| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 27.0 | 31.7 | 39.2 | 47.4 | 58.7 | 69.2 | 74.3 | 72.8 | 66.1 | 54.9 | 38.9 | 29.2 | 50.8 |
| Highest Mean Max. Temperature (F) | 35.4 | 37.6 | 46.8 | 55.7 | 64.5 | 75.1 | 78.5 | 76.4 | 72.5 | 59.8 | 49.2 | 38.8 | 78.5 |
| Year Highest Occurred | 1981 | 1995 | 1999 | 1992 | 2000 | 1977 | 2000 | 1995 | 1998 | 1992 | 1999 | 1980 | 2000 |
| Lowest Mean Max. Temperature (F) | 16.7 | 26.3 | 34.4 | 38.9 | 51.9 | 64.6 | 69.8 | 71.0 | 61.0 | 45.5 | 30.9 | 21.7 | 16.7 |
| Year Lowest Occurred | 1979 | 1985 | 1977 | 1983 | 1983 | 1984 | 1973 | 1997 | 1985 | 1984 | 1992 | 1978 | 1979 |
| Mean Temperature (F) | 14.0 | 17.1 | 25.4 | 33.8 | 44.2 | 52.8 | 58.1 | 56.9 | 50.2 | 40.0 | 27.4 | 17.5 | 36.5 |
| Highest Mean Temperature (F) | 21.0 | 23.7 | 30.9 | 39.7 | 48.6 | 57.2 | 61.4 | 59.9 | 55.3 | 43.2 | 32.2 | 27.2 | 61.4 |
| Year Highest Occurred | 1981 | 1995 | 1999 | 1992 | 2000 | 1977 | 1998 | 2000 | 1998 | 1988 | 1999 | 1980 | 1998 |
| Lowest Mean Temperature (F) | 6.1 | 10.4 | 20.3 | 26.2 | 38.8 | 49.5 | 55.2 | 54.2 | 46.0 | 35.8 | 20.3 | 11.5 | 6.1 |
| Year Lowest Occurred | 1979 | 1974 | 1977 | 1983 | 1983 | 1975 | 1993 | 1974 | 1971 | 1984 | 2000 | 1978 | 1979 |
| Mean Min. Temperature (F) | 0.9 | 2.5 | 11.5 | 20.2 | 29.7 | 36.3 | 41.9 | 41.0 | 34.2 | 25.1 | 15.8 | 5.8 | 22.1 |
| Highest Mean Min. Temperature (F) | 10.0 | 12.7 | 16.5 | 24.3 | 32.7 | 41.1 | 45.7 | 45.5 | 38.5 | 29.2 | 20.6 | 15.5 | 45.7 |
| Year Highest Occurred | 1971 | 1986 | 1972 | 1989 | 2000 | 1988 | 1998 | 1983 | 1997 | 1972 | 1998 | 1980 | 1998 |
| Lowest Mean Min. Temperature (F) | -5.8 | -7.2 | 5.0 | 13.4 | 25.7 | 33.9 | 37.4 | 37.3 | 30.0 | 21.3 | 8.8 | -1.6 | -7.2 |
| Year Lowest Occurred | 1984 | 1974 | 1988 | 1983 | 1983 | 1982 | 1993 | 1974 | 1971 | 1999 | 2000 | 1991 | 1974 |
| Mean Precipitation (in.) | 1.01 | 0.83 | 0.91 | 1.30 | 1.56 | 1.20 | 1.67 | 1.57 | 1.19 | 1.03 | 0.91 | 0.80 | 13.98 |
| Highest Precipitation (in.) | 2.43 | 2.21 | 2.51 | 2.58 | 3.88 | 3.31 | 3.87 | 3.03 | 2.94 | 2.71 | 2.75 | 3.13 | 3.88 |
| Year Highest Occurred | 1980 | 1986 | 1983 | 1986 | 1995 | 1984 | 1998 | 1983 | 1993 | 1998 | 1985 | 1983 | 1995 |
| Lowest Precipitation (in.) | 0.20 | 0.23 | 0.27 | 0.40 | 0.30 | 0.00 | 0.43 | 0.26 | 0.18 | 0.05 | 0.37 | 0.07 | 0.00 |
| Year Lowest Occurred | 1981 | 1982 | 1998 | 1979 | 1974 | 1986 | 1978 | 1985 | 1979 | 2000 | 1999 | 1997 | 1986 |
| Heating Degree Days (F) | 1582. | 1341. | 1229. | 937. | 645. | 367. | 217. | 251. | 446. | 774. | 1129. | 1472. | 10390. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 1. | 0. | 0. | 0. | 0. | 0. | 1. |