| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.6 | 25.7 | 37.4 | 54.6 | 68.7 | 77.7 | 81.8 | 79.0 | 70.0 | 57.5 | 37.7 | 22.9 | 52.6 |
| Highest Mean Max. Temperature (F) | 34.5 | 40.3 | 49.3 | 66.2 | 78.3 | 87.8 | 89.9 | 86.2 | 77.9 | 63.2 | 50.1 | 32.9 | 89.9 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1988 | 1988 | 1988 | 1983 | 1998 | 1989 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 5.4 | 15.5 | 28.5 | 41.6 | 61.7 | 71.0 | 73.1 | 73.5 | 64.1 | 52.7 | 28.6 | 7.9 | 5.4 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1974 | 1993 | 1992 | 1992 | 1993 | 1995 | 1996 | 1983 | 1977 |
| Mean Temperature (F) | 8.8 | 16.2 | 28.2 | 44.1 | 57.7 | 66.9 | 71.2 | 68.6 | 59.0 | 46.5 | 29.5 | 14.4 | 42.6 |
| Highest Mean Temperature (F) | 24.2 | 29.2 | 38.4 | 52.5 | 65.2 | 74.5 | 76.5 | 74.1 | 64.9 | 51.6 | 39.8 | 24.5 | 76.5 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1988 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -5.5 | 4.9 | 18.5 | 34.8 | 51.3 | 61.8 | 64.4 | 64.3 | 53.7 | 39.7 | 20.8 | -0.6 | -5.5 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1977 |
| Mean Min. Temperature (F) | -1.1 | 6.6 | 19.0 | 33.6 | 46.7 | 56.1 | 60.6 | 58.2 | 47.9 | 35.5 | 21.3 | 5.8 | 32.5 |
| Highest Mean Min. Temperature (F) | 13.9 | 22.6 | 28.2 | 38.8 | 53.0 | 62.8 | 65.2 | 63.4 | 53.9 | 40.4 | 29.5 | 18.7 | 65.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1991 | 1991 | 1983 | 1995 | 1978 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -16.5 | -5.6 | 8.4 | 28.1 | 40.6 | 50.8 | 54.8 | 53.3 | 40.9 | 26.5 | 12.0 | -9.1 | -16.5 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1971 | 1977 | 1974 | 1976 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 0.79 | 0.67 | 1.55 | 2.35 | 3.37 | 4.89 | 4.02 | 3.67 | 2.92 | 2.15 | 1.50 | 0.68 | 28.56 |
| Highest Precipitation (in.) | 2.24 | 2.28 | 4.15 | 5.48 | 5.89 | 9.28 | 9.84 | 7.00 | 8.18 | 5.38 | 3.92 | 1.82 | 9.84 |
| Year Highest Occurred | 1975 | 1975 | 1977 | 1986 | 1998 | 1984 | 1986 | 1993 | 1991 | 1983 | 1977 | 1982 | 1986 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.25 | 0.23 | 1.15 | 0.39 | 0.57 | 0.20 | 0.81 | 0.07 | 0.05 | 0.05 | 0.00 |
| Year Lowest Occurred | 1974 | 1987 | 1971 | 1987 | 1976 | 1988 | 1975 | 1976 | 1998 | 1978 | 1980 | 1986 | 1974 |
| Heating Degree Days (F) | 1746. | 1368. | 1140. | 630. | 270. | 67. | 19. | 39. | 206. | 573. | 1065. | 1570. | 8693. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 44. | 125. | 212. | 152. | 25. | 0. | 0. | 0. | 560. |