| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.4 | 29.5 | 40.2 | 54.1 | 68.0 | 77.4 | 81.8 | 79.1 | 70.9 | 58.4 | 42.6 | 29.4 | 54.7 |
| Highest Mean Max. Temperature (F) | 35.5 | 37.2 | 49.8 | 61.7 | 77.9 | 82.8 | 86.0 | 83.8 | 76.8 | 65.0 | 53.1 | 38.3 | 86.0 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1976 | 1988 | 1998 | 1971 | 1999 | 1998 | 1976 |
| Lowest Mean Max. Temperature (F) | 13.4 | 20.2 | 33.8 | 47.2 | 59.7 | 72.7 | 75.4 | 73.8 | 64.5 | 52.9 | 34.2 | 19.0 | 13.4 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1993 | 1992 | 1997 | 1993 | 1987 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 16.1 | 20.9 | 31.5 | 44.6 | 57.8 | 67.4 | 72.0 | 69.5 | 60.9 | 49.2 | 35.1 | 22.1 | 45.6 |
| Highest Mean Temperature (F) | 27.4 | 31.4 | 40.3 | 50.0 | 65.4 | 72.0 | 75.3 | 74.0 | 65.5 | 56.7 | 43.2 | 29.6 | 75.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1995 | 1983 | 1995 | 1998 | 1971 | 1999 | 1998 | 1983 |
| Lowest Mean Temperature (F) | 3.9 | 10.6 | 25.2 | 38.4 | 50.6 | 62.9 | 66.3 | 65.6 | 55.7 | 43.7 | 27.5 | 10.8 | 3.9 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1997 | 1993 | 1987 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | 7.8 | 12.3 | 22.8 | 35.0 | 47.5 | 57.3 | 62.1 | 59.8 | 50.9 | 40.0 | 27.6 | 14.8 | 36.5 |
| Highest Mean Min. Temperature (F) | 19.3 | 25.5 | 30.7 | 40.0 | 54.0 | 62.2 | 66.0 | 66.2 | 55.3 | 48.5 | 33.2 | 23.4 | 66.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1986 | 1982 | 1995 | 1999 | 1995 | 1994 | 1971 | 1999 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -5.6 | 1.1 | 15.5 | 29.7 | 41.4 | 51.0 | 57.1 | 55.0 | 45.1 | 34.2 | 18.3 | 1.8 | -5.6 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1985 | 1992 | 1985 | 1974 | 1976 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.35 | 1.09 | 2.18 | 2.87 | 2.96 | 3.66 | 3.58 | 4.15 | 3.47 | 2.20 | 2.51 | 1.55 | 31.57 |
| Highest Precipitation (in.) | 3.12 | 3.16 | 5.94 | 6.06 | 7.35 | 10.60 | 8.40 | 10.86 | 11.51 | 5.79 | 6.28 | 4.57 | 11.51 |
| Year Highest Occurred | 1982 | 1981 | 1979 | 1981 | 1973 | 1993 | 1986 | 1995 | 1986 | 1995 | 1985 | 1982 | 1986 |
| Lowest Precipitation (in.) | 0.10 | 0.26 | 0.10 | 0.36 | 0.38 | 0.66 | 1.10 | 1.00 | 0.57 | 0.26 | 0.06 | 0.25 | 0.06 |
| Year Lowest Occurred | 1981 | 1987 | 1999 | 1997 | 1981 | 1988 | 1998 | 1976 | 1976 | 1975 | 1976 | 1993 | 1976 |
| Heating Degree Days (F) | 1515. | 1235. | 1040. | 614. | 272. | 52. | 9. | 26. | 156. | 492. | 897. | 1331. | 7639. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 47. | 122. | 224. | 164. | 31. | 2. | 0. | 0. | 591. |