| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.8 | 25.8 | 36.4 | 49.7 | 64.9 | 73.3 | 78.0 | 75.5 | 65.8 | 54.2 | 37.1 | 24.6 | 50.4 |
| Highest Mean Max. Temperature (F) | 29.6 | 35.8 | 44.3 | 59.2 | 74.5 | 79.9 | 83.7 | 81.7 | 74.6 | 61.1 | 46.8 | 34.6 | 83.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1988 | 1976 | 1998 | 1973 | 1999 | 1994 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.2 | 18.6 | 28.6 | 42.4 | 55.9 | 67.7 | 70.6 | 69.5 | 59.5 | 47.8 | 30.0 | 15.3 | 10.2 |
| Year Lowest Occurred | 1977 | 1994 | 1984 | 1995 | 1997 | 1982 | 1992 | 1977 | 1974 | 1979 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 10.4 | 14.8 | 24.9 | 38.2 | 52.1 | 60.9 | 66.1 | 64.2 | 55.2 | 44.4 | 29.5 | 16.4 | 39.8 |
| Highest Mean Temperature (F) | 20.4 | 27.6 | 32.7 | 44.3 | 61.1 | 66.3 | 71.0 | 69.0 | 61.5 | 50.8 | 36.7 | 26.7 | 71.0 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 1973 | 1999 | 1994 | 1983 |
| Lowest Mean Temperature (F) | -0.1 | 6.2 | 16.6 | 30.8 | 44.8 | 55.0 | 59.2 | 59.2 | 49.0 | 39.3 | 21.3 | 6.4 | -0.1 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1988 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | 0.9 | 3.7 | 13.4 | 26.6 | 39.2 | 48.4 | 54.1 | 52.9 | 44.6 | 34.6 | 21.9 | 8.2 | 29.0 |
| Highest Mean Min. Temperature (F) | 11.2 | 19.4 | 24.2 | 32.8 | 47.6 | 52.6 | 59.3 | 58.2 | 49.0 | 41.5 | 27.4 | 18.7 | 59.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1977 | 1995 | 1983 | 1983 | 1978 | 1971 | 1998 | 1994 | 1983 |
| Lowest Mean Min. Temperature (F) | -10.4 | -6.7 | 2.8 | 19.1 | 33.5 | 42.1 | 47.7 | 47.6 | 38.5 | 29.1 | 12.6 | -2.8 | -10.4 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1971 | 1986 | 1992 | 1992 | 1974 | 1976 | 1995 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.81 | 1.28 | 2.17 | 2.14 | 3.34 | 3.49 | 3.93 | 3.90 | 3.66 | 3.11 | 2.73 | 1.82 | 33.38 |
| Highest Precipitation (in.) | 3.62 | 3.17 | 4.91 | 4.77 | 7.21 | 6.07 | 8.03 | 8.44 | 6.81 | 6.21 | 6.03 | 3.12 | 8.44 |
| Year Highest Occurred | 1997 | 1971 | 1979 | 1985 | 1983 | 1979 | 1999 | 1978 | 1985 | 1979 | 1985 | 1982 | 1978 |
| Lowest Precipitation (in.) | 0.76 | 0.31 | 0.43 | 0.59 | 0.30 | 0.93 | 1.14 | 0.47 | 0.65 | 1.34 | 0.75 | 0.43 | 0.30 |
| Year Lowest Occurred | 1984 | 1994 | 1993 | 1988 | 1986 | 1988 | 1989 | 1976 | 1989 | 1978 | 1984 | 1994 | 1986 |
| Heating Degree Days (F) | 1694. | 1407. | 1244. | 805. | 424. | 160. | 72. | 103. | 302. | 639. | 1066. | 1508. | 9424. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 22. | 36. | 104. | 78. | 8. | 0. | 0. | 0. | 248. |