| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.0 | 24.0 | 34.8 | 49.8 | 63.8 | 72.7 | 77.0 | 74.6 | 64.6 | 52.1 | 33.8 | 20.3 | 48.6 |
| Highest Mean Max. Temperature (F) | 25.8 | 36.5 | 43.9 | 61.8 | 72.7 | 80.7 | 85.3 | 80.7 | 70.5 | 58.0 | 44.4 | 30.2 | 85.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1989 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.5 | 14.8 | 29.0 | 40.7 | 55.8 | 66.9 | 70.6 | 69.5 | 58.6 | 47.7 | 25.9 | 10.1 | 6.5 |
| Year Lowest Occurred | 1977 | 1979 | 1989 | 1975 | 1979 | 2000 | 1992 | 1977 | 1993 | 1980 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 3.3 | 10.3 | 22.5 | 36.8 | 49.6 | 58.9 | 63.5 | 61.1 | 52.3 | 40.5 | 24.7 | 9.6 | 36.1 |
| Highest Mean Temperature (F) | 15.5 | 27.5 | 31.3 | 43.9 | 57.1 | 64.1 | 67.2 | 66.2 | 56.0 | 46.0 | 33.8 | 21.2 | 67.2 |
| Year Highest Occurred | 1998 | 1998 | 2000 | 1987 | 1977 | 1995 | 1988 | 1983 | 1978 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -7.0 | -0.6 | 15.4 | 29.4 | 43.1 | 52.7 | 58.0 | 56.0 | 47.1 | 35.3 | 15.8 | -1.4 | -7.0 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | -9.4 | -3.5 | 10.2 | 23.7 | 35.3 | 45.0 | 49.9 | 47.6 | 39.9 | 28.8 | 15.6 | -1.2 | 23.5 |
| Highest Mean Min. Temperature (F) | 8.8 | 18.4 | 20.2 | 28.8 | 41.5 | 48.6 | 53.4 | 51.6 | 44.0 | 35.3 | 23.2 | 12.2 | 53.4 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1977 | 1995 | 1987 | 1983 | 1978 | 1971 | 1999 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -21.7 | -16.3 | 1.4 | 18.1 | 30.3 | 38.3 | 45.4 | 42.4 | 34.7 | 22.2 | 5.7 | -13.2 | -21.7 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1975 | 1971 | 1982 | 1992 | 1977 | 1974 | 1976 | 1995 | 1976 | 1982 |
| Mean Precipitation (in.) | 1.10 | 0.76 | 1.65 | 1.93 | 2.82 | 4.10 | 4.35 | 4.03 | 3.61 | 2.58 | 1.86 | 1.01 | 29.80 |
| Highest Precipitation (in.) | 3.44 | 2.34 | 5.50 | 4.73 | 7.37 | 7.67 | 9.82 | 9.89 | 7.32 | 6.35 | 4.34 | 1.98 | 9.89 |
| Year Highest Occurred | 1975 | 1998 | 1975 | 1981 | 1987 | 1994 | 1999 | 1988 | 1977 | 1971 | 1991 | 1977 | 1988 |
| Lowest Precipitation (in.) | 0.35 | 0.09 | 0.35 | 0.00 | 0.38 | 0.55 | 1.63 | 1.45 | 0.91 | 0.58 | 0.28 | 0.11 | 0.00 |
| Year Lowest Occurred | 1985 | 1993 | 1987 | 1988 | 1976 | 1995 | 1998 | 1976 | 1974 | 1987 | 1976 | 1997 | 1988 |
| Heating Degree Days (F) | 1914. | 1534. | 1317. | 849. | 484. | 204. | 101. | 156. | 383. | 762. | 1210. | 1720. | 10634. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 6. | 19. | 51. | 36. | 1. | 0. | 0. | 0. | 113. |