| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.7 | 27.5 | 38.6 | 54.6 | 69.0 | 76.7 | 81.0 | 78.2 | 68.5 | 55.8 | 36.8 | 23.4 | 52.5 |
| Highest Mean Max. Temperature (F) | 31.9 | 38.0 | 47.8 | 66.1 | 78.2 | 82.4 | 88.1 | 83.6 | 75.6 | 61.1 | 46.6 | 31.2 | 88.1 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 9.1 | 18.3 | 31.0 | 45.1 | 61.2 | 72.2 | 72.4 | 73.0 | 61.8 | 51.2 | 28.9 | 11.5 | 9.1 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1975 | 1997 | 2000 | 1992 | 1985 | 1993 | 1987 | 1991 | 1983 | 1994 |
| Mean Temperature (F) | 8.5 | 15.6 | 27.4 | 41.4 | 54.0 | 62.2 | 67.6 | 65.8 | 56.5 | 44.7 | 28.6 | 13.9 | 40.5 |
| Highest Mean Temperature (F) | 20.1 | 30.1 | 36.3 | 47.5 | 61.3 | 66.5 | 71.6 | 70.0 | 63.2 | 49.8 | 37.7 | 25.0 | 71.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1988 | 1998 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -3.3 | 4.2 | 18.8 | 33.7 | 48.5 | 56.7 | 60.4 | 60.5 | 51.3 | 39.1 | 20.8 | 0.1 | -3.3 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1975 | 1979 | 1985 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -2.7 | 3.6 | 16.2 | 28.1 | 39.0 | 47.7 | 54.1 | 53.3 | 44.5 | 33.6 | 20.3 | 4.4 | 28.5 |
| Highest Mean Min. Temperature (F) | 10.0 | 23.2 | 25.4 | 33.9 | 45.5 | 53.3 | 58.2 | 59.4 | 50.8 | 41.7 | 28.8 | 19.0 | 59.4 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1998 | 1991 | 1999 | 1999 | 1995 | 1998 | 1994 | 1999 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -16.7 | -11.4 | 5.0 | 22.2 | 33.7 | 40.7 | 48.4 | 47.2 | 37.3 | 25.5 | 9.5 | -11.3 | -16.7 |
| Year Lowest Occurred | 1982 | 1988 | 1975 | 1975 | 1971 | 1985 | 1992 | 1977 | 1974 | 1976 | 1976 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.94 | 0.69 | 1.48 | 1.92 | 2.99 | 4.50 | 4.35 | 4.07 | 3.51 | 2.49 | 1.86 | 0.83 | 29.63 |
| Highest Precipitation (in.) | 3.39 | 2.13 | 3.97 | 4.90 | 4.65 | 7.70 | 11.35 | 7.39 | 7.54 | 8.22 | 4.65 | 2.08 | 11.35 |
| Year Highest Occurred | 1975 | 1971 | 1977 | 1994 | 1991 | 1996 | 1972 | 1990 | 1986 | 1971 | 1996 | 1982 | 1972 |
| Lowest Precipitation (in.) | 0.05 | 0.04 | 0.49 | 0.10 | 0.53 | 1.30 | 1.18 | 0.64 | 0.57 | 0.40 | 0.29 | 0.09 | 0.04 |
| Year Lowest Occurred | 1981 | 1982 | 1993 | 1980 | 1976 | 1987 | 1989 | 1976 | 1974 | 1976 | 1976 | 1999 | 1982 |
| Heating Degree Days (F) | 1753. | 1385. | 1166. | 710. | 353. | 125. | 46. | 83. | 268. | 628. | 1094. | 1585. | 9196. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 12. | 41. | 125. | 105. | 13. | 0. | 0. | 0. | 296. |