| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.0 | 30.0 | 41.8 | 58.0 | 72.0 | 79.6 | 84.1 | 81.2 | 72.2 | 59.5 | 41.0 | 27.4 | 55.8 |
| Highest Mean Max. Temperature (F) | 36.6 | 42.6 | 52.5 | 69.2 | 80.9 | 87.0 | 90.9 | 85.6 | 80.3 | 65.0 | 52.8 | 35.4 | 90.9 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1998 | 1988 | 1988 | 1983 | 1998 | 2000 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.9 | 20.1 | 33.5 | 49.4 | 65.4 | 73.9 | 76.8 | 76.3 | 66.0 | 53.8 | 32.9 | 14.1 | 10.9 |
| Year Lowest Occurred | 1977 | 1989 | 1975 | 1975 | 1983 | 1982 | 1992 | 1985 | 1993 | 1972 | 1991 | 1983 | 1977 |
| Mean Temperature (F) | 11.7 | 18.8 | 31.1 | 45.9 | 59.1 | 67.3 | 72.1 | 70.0 | 60.7 | 48.6 | 32.4 | 17.9 | 44.6 |
| Highest Mean Temperature (F) | 25.8 | 32.2 | 40.1 | 54.5 | 67.3 | 73.4 | 77.2 | 75.1 | 66.7 | 54.9 | 40.7 | 26.2 | 77.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -1.0 | 7.7 | 22.0 | 39.0 | 53.3 | 62.7 | 64.8 | 65.6 | 55.2 | 43.1 | 25.2 | 3.8 | -1.0 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1996 | 1979 | 1982 | 1992 | 1992 | 1993 | 1988 | 1991 | 1983 | 1977 |
| Mean Min. Temperature (F) | 0.3 | 7.5 | 20.3 | 33.7 | 46.2 | 54.9 | 60.0 | 58.7 | 49.2 | 37.6 | 23.8 | 8.3 | 33.4 |
| Highest Mean Min. Temperature (F) | 14.9 | 23.7 | 31.0 | 39.9 | 54.0 | 60.6 | 65.1 | 64.5 | 53.6 | 45.1 | 29.3 | 19.2 | 65.1 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1983 | 1983 | 1994 | 1973 | 1987 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -13.0 | -4.8 | 9.9 | 24.9 | 40.5 | 51.1 | 52.7 | 53.6 | 43.2 | 30.9 | 14.4 | -6.6 | -13.0 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1996 | 1971 | 1993 | 1992 | 1992 | 1974 | 1988 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 0.82 | 0.65 | 1.54 | 2.54 | 3.37 | 4.48 | 4.04 | 4.69 | 3.58 | 2.45 | 1.69 | 0.76 | 30.61 |
| Highest Precipitation (in.) | 2.55 | 2.41 | 4.20 | 6.61 | 8.77 | 11.93 | 8.43 | 9.43 | 9.47 | 6.72 | 5.14 | 2.00 | 11.93 |
| Year Highest Occurred | 1975 | 1981 | 1977 | 1975 | 1991 | 1975 | 1991 | 1980 | 1991 | 1971 | 1975 | 1982 | 1975 |
| Lowest Precipitation (in.) | 0.13 | 0.00 | 0.14 | 0.08 | 0.96 | 1.29 | 1.35 | 1.76 | 1.32 | 0.45 | 0.24 | 0.15 | 0.00 |
| Year Lowest Occurred | 1981 | 1997 | 1987 | 1987 | 1976 | 1988 | 1976 | 1984 | 1998 | 1976 | 1976 | 1999 | 1997 |
| Heating Degree Days (F) | 1653. | 1295. | 1053. | 577. | 238. | 59. | 19. | 26. | 165. | 511. | 978. | 1462. | 8036. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 3. | 55. | 127. | 237. | 179. | 36. | 2. | 0. | 0. | 639. |