| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.7 | 22.5 | 34.4 | 53.5 | 69.4 | 77.5 | 81.5 | 80.3 | 69.6 | 55.6 | 33.6 | 19.6 | 51.0 |
| Highest Mean Max. Temperature (F) | 29.7 | 33.2 | 46.1 | 65.2 | 78.7 | 88.4 | 89.0 | 88.9 | 77.4 | 61.3 | 48.2 | 33.0 | 89.0 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1974 | 1999 | 1999 | 1989 |
| Lowest Mean Max. Temperature (F) | -0.3 | 3.8 | 25.1 | 39.8 | 58.3 | 69.8 | 73.5 | 74.0 | 62.1 | 49.0 | 20.9 | 6.7 | -0.3 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1993 | 1977 | 1985 | 1991 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 5.9 | 13.5 | 25.5 | 42.0 | 56.4 | 65.2 | 69.4 | 67.5 | 57.3 | 44.7 | 25.8 | 11.5 | 40.4 |
| Highest Mean Temperature (F) | 18.9 | 27.4 | 36.1 | 50.1 | 65.5 | 72.1 | 74.2 | 74.9 | 63.3 | 50.1 | 37.5 | 26.0 | 74.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -8.7 | -3.4 | 15.7 | 32.0 | 48.0 | 58.4 | 62.0 | 61.6 | 51.9 | 38.2 | 13.1 | -0.2 | -8.7 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1985 | 1991 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -3.0 | 4.5 | 16.5 | 30.4 | 43.3 | 52.8 | 57.2 | 54.6 | 45.0 | 33.7 | 18.0 | 3.3 | 29.7 |
| Highest Mean Min. Temperature (F) | 8.1 | 22.4 | 27.9 | 35.5 | 52.3 | 58.4 | 61.4 | 60.8 | 50.1 | 39.9 | 27.1 | 20.2 | 61.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1998 | 1977 | 1995 | 1983 | 1983 | 1978 | 1994 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -17.1 | -10.7 | 6.2 | 24.1 | 37.3 | 47.1 | 50.3 | 49.2 | 39.4 | 27.4 | 5.2 | -7.2 | -17.1 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1982 | 1992 | 1977 | 1974 | 1991 | 1985 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.66 | 0.56 | 0.92 | 1.25 | 2.41 | 3.42 | 3.19 | 2.61 | 1.80 | 1.64 | 0.88 | 0.55 | 19.89 |
| Highest Precipitation (in.) | 2.09 | 2.02 | 1.96 | 3.62 | 6.99 | 6.29 | 8.92 | 6.58 | 5.59 | 4.82 | 3.13 | 1.39 | 8.92 |
| Year Highest Occurred | 1989 | 1987 | 1988 | 1986 | 1974 | 1981 | 1986 | 1980 | 1991 | 1998 | 2000 | 1988 | 1986 |
| Lowest Precipitation (in.) | 0.00 | 0.04 | 0.04 | 0.00 | 0.23 | 1.32 | 0.92 | 1.06 | 0.29 | 0.05 | 0.00 | 0.16 | 0.00 |
| Year Lowest Occurred | 1973 | 1973 | 1986 | 1988 | 1980 | 1988 | 1989 | 1971 | 1984 | 1976 | 1976 | 1997 | 1973 |
| Heating Degree Days (F) | 1836. | 1442. | 1225. | 693. | 301. | 92. | 31. | 74. | 254. | 630. | 1176. | 1660. | 9414. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 3. | 33. | 97. | 166. | 151. | 23. | 0. | 0. | 0. | 473. |