| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.5 | 27.7 | 39.0 | 54.8 | 67.7 | 76.6 | 80.0 | 77.2 | 69.2 | 57.7 | 40.2 | 26.2 | 53.2 |
| Highest Mean Max. Temperature (F) | 34.1 | 37.8 | 49.3 | 62.6 | 77.9 | 84.8 | 85.1 | 82.6 | 78.3 | 64.4 | 51.7 | 36.1 | 85.1 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.2 | 18.6 | 31.1 | 45.8 | 59.4 | 71.9 | 74.0 | 72.8 | 61.9 | 52.2 | 31.9 | 15.0 | 10.2 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1983 | 1982 | 1992 | 1986 | 1993 | 1988 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 12.3 | 18.2 | 30.0 | 44.1 | 56.5 | 65.7 | 69.6 | 67.3 | 59.0 | 47.8 | 32.2 | 18.3 | 43.4 |
| Highest Mean Temperature (F) | 25.2 | 30.6 | 38.4 | 50.6 | 64.8 | 70.6 | 73.5 | 72.8 | 66.5 | 55.5 | 40.8 | 26.1 | 73.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1983 | 1995 | 1998 | 1971 | 1999 | 1982 | 1983 |
| Lowest Mean Temperature (F) | -0.3 | 7.8 | 22.9 | 37.2 | 49.9 | 59.9 | 64.5 | 63.0 | 53.2 | 41.9 | 24.3 | 6.8 | -0.3 |
| Year Lowest Occurred | 1977 | 1978 | 1984 | 1975 | 1997 | 1982 | 1992 | 1986 | 1993 | 1987 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | 3.0 | 8.7 | 21.0 | 33.3 | 45.2 | 54.8 | 59.2 | 57.3 | 48.7 | 37.8 | 24.1 | 10.3 | 33.6 |
| Highest Mean Min. Temperature (F) | 16.2 | 23.9 | 30.4 | 38.6 | 51.8 | 58.7 | 63.1 | 65.2 | 54.7 | 46.5 | 30.7 | 19.8 | 65.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1998 | 1995 | 1983 | 1995 | 1998 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -10.9 | -5.1 | 13.5 | 28.5 | 39.0 | 47.8 | 55.0 | 53.1 | 41.8 | 31.1 | 14.8 | -3.2 | -10.9 |
| Year Lowest Occurred | 1977 | 1978 | 1978 | 1975 | 1997 | 1982 | 1992 | 1992 | 1974 | 1987 | 1976 | 2000 | 1977 |
| Mean Precipitation (in.) | 0.95 | 0.90 | 2.00 | 2.97 | 3.41 | 3.81 | 4.17 | 4.29 | 3.62 | 2.28 | 2.17 | 1.05 | 31.62 |
| Highest Precipitation (in.) | 2.61 | 2.61 | 4.54 | 5.94 | 7.26 | 8.08 | 10.66 | 9.16 | 10.78 | 4.91 | 5.41 | 2.20 | 10.78 |
| Year Highest Occurred | 1996 | 1981 | 1973 | 1999 | 1989 | 1990 | 1999 | 1980 | 1986 | 1984 | 1982 | 1992 | 1986 |
| Lowest Precipitation (in.) | 0.08 | 0.13 | 0.22 | 0.54 | 0.68 | 1.16 | 0.83 | 0.79 | 0.42 | 0.41 | 0.08 | 0.30 | 0.08 |
| Year Lowest Occurred | 1981 | 1982 | 1978 | 1989 | 1981 | 1988 | 1975 | 1976 | 1976 | 1975 | 1976 | 1986 | 1981 |
| Heating Degree Days (F) | 1635. | 1311. | 1086. | 629. | 301. | 71. | 20. | 50. | 208. | 535. | 986. | 1450. | 8282. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 36. | 92. | 164. | 120. | 27. | 1. | 0. | 0. | 441. |