| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.8 | 27.6 | 40.3 | 56.5 | 69.5 | 79.7 | 82.9 | 80.4 | 72.2 | 60.0 | 40.1 | 25.4 | 54.6 |
| Highest Mean Max. Temperature (F) | 34.6 | 41.9 | 49.9 | 67.7 | 78.4 | 88.2 | 88.5 | 88.9 | 79.3 | 67.1 | 52.1 | 35.5 | 88.9 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1975 | 1999 | 1998 | 1983 |
| Lowest Mean Max. Temperature (F) | 7.6 | 17.3 | 30.9 | 46.0 | 62.0 | 74.2 | 73.8 | 75.2 | 63.6 | 55.7 | 30.5 | 11.1 | 7.6 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1996 | 1993 | 1992 | 1992 | 1993 | 1972 | 1991 | 1983 | 1979 |
| Mean Temperature (F) | 11.4 | 18.3 | 31.0 | 45.6 | 58.3 | 68.4 | 72.1 | 69.8 | 60.9 | 48.9 | 31.5 | 17.0 | 44.4 |
| Highest Mean Temperature (F) | 25.1 | 30.3 | 39.4 | 53.7 | 66.7 | 74.1 | 77.5 | 76.2 | 66.5 | 54.1 | 41.6 | 26.0 | 77.5 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1983 | 1983 | 1978 | 1971 | 1999 | 1998 | 1983 |
| Lowest Mean Temperature (F) | -1.6 | 6.7 | 21.2 | 38.0 | 51.5 | 62.8 | 64.9 | 65.2 | 54.9 | 44.2 | 23.8 | 2.1 | -1.6 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1976 | 1985 | 1983 | 1977 |
| Mean Min. Temperature (F) | 1.9 | 8.9 | 21.7 | 34.6 | 47.1 | 57.0 | 61.3 | 59.2 | 49.5 | 37.7 | 22.9 | 8.5 | 34.2 |
| Highest Mean Min. Temperature (F) | 15.6 | 23.3 | 31.6 | 41.8 | 55.0 | 63.5 | 66.4 | 66.1 | 54.5 | 44.0 | 31.1 | 19.8 | 66.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1983 | 1995 | 1994 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -12.2 | -5.1 | 11.5 | 29.1 | 40.4 | 50.9 | 55.9 | 54.8 | 42.8 | 31.5 | 14.7 | -7.0 | -12.2 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1996 | 1997 | 1982 | 1992 | 1986 | 1974 | 1988 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.01 | 0.59 | 1.91 | 2.94 | 3.93 | 4.05 | 4.58 | 4.43 | 3.12 | 2.27 | 1.82 | 0.99 | 31.64 |
| Highest Precipitation (in.) | 5.37 | 2.30 | 4.17 | 6.43 | 7.10 | 9.08 | 11.97 | 10.21 | 8.25 | 4.99 | 4.89 | 3.10 | 11.97 |
| Year Highest Occurred | 1999 | 1981 | 1990 | 1999 | 1993 | 2000 | 1991 | 1997 | 1986 | 1984 | 1991 | 1982 | 1991 |
| Lowest Precipitation (in.) | 0.05 | 0.00 | 0.12 | 0.47 | 1.06 | 0.85 | 0.42 | 0.90 | 0.57 | 0.32 | 0.11 | 0.17 | 0.00 |
| Year Lowest Occurred | 1981 | 1996 | 1994 | 1987 | 1994 | 1988 | 1975 | 1971 | 1990 | 1978 | 1976 | 1997 | 1996 |
| Heating Degree Days (F) | 1664. | 1309. | 1054. | 587. | 262. | 44. | 17. | 31. | 164. | 501. | 1005. | 1490. | 8128. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 3. | 53. | 144. | 238. | 180. | 40. | 1. | 0. | 0. | 659. |