 52.6 | 65.0 | 70.3 | 72.9 | 72.0 | 62.8 | 50.0 | 36.7 | 22.3 | 72.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1974 | 1983 | 1998 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -7.4 | -0.9 | 15.8 | 34.4 | 47.9 | 56.7 | 62.1 | 61.0 | 51.1 | 39.7 | 17.9 | -4.0 | -7.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -6.1 | 1.4 | 14.8 | 28.9 | 42.2 | 51.4 | 56.5 | 54.6 | 44.9 | 33.1 | 17.5 | 1.3 | 28.4 |
| Highest Mean Min. Temperature (F) | 6.3 | 21.9 | 24.7 | 36.6 | 50.2 | 56.9 | 61.7 | 58.6 | 49.6 | 39.1 | 26.1 | 15.5 | 61.7 |
| Year Highest Occurred | 1992 | 1998 | 1987 | 1987 | 1977 | 1991 | 1987 | 1973 | 1986 | 1994 | 1999 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -19.4 | -14.7 | 4.1 | 23.0 | 35.3 | 42.5 | 51.0 | 47.5 | 37.6 | 26.7 | 9.9 | -15.6 | -19.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1982 | 1984 | 1982 | 1971 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.65 | 0.50 | 1.15 | 1.71 | 2.83 | 4.21 | 4.09 | 3.82 | 2.88 | 2.55 | 1.13 | 0.58 | 26.10 |
| Highest Precipitation (in.) | 1.70 | 1.62 | 2.13 | 4.35 | 6.00 | 8.97 | 11.59 | 9.53 | 5.31 | 6.54 | 3.82 | 1.90 | 11.59 |
| Year Highest Occurred | 1975 | 1979 | 1995 | 1986 | 1993 | 1994 | 1985 | 1989 | 1996 | 1971 | 1977 | 1987 | 1985 |
| Lowest Precipitation (in.) | 0.05 | 0.02 | 0.40 | 0.19 | 0.20 | 1.23 | 0.44 | 1.33 | 0.38 | 0.18 | 0.08 | 0.14 | 0.02 |
| Year Lowest Occurred | 1981 | 1993 | 1986 | 1987 | 1976 | 1987 | 1984 | 1975 | 1974 | 1992 | 1999 | 1975 | 1993 |
| Heating Degree Days (F) | 1857. | 1451. | 1207. | 697. | 320. | 109. | 36. | 57. | 261. | 643. | 1170. | 1675. | 9483. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 35. | 82. | 158. | 118. | 17. | 0. | 0. | 0. | 412. |