| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.7 | 27.0 | 39.4 | 55.0 | 68.6 | 77.8 | 81.1 | 78.7 | 71.1 | 58.8 | 39.9 | 25.5 | 53.6 |
| Highest Mean Max. Temperature (F) | 35.2 | 39.5 | 50.6 | 64.6 | 77.6 | 86.8 | 86.3 | 86.1 | 77.5 | 66.5 | 52.7 | 35.1 | 86.8 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1974 | 1983 | 1998 | 1975 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 7.0 | 15.6 | 30.2 | 44.5 | 61.8 | 71.8 | 72.4 | 73.4 | 62.5 | 54.1 | 31.0 | 11.4 | 7.0 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1972 | 1991 | 1983 | 1979 |
| Mean Temperature (F) | 11.8 | 18.3 | 30.8 | 44.5 | 58.0 | 67.6 | 71.2 | 68.7 | 59.8 | 47.9 | 31.4 | 17.5 | 44.0 |
| Highest Mean Temperature (F) | 25.0 | 29.7 | 40.0 | 52.2 | 66.3 | 73.3 | 75.3 | 73.9 | 64.8 | 54.2 | 40.6 | 25.2 | 75.3 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1974 | 1983 | 1978 | 1973 | 1999 | 1998 | 1974 |
| Lowest Mean Temperature (F) | -1.0 | 6.1 | 21.8 | 37.4 | 50.4 | 62.1 | 64.0 | 63.4 | 53.5 | 42.3 | 23.7 | 3.5 | -1.0 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1987 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 2.8 | 9.5 | 22.1 | 33.9 | 47.3 | 57.3 | 61.3 | 58.7 | 48.5 | 36.9 | 22.9 | 9.5 | 34.2 |
| Highest Mean Min. Temperature (F) | 14.7 | 23.2 | 31.1 | 40.1 | 55.1 | 62.1 | 64.6 | 63.8 | 52.9 | 44.0 | 29.1 | 18.7 | 64.6 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1987 | 1995 | 1978 | 1973 | 1987 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -10.0 | -3.5 | 13.3 | 28.0 | 38.9 | 52.5 | 55.5 | 53.4 | 44.1 | 29.4 | 15.3 | -4.5 | -10.0 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1982 | 1997 | 1982 | 1992 | 1992 | 1974 | 1987 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 0.98 | 0.72 | 2.09 | 3.20 | 3.92 | 4.50 | 4.35 | 4.88 | 3.28 | 2.31 | 1.98 | 1.10 | 33.31 |
| Highest Precipitation (in.) | 2.14 | 3.08 | 4.45 | 6.70 | 7.49 | 8.98 | 11.58 | 12.92 | 9.13 | 5.76 | 5.65 | 2.70 | 12.92 |
| Year Highest Occurred | 1971 | 1971 | 1990 | 1999 | 1991 | 1978 | 1990 | 1990 | 1972 | 1984 | 1991 | 1982 | 1990 |
| Lowest Precipitation (in.) | 0.11 | 0.00 | 0.00 | 0.41 | 1.04 | 1.30 | 0.83 | 0.61 | 0.57 | 0.21 | 0.02 | 0.01 | 0.00 |
| Year Lowest Occurred | 1981 | 1996 | 1994 | 1971 | 1988 | 1988 | 1976 | 1971 | 1975 | 1975 | 1980 | 1989 | 1996 |
| Heating Degree Days (F) | 1651. | 1308. | 1061. | 619. | 264. | 53. | 19. | 39. | 182. | 532. | 1009. | 1472. | 8209. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 45. | 130. | 210. | 153. | 26. | 0. | 0. | 0. | 566. |