| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 25.3 | 30.9 | 42.4 | 53.8 | 64.7 | 75.2 | 79.8 | 77.8 | 70.9 | 60.3 | 42.7 | 29.3 | 54.4 |
| Highest Mean Max. Temperature (F) | 39.3 | 42.3 | 51.7 | 62.4 | 70.7 | 81.4 | 83.8 | 81.0 | 76.4 | 65.4 | 50.7 | 43.3 | 83.8 |
| Year Highest Occurred | 1981 | 1977 | 1999 | 1992 | 1996 | 1990 | 1989 | 1995 | 1979 | 1991 | 1999 | 1980 | 1989 |
| Lowest Mean Max. Temperature (F) | 6.9 | 15.9 | 30.4 | 43.4 | 58.6 | 70.9 | 75.6 | 74.5 | 66.0 | 50.4 | 32.9 | 18.2 | 6.9 |
| Year Lowest Occurred | 1984 | 1974 | 1984 | 1984 | 1995 | 1984 | 1992 | 1999 | 1986 | 1984 | 1992 | 1978 | 1984 |
| Mean Temperature (F) | 9.6 | 15.2 | 28.2 | 37.7 | 47.3 | 55.7 | 61.1 | 59.3 | 51.6 | 41.0 | 26.7 | 13.6 | 37.3 |
| Highest Mean Temperature (F) | 20.5 | 25.2 | 36.3 | 43.8 | 51.1 | 59.3 | 64.3 | 62.9 | 56.6 | 44.7 | 31.0 | 26.7 | 64.3 |
| Year Highest Occurred | 1981 | 1995 | 1990 | 1989 | 1996 | 1988 | 1998 | 1994 | 1990 | 1988 | 1981 | 1980 | 1998 |
| Lowest Mean Temperature (F) | -6.1 | -1.3 | 18.8 | 30.4 | 43.7 | 51.6 | 58.1 | 55.1 | 47.8 | 36.2 | 19.6 | 2.8 | -6.1 |
| Year Lowest Occurred | 1984 | 1974 | 1984 | 1984 | 1975 | 1975 | 1992 | 1976 | 1975 | 1976 | 2000 | 1978 | 1984 |
| Mean Min. Temperature (F) | -6.1 | -0.5 | 13.9 | 21.6 | 29.8 | 36.1 | 42.3 | 40.8 | 32.2 | 21.6 | 10.6 | -2.1 | 20.0 |
| Highest Mean Min. Temperature (F) | 5.1 | 13.2 | 21.5 | 27.6 | 32.6 | 41.0 | 48.1 | 45.8 | 38.1 | 31.1 | 16.3 | 10.1 | 48.1 |
| Year Highest Occurred | 1980 | 1986 | 1990 | 1990 | 1997 | 1988 | 1998 | 1994 | 1997 | 1972 | 1996 | 1980 | 1998 |
| Lowest Mean Min. Temperature (F) | -19.1 | -18.6 | 3.6 | 16.5 | 26.3 | 31.5 | 38.6 | 34.0 | 25.8 | 11.3 | 2.2 | -13.9 | -19.1 |
| Year Lowest Occurred | 1984 | 1974 | 1976 | 1975 | 1975 | 1975 | 1979 | 1975 | 1975 | 1975 | 1975 | 1975 | 1984 |
| Mean Precipitation (in.) | 0.77 | 0.60 | 0.54 | 0.63 | 0.82 | 0.60 | 1.24 | 1.70 | 0.99 | 0.73 | 0.57 | 0.76 | 9.95 |
| Highest Precipitation (in.) | 2.38 | 1.21 | 1.86 | 2.29 | 1.64 | 1.52 | 3.25 | 3.61 | 2.35 | 2.10 | 1.58 | 3.10 | 3.61 |
| Year Highest Occurred | 1979 | 1989 | 1995 | 1996 | 1995 | 1995 | 1981 | 1971 | 1990 | 1998 | 1983 | 1997 | 1971 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.00 | 0.01 | 0.06 | 0.02 | 0.15 | 0.14 | 0.02 | 0.09 | 0.01 | 0.00 | 0.00 |
| Year Lowest Occurred | 1991 | 1972 | 1977 | 1979 | 1974 | 1980 | 1979 | 1985 | 1978 | 1992 | 1989 | 1990 | 1991 |
| Heating Degree Days (F) | 1718. | 1396. | 1143. | 819. | 551. | 283. | 135. | 187. | 404. | 746. | 1150. | 1595. | 10127. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 3. | 12. | 11. | 0. | 0. | 0. | 0. | 26. |