| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 22.9 | 27.4 | 35.4 | 46.4 | 55.9 | 62.9 | 69.8 | 71.0 | 63.0 | 52.0 | 38.3 | 27.3 | 47.7 |
| Highest Mean Max. Temperature (F) | 31.3 | 37.5 | 41.4 | 53.6 | 60.2 | 68.7 | 75.7 | 76.6 | 70.2 | 56.7 | 45.2 | 35.0 | 76.6 |
| Year Highest Occurred | 1990 | 1998 | 1985 | 1987 | 1998 | 1971 | 1988 | 1983 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Max. Temperature (F) | 14.3 | 16.2 | 29.7 | 41.8 | 50.7 | 57.8 | 63.0 | 65.6 | 57.6 | 48.2 | 32.5 | 17.6 | 14.3 |
| Year Lowest Occurred | 1979 | 1979 | 1989 | 1975 | 1979 | 1989 | 1992 | 1977 | 1993 | 1981 | 1995 | 1983 | 1979 |
| Mean Temperature (F) | 13.9 | 18.5 | 27.5 | 38.4 | 47.1 | 53.3 | 60.6 | 62.6 | 55.1 | 44.6 | 31.8 | 19.4 | 39.4 |
| Highest Mean Temperature (F) | 22.2 | 30.6 | 33.7 | 43.4 | 50.5 | 57.8 | 66.0 | 67.2 | 60.8 | 50.1 | 37.8 | 28.6 | 67.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1980 | 1972 | 1971 | 1988 | 1998 | 1998 | 1971 | 1999 | 1997 | 1998 |
| Lowest Mean Temperature (F) | 4.9 | 6.7 | 21.7 | 34.5 | 43.3 | 50.1 | 55.4 | 56.9 | 49.8 | 40.5 | 24.9 | 9.0 | 4.9 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1996 | 1997 | 1989 | 1992 | 1977 | 1993 | 1993 | 1995 | 1983 | 1982 |
| Mean Min. Temperature (F) | 4.9 | 9.6 | 19.6 | 30.3 | 38.2 | 43.7 | 51.3 | 54.2 | 47.2 | 37.1 | 25.2 | 11.5 | 31.1 |
| Highest Mean Min. Temperature (F) | 14.5 | 23.6 | 27.6 | 34.3 | 40.9 | 48.7 | 57.6 | 58.9 | 51.3 | 43.4 | 30.6 | 22.2 | 58.9 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1972 | 1998 | 1987 | 1998 | 1998 | 1971 | 1981 | 1997 | 1998 |
| Lowest Mean Min. Temperature (F) | -6.7 | -2.8 | 12.8 | 26.6 | 35.0 | 41.8 | 47.4 | 48.1 | 41.6 | 32.5 | 17.2 | -0.3 | -6.7 |
| Year Lowest Occurred | 1972 | 1979 | 1996 | 1982 | 1996 | 1983 | 1996 | 1977 | 1974 | 1993 | 1995 | 1976 | 1972 |
| Mean Precipitation (in.) | 0.72 | 0.56 | 1.12 | 1.30 | 2.50 | 3.41 | 3.38 | 3.13 | 3.36 | 2.59 | 1.76 | 0.79 | 24.62 |
| Highest Precipitation (in.) | 2.60 | 1.83 | 4.43 | 3.43 | 4.78 | 7.14 | 8.30 | 7.82 | 7.47 | 7.62 | 4.23 | 1.94 | 8.30 |
| Year Highest Occurred | 1975 | 1971 | 1979 | 1981 | 1974 | 1996 | 1993 | 1988 | 1977 | 1998 | 1982 | 1984 | 1993 |
| Lowest Precipitation (in.) | 0.01 | 0.02 | 0.12 | 0.07 | 0.35 | 0.05 | 0.88 | 0.67 | 0.93 | 0.70 | 0.13 | 0.19 | 0.01 |
| Year Lowest Occurred | 1981 | 1993 | 1993 | 1987 | 1976 | 1995 | 1989 | 1981 | 1976 | 1986 | 1976 | 1997 | 1981 |
| Heating Degree Days (F) | 1584. | 1302. | 1162. | 801. | 557. | 350. | 170. | 128. | 303. | 634. | 999. | 1413. | 9403. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 1. | 31. | 54. | 6. | 0. | 0. | 0. | 92. |