| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.9 | 27.3 | 39.4 | 54.9 | 68.9 | 78.7 | 82.2 | 79.7 | 71.5 | 58.9 | 40.2 | 25.6 | 54.0 |
| Highest Mean Max. Temperature (F) | 34.8 | 41.3 | 50.3 | 64.0 | 78.1 | 87.5 | 89.7 | 87.8 | 79.1 | 68.3 | 52.4 | 35.5 | 89.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1988 | 1988 | 1983 | 1983 | 1998 | 1975 | 1999 | 1998 | 1983 |
| Lowest Mean Max. Temperature (F) | 7.3 | 13.2 | 31.1 | 45.0 | 61.8 | 72.5 | 73.8 | 74.7 | 64.2 | 52.3 | 30.8 | 11.7 | 7.3 |
| Year Lowest Occurred | 1978 | 1978 | 1984 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1977 | 1991 | 1983 | 1978 |
| Mean Temperature (F) | 11.5 | 18.1 | 30.6 | 44.6 | 58.0 | 67.7 | 71.7 | 69.2 | 60.1 | 47.7 | 31.5 | 17.0 | 44.0 |
| Highest Mean Temperature (F) | 25.0 | 30.7 | 40.1 | 51.5 | 64.5 | 73.2 | 77.8 | 75.9 | 66.4 | 53.4 | 41.1 | 25.8 | 77.8 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1975 | 1999 | 1998 | 1983 |
| Lowest Mean Temperature (F) | -4.3 | 2.5 | 22.5 | 37.2 | 51.6 | 62.4 | 64.9 | 64.4 | 54.8 | 42.3 | 24.1 | 2.7 | -4.3 |
| Year Lowest Occurred | 1979 | 1979 | 1979 | 1979 | 1997 | 1982 | 1992 | 1992 | 1993 | 1977 | 1991 | 1983 | 1979 |
| Mean Min. Temperature (F) | 2.1 | 8.9 | 21.8 | 34.3 | 47.1 | 56.7 | 61.2 | 58.6 | 48.7 | 36.4 | 22.7 | 8.4 | 33.9 |
| Highest Mean Min. Temperature (F) | 15.2 | 23.1 | 29.9 | 40.3 | 52.9 | 62.6 | 65.8 | 64.3 | 53.6 | 41.5 | 29.7 | 19.6 | 65.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1985 | 1977 | 1991 | 1983 | 1995 | 1998 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -16.4 | -11.3 | 12.3 | 26.3 | 39.0 | 52.2 | 55.1 | 52.7 | 44.7 | 30.2 | 14.2 | -6.4 | -16.4 |
| Year Lowest Occurred | 1979 | 1979 | 1979 | 1979 | 1971 | 1972 | 1971 | 1977 | 1976 | 1976 | 1976 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.87 | 0.67 | 2.02 | 3.39 | 4.18 | 4.79 | 4.15 | 4.51 | 3.05 | 2.52 | 2.00 | 1.00 | 33.15 |
| Highest Precipitation (in.) | 2.57 | 3.19 | 4.44 | 7.76 | 9.16 | 10.09 | 9.78 | 11.74 | 7.96 | 6.84 | 5.47 | 3.02 | 11.74 |
| Year Highest Occurred | 1975 | 1971 | 1983 | 1999 | 1982 | 1993 | 1999 | 1980 | 1973 | 1984 | 1991 | 1982 | 1980 |
| Lowest Precipitation (in.) | 0.08 | 0.00 | 0.19 | 0.56 | 1.21 | 1.40 | 1.10 | 0.87 | 0.50 | 0.23 | 0.05 | 0.12 | 0.00 |
| Year Lowest Occurred | 1995 | 1987 | 1994 | 2000 | 1989 | 1988 | 1996 | 1971 | 1990 | 1975 | 1980 | 1998 | 1987 |
| Heating Degree Days (F) | 1659. | 1314. | 1066. | 614. | 260. | 46. | 20. | 37. | 175. | 539. | 1006. | 1487. | 8223. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 42. | 128. | 227. | 166. | 28. | 1. | 0. | 0. | 594. |