| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 13.3 | 21.0 | 33.7 | 51.5 | 66.7 | 74.2 | 78.5 | 77.4 | 66.8 | 53.7 | 33.1 | 19.0 | 49.1 |
| Highest Mean Max. Temperature (F) | 27.0 | 33.6 | 43.5 | 64.0 | 76.4 | 80.3 | 86.3 | 83.6 | 74.8 | 59.4 | 47.0 | 30.7 | 86.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1976 | 1998 | 1973 | 1999 | 1979 | 1989 |
| Lowest Mean Max. Temperature (F) | 1.9 | 6.9 | 23.2 | 40.9 | 57.6 | 67.6 | 71.1 | 71.4 | 59.8 | 48.6 | 23.5 | 5.0 | 1.9 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1975 | 1979 | 1985 | 1992 | 1985 | 1985 | 1987 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 2.6 | 10.2 | 23.5 | 39.8 | 54.3 | 62.7 | 66.7 | 65.0 | 54.5 | 42.6 | 24.7 | 9.7 | 38.0 |
| Highest Mean Temperature (F) | 16.8 | 27.8 | 33.5 | 48.4 | 64.3 | 68.6 | 71.8 | 69.9 | 60.7 | 48.9 | 35.6 | 22.1 | 71.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1989 | 1976 | 1998 | 1973 | 1999 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -9.6 | -4.6 | 11.6 | 32.1 | 46.6 | 55.7 | 59.5 | 59.5 | 49.4 | 37.9 | 13.7 | -3.5 | -9.6 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -8.1 | -0.7 | 13.2 | 28.0 | 41.8 | 51.2 | 54.8 | 52.5 | 42.2 | 31.4 | 16.2 | 0.4 | 26.9 |
| Highest Mean Min. Temperature (F) | 6.6 | 22.0 | 23.7 | 32.9 | 52.2 | 57.6 | 58.3 | 58.0 | 47.3 | 38.8 | 25.0 | 15.8 | 58.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1995 | 1987 | 1973 | 1978 | 1994 | 1981 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -22.4 | -16.2 | 0.0 | 21.6 | 33.7 | 43.1 | 48.0 | 47.4 | 35.8 | 24.9 | 3.9 | -12.6 | -22.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1985 | 1982 |
| Mean Precipitation (in.) | 0.63 | 0.50 | 0.91 | 1.36 | 2.68 | 4.40 | 4.06 | 3.50 | 2.87 | 2.37 | 1.01 | 0.55 | 24.84 |
| Highest Precipitation (in.) | 2.42 | 1.27 | 1.91 | 4.76 | 7.24 | 9.70 | 9.44 | 9.72 | 10.04 | 10.14 | 3.45 | 1.33 | 10.14 |
| Year Highest Occurred | 1989 | 1984 | 1995 | 1991 | 1985 | 1997 | 1995 | 1992 | 1973 | 1984 | 1977 | 1972 | 1984 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.06 | 0.00 | 0.41 | 1.27 | 0.64 | 0.47 | 0.44 | 0.15 | 0.00 | 0.06 | 0.00 |
| Year Lowest Occurred | 1973 | 1989 | 1986 | 1980 | 1976 | 1974 | 1984 | 1996 | 1979 | 1992 | 1990 | 1994 | 1973 |
| Heating Degree Days (F) | 1937. | 1538. | 1289. | 758. | 358. | 132. | 64. | 94. | 325. | 697. | 1210. | 1714. | 10116. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 25. | 63. | 115. | 93. | 10. | 0. | 0. | 0. | 306. |