| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.0 | 26.0 | 37.5 | 53.9 | 67.2 | 76.1 | 80.1 | 77.9 | 68.1 | 56.3 | 37.7 | 23.2 | 51.9 |
| Highest Mean Max. Temperature (F) | 31.2 | 38.0 | 47.2 | 64.3 | 76.5 | 83.9 | 87.8 | 83.8 | 76.9 | 62.4 | 48.3 | 31.7 | 87.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1988 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 8.3 | 17.0 | 29.2 | 44.7 | 60.4 | 70.8 | 73.2 | 73.8 | 61.8 | 51.2 | 28.6 | 11.4 | 8.3 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1975 | 1974 | 1993 | 1992 | 1985 | 1993 | 1987 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 8.9 | 16.0 | 28.7 | 43.5 | 56.3 | 65.1 | 69.5 | 67.2 | 57.6 | 46.3 | 30.2 | 14.9 | 42.0 |
| Highest Mean Temperature (F) | 21.4 | 30.3 | 38.7 | 51.1 | 65.2 | 70.3 | 74.0 | 71.8 | 63.5 | 52.8 | 38.0 | 24.9 | 74.0 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -2.1 | 5.8 | 19.1 | 37.8 | 49.9 | 60.5 | 62.9 | 62.5 | 51.7 | 41.2 | 21.9 | 2.2 | -2.1 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1995 | 1983 | 1985 | 1992 | 1992 | 1993 | 1987 | 1995 | 1983 | 1982 |
| Mean Min. Temperature (F) | -1.2 | 5.9 | 19.8 | 33.0 | 45.3 | 54.1 | 58.8 | 56.4 | 47.1 | 36.2 | 22.6 | 6.6 | 32.1 |
| Highest Mean Min. Temperature (F) | 11.7 | 22.6 | 32.3 | 39.8 | 53.9 | 58.9 | 62.1 | 62.3 | 52.1 | 44.8 | 28.2 | 18.1 | 62.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1999 | 1995 | 1978 | 1971 | 1972 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -14.4 | -5.5 | 8.9 | 27.2 | 38.8 | 48.6 | 52.5 | 51.3 | 40.8 | 30.8 | 13.7 | -8.1 | -14.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1971 | 1985 | 1992 | 1992 | 1974 | 1988 | 1976 | 1985 | 1982 |
| Mean Precipitation (in.) | 1.08 | 0.77 | 1.83 | 2.61 | 3.12 | 4.31 | 3.88 | 4.64 | 4.17 | 2.50 | 2.05 | 1.07 | 32.03 |
| Highest Precipitation (in.) | 2.96 | 2.32 | 3.80 | 5.32 | 5.96 | 8.24 | 8.34 | 10.17 | 8.30 | 5.08 | 6.27 | 3.46 | 10.17 |
| Year Highest Occurred | 1982 | 1981 | 1976 | 1975 | 1973 | 1972 | 1999 | 1989 | 1985 | 1982 | 1991 | 1982 | 1989 |
| Lowest Precipitation (in.) | 0.03 | 0.10 | 0.39 | 0.16 | 0.83 | 1.57 | 1.10 | 0.71 | 1.47 | 0.62 | 0.22 | 0.24 | 0.03 |
| Year Lowest Occurred | 1981 | 1997 | 1978 | 1987 | 1976 | 1987 | 1975 | 1976 | 1976 | 1976 | 1976 | 1976 | 1981 |
| Heating Degree Days (F) | 1740. | 1375. | 1126. | 647. | 307. | 86. | 29. | 52. | 242. | 582. | 1045. | 1554. | 8785. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 36. | 89. | 167. | 120. | 19. | 0. | 0. | 0. | 432. |