| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.9 | 30.5 | 42.0 | 56.4 | 69.1 | 78.5 | 82.2 | 79.7 | 71.5 | 59.8 | 43.4 | 30.0 | 55.7 |
| Highest Mean Max. Temperature (F) | 37.3 | 39.4 | 51.8 | 64.5 | 77.7 | 85.5 | 87.7 | 86.0 | 77.9 | 67.1 | 54.2 | 39.0 | 87.7 |
| Year Highest Occurred | 1990 | 1984 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 13.9 | 20.7 | 34.8 | 48.9 | 61.3 | 73.7 | 76.1 | 74.6 | 65.0 | 54.5 | 34.8 | 18.9 | 13.9 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1983 | 1993 | 1992 | 1997 | 1993 | 1988 | 1985 | 1985 | 1977 |
| Mean Temperature (F) | 15.2 | 20.6 | 32.0 | 45.2 | 57.1 | 66.6 | 70.6 | 68.2 | 59.3 | 48.1 | 34.3 | 21.5 | 44.9 |
| Highest Mean Temperature (F) | 27.9 | 33.0 | 41.2 | 52.8 | 63.1 | 72.1 | 75.8 | 75.3 | 65.0 | 54.6 | 43.2 | 29.7 | 75.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1985 | 1998 | 1987 | 1987 | 1995 | 1998 | 1971 | 1999 | 1998 | 1987 |
| Lowest Mean Temperature (F) | 2.4 | 8.6 | 23.9 | 38.1 | 50.2 | 60.4 | 66.2 | 64.4 | 53.6 | 42.6 | 26.5 | 8.8 | 2.4 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1983 | 1982 | 1992 | 1977 | 1974 | 1988 | 1976 | 1985 | 1977 |
| Mean Min. Temperature (F) | 5.5 | 10.6 | 22.0 | 34.0 | 45.0 | 54.6 | 59.0 | 56.6 | 47.1 | 36.3 | 25.2 | 12.9 | 34.1 |
| Highest Mean Min. Temperature (F) | 18.4 | 26.7 | 30.6 | 41.4 | 52.9 | 60.7 | 65.9 | 66.4 | 54.1 | 42.0 | 32.2 | 23.0 | 66.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1985 | 1991 | 1987 | 1999 | 1995 | 1994 | 1971 | 1999 | 1987 | 1995 |
| Lowest Mean Min. Temperature (F) | -9.2 | -3.5 | 12.4 | 27.2 | 36.9 | 45.9 | 52.3 | 49.6 | 38.7 | 29.0 | 14.1 | -1.9 | -9.2 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1971 | 1982 | 1971 | 1976 | 1976 | 1976 | 1976 | 1976 | 1977 |
| Mean Precipitation (in.) | 1.26 | 1.22 | 2.25 | 3.50 | 3.55 | 4.17 | 4.45 | 4.33 | 3.54 | 2.40 | 2.45 | 1.41 | 34.53 |
| Highest Precipitation (in.) | 3.21 | 3.74 | 5.87 | 7.88 | 7.99 | 8.71 | 13.43 | 16.09 | 10.05 | 6.30 | 6.07 | 2.80 | 16.09 |
| Year Highest Occurred | 1999 | 1971 | 1998 | 1999 | 2000 | 1996 | 1993 | 1980 | 1986 | 1984 | 1985 | 1992 | 1980 |
| Lowest Precipitation (in.) | 0.08 | 0.04 | 0.23 | 0.38 | 0.58 | 0.83 | 1.56 | 1.22 | 0.62 | 0.30 | 0.04 | 0.26 | 0.04 |
| Year Lowest Occurred | 1981 | 1987 | 1978 | 1989 | 1981 | 1988 | 1998 | 1996 | 1979 | 1975 | 1976 | 1976 | 1987 |
| Heating Degree Days (F) | 1545. | 1245. | 1022. | 595. | 283. | 67. | 17. | 54. | 200. | 527. | 922. | 1350. | 7827. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 35. | 113. | 191. | 152. | 29. | 1. | 0. | 0. | 522. |