| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 25.3 | 30.4 | 35.4 | 42.5 | 53.0 | 64.3 | 70.7 | 68.5 | 59.9 | 47.6 | 33.5 | 25.0 | 46.3 |
| Highest Mean Max. Temperature (F) | 31.8 | 39.0 | 43.5 | 53.2 | 60.6 | 69.9 | 75.5 | 74.6 | 66.6 | 56.9 | 44.7 | 33.6 | 75.5 |
| Year Highest Occurred | 1986 | 1992 | 1972 | 1992 | 1994 | 1996 | 1998 | 1994 | 1995 | 1988 | 1999 | 1980 | 1998 |
| Lowest Mean Max. Temperature (F) | 16.0 | 25.4 | 28.8 | 33.7 | 45.5 | 58.4 | 64.8 | 62.9 | 53.0 | 37.8 | 26.3 | 18.5 | 16.0 |
| Year Lowest Occurred | 1979 | 1989 | 1980 | 1983 | 1995 | 1993 | 1983 | 1983 | 1985 | 1984 | 1994 | 1978 | 1979 |
| Mean Temperature (F) | 13.4 | 16.5 | 22.0 | 30.0 | 40.4 | 50.0 | 55.8 | 54.1 | 46.7 | 36.0 | 23.8 | 14.0 | 33.6 |
| Highest Mean Temperature (F) | 20.1 | 26.4 | 29.9 | 40.3 | 46.5 | 54.1 | 60.4 | 58.6 | 52.0 | 44.3 | 32.3 | 21.7 | 60.4 |
| Year Highest Occurred | 1999 | 1992 | 1986 | 1992 | 2000 | 1996 | 1998 | 1992 | 1995 | 1988 | 1995 | 1980 | 1998 |
| Lowest Mean Temperature (F) | 4.8 | 10.7 | 14.7 | 21.0 | 33.9 | 46.0 | 51.8 | 49.4 | 41.9 | 29.1 | 16.3 | 7.4 | 4.8 |
| Year Lowest Occurred | 1979 | 1974 | 1980 | 1983 | 1983 | 1975 | 1993 | 1989 | 1985 | 1984 | 1982 | 1990 | 1979 |
| Mean Min. Temperature (F) | 1.4 | 2.6 | 8.5 | 17.4 | 27.7 | 35.6 | 40.8 | 39.7 | 33.5 | 24.4 | 14.0 | 3.0 | 20.7 |
| Highest Mean Min. Temperature (F) | 10.4 | 13.8 | 17.8 | 27.4 | 34.2 | 39.2 | 45.2 | 44.0 | 38.9 | 31.7 | 22.2 | 11.7 | 45.2 |
| Year Highest Occurred | 1999 | 1992 | 1986 | 1992 | 1992 | 1997 | 1998 | 1992 | 1990 | 1988 | 1995 | 1996 | 1998 |
| Lowest Mean Min. Temperature (F) | -7.2 | -5.5 | 0.6 | 8.4 | 21.6 | 32.9 | 36.2 | 35.0 | 28.6 | 20.3 | 4.8 | -5.0 | -7.2 |
| Year Lowest Occurred | 1973 | 1974 | 1980 | 1983 | 1975 | 1976 | 1993 | 1976 | 1971 | 1984 | 1982 | 1990 | 1973 |
| Mean Precipitation (in.) | 2.78 | 2.69 | 2.75 | 2.20 | 1.92 | 1.16 | 1.16 | 1.61 | 1.74 | 1.91 | 2.23 | 2.32 | 24.47 |
| Highest Precipitation (in.) | 5.89 | 8.54 | 5.06 | 4.95 | 5.07 | 3.41 | 3.04 | 3.54 | 4.49 | 4.18 | 6.62 | 7.43 | 8.54 |
| Year Highest Occurred | 1996 | 1986 | 1982 | 1999 | 1995 | 1984 | 1985 | 1999 | 1982 | 1981 | 1985 | 1983 | 1986 |
| Lowest Precipitation (in.) | 0.72 | 0.72 | 0.77 | 0.33 | 0.06 | 0.10 | 0.00 | 0.03 | 0.10 | 0.15 | 0.38 | 0.30 | 0.00 |
| Year Lowest Occurred | 1992 | 1988 | 1997 | 1977 | 1989 | 1994 | 2000 | 1985 | 1974 | 1999 | 1999 | 1976 | 2000 |
| Heating Degree Days (F) | 1602. | 1358. | 1334. | 1052. | 765. | 451. | 286. | 338. | 549. | 899. | 1237. | 1581. | 11452. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 0. | 0. | 1. | 0. | 0. | 0. | 0. | 1. |