| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 27.0 | 33.4 | 44.6 | 59.0 | 71.3 | 79.1 | 82.6 | 80.2 | 72.3 | 60.9 | 44.3 | 30.9 | 57.1 |
| Highest Mean Max. Temperature (F) | 37.7 | 42.9 | 54.1 | 67.0 | 80.0 | 88.6 | 90.6 | 88.2 | 79.0 | 67.7 | 55.4 | 39.4 | 90.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 16.3 | 24.6 | 37.5 | 51.4 | 64.5 | 74.4 | 75.6 | 75.7 | 65.1 | 56.0 | 36.5 | 18.9 | 16.3 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1996 | 1993 | 1992 | 1992 | 1993 | 1988 | 1996 | 2000 | 1977 |
| Mean Temperature (F) | 17.2 | 23.3 | 34.2 | 47.0 | 58.5 | 67.2 | 71.3 | 69.0 | 60.9 | 49.7 | 35.5 | 22.2 | 46.3 |
| Highest Mean Temperature (F) | 28.2 | 35.7 | 42.1 | 53.5 | 65.7 | 71.7 | 75.1 | 74.6 | 65.6 | 56.9 | 43.2 | 30.4 | 75.1 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1982 | 1988 |
| Lowest Mean Temperature (F) | 4.5 | 12.6 | 26.3 | 40.3 | 52.3 | 62.3 | 66.1 | 63.9 | 56.0 | 43.6 | 28.3 | 10.0 | 4.5 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1995 | 2000 | 1977 |
| Mean Min. Temperature (F) | 7.4 | 13.2 | 23.8 | 35.0 | 45.7 | 55.2 | 60.0 | 57.7 | 49.4 | 38.5 | 26.7 | 13.5 | 35.5 |
| Highest Mean Min. Temperature (F) | 18.6 | 28.4 | 32.2 | 41.8 | 53.8 | 60.8 | 64.0 | 64.7 | 54.3 | 46.0 | 32.7 | 22.9 | 64.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1991 | 1991 | 1999 | 1995 | 1990 | 1971 | 1990 | 1982 | 1995 |
| Lowest Mean Min. Temperature (F) | -7.4 | -0.1 | 15.1 | 29.2 | 39.7 | 48.9 | 55.2 | 52.1 | 43.2 | 31.2 | 17.9 | -0.4 | -7.4 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1997 | 1982 | 1971 | 1992 | 1974 | 1988 | 1976 | 1985 | 1977 |
| Mean Precipitation (in.) | 1.21 | 1.15 | 2.04 | 3.54 | 3.41 | 3.93 | 4.44 | 4.19 | 3.53 | 2.13 | 2.40 | 1.38 | 33.35 |
| Highest Precipitation (in.) | 2.57 | 3.23 | 4.57 | 7.92 | 6.77 | 8.88 | 8.29 | 11.79 | 7.93 | 4.78 | 5.50 | 2.47 | 11.79 |
| Year Highest Occurred | 1988 | 1971 | 1973 | 1973 | 1973 | 1990 | 1999 | 1980 | 1986 | 1984 | 1985 | 1982 | 1980 |
| Lowest Precipitation (in.) | 0.04 | 0.05 | 0.19 | 1.33 | 0.40 | 0.93 | 1.39 | 1.57 | 0.13 | 0.44 | 0.10 | 0.11 | 0.04 |
| Year Lowest Occurred | 1981 | 1982 | 1978 | 1989 | 1981 | 1987 | 1990 | 1984 | 1979 | 1975 | 1976 | 1989 | 1981 |
| Heating Degree Days (F) | 1481. | 1168. | 954. | 544. | 243. | 47. | 13. | 37. | 157. | 476. | 886. | 1328. | 7334. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 42. | 112. | 208. | 159. | 32. | 1. | 0. | 0. | 556. |