| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.3 | 27.2 | 39.2 | 55.3 | 70.0 | 79.5 | 83.4 | 80.3 | 71.5 | 58.8 | 39.4 | 25.1 | 54.2 |
| Highest Mean Max. Temperature (F) | 36.3 | 40.6 | 50.3 | 65.4 | 78.4 | 89.0 | 89.7 | 86.5 | 78.9 | 65.0 | 51.5 | 34.9 | 89.7 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1977 | 1988 | 1974 | 1983 | 1998 | 1973 | 1999 | 1999 | 1974 |
| Lowest Mean Max. Temperature (F) | 7.7 | 15.5 | 30.3 | 42.5 | 63.2 | 73.4 | 74.2 | 75.2 | 65.1 | 52.8 | 29.4 | 7.2 | 7.2 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1996 | 1993 | 1992 | 1985 | 1993 | 1988 | 1996 | 1983 | 1983 |
| Mean Temperature (F) | 10.7 | 17.7 | 30.0 | 44.4 | 58.7 | 68.3 | 72.5 | 69.5 | 59.7 | 47.4 | 30.8 | 16.5 | 43.9 |
| Highest Mean Temperature (F) | 26.9 | 30.0 | 39.3 | 52.5 | 65.6 | 74.9 | 77.5 | 76.1 | 65.8 | 53.1 | 41.0 | 26.5 | 77.5 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1998 | 1988 | 1983 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -2.7 | 4.3 | 20.7 | 35.7 | 52.7 | 63.0 | 65.3 | 65.2 | 54.4 | 41.7 | 22.1 | -0.8 | -2.7 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1976 | 1996 | 1983 | 1977 |
| Mean Min. Temperature (F) | 1.1 | 8.1 | 20.8 | 33.5 | 47.4 | 57.0 | 61.5 | 58.7 | 47.9 | 35.9 | 22.2 | 7.8 | 33.5 |
| Highest Mean Min. Temperature (F) | 17.5 | 22.1 | 31.3 | 39.8 | 53.3 | 62.0 | 67.5 | 65.6 | 53.3 | 41.2 | 30.5 | 20.6 | 67.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1998 | 1991 | 1983 | 1983 | 1994 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -13.2 | -6.9 | 11.0 | 28.5 | 40.9 | 51.1 | 56.3 | 53.5 | 43.2 | 28.9 | 13.2 | -8.9 | -13.2 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1979 | 1979 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.66 | 0.60 | 1.58 | 2.48 | 3.44 | 4.71 | 3.62 | 4.41 | 2.93 | 2.05 | 1.71 | 0.69 | 28.88 |
| Highest Precipitation (in.) | 1.95 | 1.77 | 4.89 | 7.20 | 7.97 | 10.85 | 7.42 | 13.60 | 6.57 | 7.29 | 4.56 | 3.30 | 13.60 |
| Year Highest Occurred | 1975 | 1981 | 1985 | 1975 | 1993 | 1993 | 1997 | 1981 | 1986 | 1971 | 1975 | 1982 | 1981 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.00 | 0.10 | 0.83 | 0.96 | 0.49 | 1.57 | 0.30 | 0.00 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 2000 | 2000 | 1999 | 1987 | 1976 | 1982 | 1975 | 1972 | 2000 | 1993 | 1997 | 2000 | 2000 |
| Heating Degree Days (F) | 1683. | 1326. | 1084. | 621. | 242. | 45. | 18. | 32. | 188. | 549. | 1026. | 1505. | 8319. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 46. | 142. | 249. | 173. | 28. | 0. | 0. | 0. | 640. |