| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.3 | 26.0 | 37.0 | 51.9 | 65.6 | 73.3 | 77.5 | 75.4 | 66.2 | 54.4 | 37.1 | 23.6 | 50.6 |
| Highest Mean Max. Temperature (F) | 31.3 | 39.8 | 47.1 | 61.1 | 76.0 | 78.8 | 82.7 | 80.4 | 76.3 | 61.8 | 47.4 | 32.9 | 82.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1998 | 1998 | 1995 | 1988 | 1998 | 1998 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 9.8 | 17.4 | 28.6 | 44.6 | 57.9 | 67.3 | 70.4 | 71.5 | 59.8 | 47.5 | 28.1 | 12.6 | 9.8 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1995 | 1973 | 1982 | 1992 | 1985 | 1993 | 1987 | 1995 | 1983 | 1979 |
| Mean Temperature (F) | 8.1 | 14.0 | 26.2 | 40.4 | 52.9 | 61.1 | 65.6 | 63.5 | 54.5 | 43.5 | 28.7 | 14.2 | 39.4 |
| Highest Mean Temperature (F) | 19.5 | 30.3 | 35.7 | 46.6 | 60.5 | 65.9 | 70.2 | 68.5 | 61.3 | 50.9 | 36.4 | 23.5 | 70.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1998 | 1998 | 1995 | 1999 | 1995 | 1998 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Temperature (F) | -2.7 | 3.5 | 17.7 | 34.3 | 47.0 | 54.0 | 59.2 | 58.2 | 48.8 | 37.3 | 19.5 | 2.3 | -2.7 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1975 | 1983 | 1982 | 1992 | 1977 | 1993 | 1987 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | -3.2 | 2.0 | 15.3 | 28.8 | 40.2 | 48.8 | 53.6 | 51.6 | 42.8 | 32.6 | 20.2 | 4.8 | 28.1 |
| Highest Mean Min. Temperature (F) | 10.1 | 20.7 | 27.3 | 35.4 | 46.5 | 54.6 | 58.4 | 59.3 | 47.3 | 41.8 | 26.4 | 16.7 | 59.3 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1991 | 1991 | 1999 | 1995 | 1990 | 1971 | 1988 | 1987 | 1995 |
| Lowest Mean Min. Temperature (F) | -15.9 | -10.4 | 6.6 | 22.9 | 33.7 | 40.7 | 48.0 | 44.8 | 34.9 | 23.8 | 8.3 | -9.4 | -15.9 |
| Year Lowest Occurred | 1977 | 1989 | 1971 | 1975 | 1971 | 1982 | 1992 | 1977 | 1976 | 1976 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 0.94 | 0.67 | 1.47 | 2.26 | 3.33 | 4.09 | 4.04 | 4.19 | 4.28 | 2.68 | 1.98 | 1.06 | 30.99 |
| Highest Precipitation (in.) | 2.23 | 1.96 | 3.25 | 4.38 | 8.41 | 7.73 | 8.89 | 10.37 | 10.97 | 5.17 | 7.23 | 2.83 | 10.97 |
| Year Highest Occurred | 1997 | 1971 | 1973 | 1977 | 1973 | 2000 | 1999 | 1995 | 1994 | 1995 | 1991 | 1984 | 1994 |
| Lowest Precipitation (in.) | 0.05 | 0.03 | 0.21 | 0.11 | 0.57 | 1.31 | 0.92 | 1.60 | 0.66 | 0.60 | 0.23 | 0.31 | 0.03 |
| Year Lowest Occurred | 1981 | 1997 | 1978 | 1980 | 1986 | 1983 | 1998 | 1976 | 1976 | 1976 | 1976 | 1986 | 1997 |
| Heating Degree Days (F) | 1767. | 1428. | 1205. | 741. | 394. | 155. | 68. | 110. | 321. | 667. | 1090. | 1575. | 9521. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 19. | 37. | 84. | 63. | 6. | 0. | 0. | 0. | 209. |