| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.1 | 29.4 | 40.2 | 54.4 | 68.3 | 77.1 | 81.4 | 78.7 | 70.2 | 57.5 | 41.9 | 28.9 | 54.3 |
| Highest Mean Max. Temperature (F) | 35.3 | 39.2 | 50.5 | 61.9 | 77.0 | 84.6 | 87.7 | 85.0 | 75.6 | 63.5 | 51.1 | 36.5 | 87.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1988 | 1988 | 1988 | 1988 | 1998 | 1973 | 1999 | 1982 | 1988 |
| Lowest Mean Max. Temperature (F) | 13.4 | 20.8 | 32.9 | 47.7 | 59.9 | 72.0 | 76.1 | 73.8 | 63.5 | 52.6 | 34.0 | 18.5 | 13.4 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1993 | 1992 | 1997 | 1993 | 1988 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 16.0 | 21.1 | 31.5 | 44.5 | 57.4 | 66.7 | 71.6 | 69.4 | 60.7 | 48.6 | 34.6 | 21.7 | 45.3 |
| Highest Mean Temperature (F) | 26.9 | 31.3 | 39.4 | 50.4 | 65.1 | 71.3 | 76.2 | 75.3 | 64.7 | 56.0 | 41.2 | 30.2 | 76.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1987 | 1988 | 1988 | 1998 | 1971 | 1975 | 1982 | 1988 |
| Lowest Mean Temperature (F) | 4.6 | 11.4 | 24.7 | 39.1 | 49.6 | 61.5 | 66.8 | 64.8 | 54.4 | 44.2 | 26.1 | 10.2 | 4.6 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1997 | 1993 | 1988 | 1995 | 1985 | 1977 |
| Mean Min. Temperature (F) | 7.8 | 12.7 | 22.8 | 34.6 | 46.5 | 56.2 | 61.7 | 60.0 | 51.2 | 39.7 | 27.3 | 14.4 | 36.2 |
| Highest Mean Min. Temperature (F) | 18.5 | 25.0 | 31.3 | 40.1 | 53.3 | 60.4 | 67.0 | 65.6 | 55.1 | 48.5 | 32.5 | 23.8 | 67.0 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1991 | 1991 | 1983 | 1988 | 1978 | 1971 | 1975 | 1982 | 1983 |
| Lowest Mean Min. Temperature (F) | -4.3 | 1.9 | 15.2 | 29.3 | 39.2 | 50.7 | 57.2 | 55.6 | 45.2 | 35.5 | 18.2 | 1.6 | -4.3 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1996 | 1997 | 1982 | 1996 | 1992 | 1993 | 1993 | 1995 | 1985 | 1977 |
| Mean Precipitation (in.) | 1.19 | 1.04 | 2.05 | 2.84 | 3.10 | 3.56 | 3.31 | 3.90 | 3.23 | 2.29 | 2.27 | 1.38 | 30.16 |
| Highest Precipitation (in.) | 2.57 | 3.66 | 4.70 | 5.54 | 7.83 | 9.07 | 8.21 | 10.30 | 9.15 | 5.30 | 5.87 | 3.14 | 10.30 |
| Year Highest Occurred | 1982 | 1981 | 1979 | 1981 | 1973 | 1990 | 1994 | 1995 | 1986 | 1984 | 1985 | 1982 | 1995 |
| Lowest Precipitation (in.) | 0.04 | 0.19 | 0.14 | 0.47 | 0.22 | 0.64 | 0.60 | 0.50 | 0.45 | 0.44 | 0.04 | 0.15 | 0.04 |
| Year Lowest Occurred | 1981 | 1978 | 1978 | 1997 | 1988 | 1976 | 1998 | 1976 | 1976 | 1975 | 1976 | 1994 | 1981 |
| Heating Degree Days (F) | 1520. | 1230. | 1039. | 617. | 281. | 62. | 15. | 30. | 161. | 509. | 913. | 1344. | 7721. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 45. | 111. | 217. | 164. | 32. | 2. | 0. | 0. | 572. |