| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.1 | 25.6 | 37.5 | 54.7 | 68.6 | 76.6 | 82.8 | 82.4 | 71.3 | 57.7 | 36.5 | 22.7 | 52.9 |
| Highest Mean Max. Temperature (F) | 33.8 | 37.0 | 47.7 | 68.4 | 77.5 | 89.2 | 88.2 | 89.1 | 78.4 | 63.2 | 51.8 | 36.9 | 89.2 |
| Year Highest Occurred | 1992 | 1991 | 2000 | 1977 | 1977 | 1988 | 1988 | 1983 | 1998 | 1974 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 3.0 | 9.2 | 30.1 | 39.2 | 61.9 | 68.7 | 74.1 | 75.0 | 61.8 | 52.6 | 23.1 | 5.9 | 3.0 |
| Year Lowest Occurred | 1978 | 1979 | 1996 | 1975 | 1979 | 1985 | 1993 | 1977 | 1985 | 1980 | 1985 | 1983 | 1978 |
| Mean Temperature (F) | 7.7 | 15.0 | 27.1 | 42.5 | 55.8 | 64.5 | 69.9 | 68.5 | 57.6 | 44.6 | 26.3 | 12.9 | 41.0 |
| Highest Mean Temperature (F) | 22.8 | 28.2 | 35.5 | 52.5 | 63.4 | 74.6 | 74.7 | 74.6 | 63.6 | 48.9 | 38.3 | 25.5 | 74.7 |
| Year Highest Occurred | 1992 | 1998 | 2000 | 1977 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1999 | 1989 |
| Lowest Mean Temperature (F) | -7.7 | -2.2 | 19.1 | 32.4 | 49.6 | 58.6 | 64.0 | 61.2 | 52.4 | 39.8 | 14.8 | -3.0 | -7.7 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1975 | 1979 | 1985 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -2.8 | 4.4 | 16.7 | 30.2 | 42.9 | 52.4 | 57.0 | 54.5 | 43.9 | 31.5 | 16.0 | 3.0 | 29.1 |
| Highest Mean Min. Temperature (F) | 11.8 | 21.3 | 25.0 | 36.6 | 49.2 | 60.0 | 61.3 | 60.0 | 48.7 | 38.0 | 24.8 | 17.1 | 61.3 |
| Year Highest Occurred | 1992 | 1998 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1994 | 1999 | 1997 | 1989 |
| Lowest Mean Min. Temperature (F) | -19.2 | -13.6 | 8.1 | 24.3 | 36.4 | 47.0 | 51.5 | 47.4 | 37.1 | 25.0 | 6.4 | -12.0 | -19.2 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1981 | 1972 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.48 | 0.44 | 0.98 | 1.51 | 2.53 | 3.24 | 2.95 | 2.01 | 1.90 | 1.55 | 0.74 | 0.44 | 18.77 |
| Highest Precipitation (in.) | 1.89 | 1.41 | 2.73 | 4.64 | 8.62 | 8.73 | 13.11 | 6.67 | 6.44 | 4.91 | 2.30 | 1.05 | 13.11 |
| Year Highest Occurred | 1996 | 1998 | 1988 | 1976 | 1999 | 1990 | 1993 | 1998 | 1994 | 1982 | 1996 | 1993 | 1993 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.08 | 0.00 | 0.23 | 1.16 | 0.60 | 0.29 | 0.05 | 0.08 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1988 | 1988 | 1978 | 1987 | 1984 | 1974 | 1985 | 1971 | 1974 | 1987 | 1999 | 1986 | 1988 |
| Heating Degree Days (F) | 1779. | 1401. | 1176. | 679. | 308. | 114. | 26. | 63. | 250. | 632. | 1163. | 1617. | 9208. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 22. | 99. | 179. | 170. | 29. | 0. | 0. | 0. | 501. |