| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 17.0 | 23.9 | 36.1 | 54.7 | 69.1 | 78.2 | 83.6 | 82.5 | 71.3 | 57.7 | 36.7 | 22.9 | 52.8 |
| Highest Mean Max. Temperature (F) | 32.8 | 37.0 | 47.7 | 66.7 | 78.0 | 89.8 | 89.0 | 90.9 | 78.3 | 64.1 | 51.3 | 39.0 | 90.9 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1985 | 1985 | 1988 | 1988 | 1983 | 1998 | 1989 | 1999 | 1999 | 1983 |
| Lowest Mean Max. Temperature (F) | 3.0 | 8.0 | 26.9 | 41.9 | 59.3 | 71.3 | 74.8 | 76.5 | 64.8 | 52.7 | 25.4 | 7.1 | 3.0 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1993 | 1992 | 1977 | 1985 | 1980 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 6.9 | 13.8 | 26.4 | 42.1 | 55.9 | 65.3 | 70.5 | 68.6 | 57.1 | 44.4 | 27.1 | 13.3 | 41.0 |
| Highest Mean Temperature (F) | 22.7 | 27.7 | 35.9 | 49.1 | 63.6 | 73.9 | 75.4 | 76.0 | 63.9 | 49.4 | 38.4 | 26.8 | 76.0 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1973 | 1999 | 1999 | 1983 |
| Lowest Mean Temperature (F) | -8.0 | -3.2 | 18.0 | 33.2 | 47.5 | 60.5 | 63.8 | 63.0 | 51.9 | 39.3 | 15.9 | -2.4 | -8.0 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1975 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -3.3 | 3.7 | 16.6 | 29.4 | 42.7 | 52.4 | 57.4 | 54.7 | 42.8 | 31.1 | 17.5 | 3.6 | 29.1 |
| Highest Mean Min. Temperature (F) | 12.6 | 20.7 | 26.3 | 34.4 | 50.2 | 57.9 | 62.5 | 61.0 | 49.5 | 38.1 | 25.4 | 18.9 | 62.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1998 | 1977 | 1988 | 1983 | 1983 | 1998 | 1998 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -18.9 | -14.4 | 8.0 | 24.4 | 35.7 | 46.6 | 51.9 | 49.4 | 36.1 | 24.2 | 3.7 | -11.9 | -18.9 |
| Year Lowest Occurred | 1982 | 1979 | 1980 | 1979 | 1979 | 1982 | 1971 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.63 | 0.48 | 1.09 | 1.47 | 2.59 | 3.45 | 2.87 | 2.27 | 2.20 | 1.82 | 0.86 | 0.45 | 20.18 |
| Highest Precipitation (in.) | 1.71 | 1.78 | 3.10 | 6.64 | 6.78 | 16.14 | 8.53 | 5.26 | 6.77 | 6.84 | 3.49 | 1.68 | 16.14 |
| Year Highest Occurred | 1994 | 1979 | 1977 | 1986 | 1972 | 1975 | 1995 | 1972 | 1978 | 1998 | 1977 | 1972 | 1975 |
| Lowest Precipitation (in.) | 0.02 | 0.02 | 0.19 | 0.00 | 0.17 | 0.48 | 0.36 | 0.61 | 0.18 | 0.08 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1990 | 1983 | 1997 | 1988 | 1976 | 1987 | 1976 | 1984 | 1974 | 1991 | 1999 | 1986 | 1988 |
| Heating Degree Days (F) | 1805. | 1433. | 1198. | 689. | 310. | 85. | 29. | 55. | 263. | 638. | 1137. | 1606. | 9248. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 28. | 93. | 199. | 166. | 25. | 0. | 0. | 0. | 512. |