| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 9.9 | 17.3 | 29.4 | 48.3 | 64.8 | 72.9 | 76.7 | 76.6 | 65.6 | 51.3 | 30.1 | 15.3 | 46.5 |
| Highest Mean Max. Temperature (F) | 24.2 | 29.4 | 41.6 | 60.4 | 75.5 | 85.1 | 84.4 | 85.4 | 73.4 | 56.3 | 45.3 | 29.7 | 85.4 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1980 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1999 | 1983 |
| Lowest Mean Max. Temperature (F) | -4.3 | 0.3 | 20.2 | 33.0 | 53.6 | 65.1 | 67.6 | 68.6 | 59.4 | 44.7 | 18.7 | 2.0 | -4.3 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1974 | 1985 | 1992 | 1985 | 1985 | 1991 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 0.4 | 7.6 | 20.2 | 37.8 | 52.6 | 61.5 | 65.4 | 64.2 | 53.5 | 40.2 | 21.5 | 6.6 | 36.0 |
| Highest Mean Temperature (F) | 14.3 | 22.9 | 31.6 | 46.7 | 62.8 | 71.1 | 71.2 | 71.0 | 59.2 | 46.3 | 33.2 | 22.1 | 71.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -13.9 | -9.1 | 10.8 | 26.2 | 44.4 | 54.4 | 58.0 | 58.0 | 48.6 | 34.9 | 9.7 | -6.1 | -13.9 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1991 | 1996 | 1983 | 1982 |
| Mean Min. Temperature (F) | -9.1 | -2.1 | 11.0 | 27.2 | 40.3 | 50.0 | 54.0 | 51.8 | 41.3 | 29.1 | 12.9 | -2.2 | 25.4 |
| Highest Mean Min. Temperature (F) | 4.4 | 17.2 | 22.8 | 34.2 | 50.0 | 57.0 | 57.9 | 56.6 | 45.6 | 36.4 | 23.7 | 15.8 | 57.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1978 | 1973 | 1981 | 1997 | 1989 |
| Lowest Mean Min. Temperature (F) | -23.5 | -18.6 | 1.3 | 19.3 | 33.3 | 43.2 | 48.3 | 46.0 | 36.5 | 23.5 | 0.6 | -14.4 | -23.5 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1982 | 1992 | 1977 | 1984 | 1993 | 1996 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.42 | 0.39 | 0.61 | 1.00 | 2.36 | 3.33 | 3.18 | 2.73 | 1.66 | 1.38 | 0.66 | 0.39 | 18.11 |
| Highest Precipitation (in.) | 1.74 | 1.47 | 2.66 | 2.69 | 6.29 | 7.02 | 9.19 | 7.11 | 3.95 | 4.70 | 3.05 | 1.05 | 9.19 |
| Year Highest Occurred | 1982 | 1987 | 1971 | 1986 | 1974 | 1993 | 1993 | 1985 | 1977 | 1994 | 2000 | 1992 | 1993 |
| Lowest Precipitation (in.) | 0.00 | 0.03 | 0.10 | 0.00 | 0.32 | 0.52 | 0.75 | 0.44 | 0.35 | 0.11 | 0.05 | 0.05 | 0.00 |
| Year Lowest Occurred | 1973 | 1993 | 1986 | 1988 | 1976 | 1988 | 1976 | 1998 | 1998 | 1999 | 1987 | 1983 | 1973 |
| Heating Degree Days (F) | 2004. | 1609. | 1389. | 818. | 406. | 167. | 88. | 121. | 356. | 768. | 1305. | 1814. | 10845. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 19. | 60. | 100. | 97. | 8. | 0. | 0. | 0. | 285. |