| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 41.1 | 47.4 | 57.5 | 68.5 | 77.8 | 86.2 | 89.7 | 87.5 | 81.0 | 70.5 | 56.7 | 45.7 | 67.5 |
| Highest Mean Max. Temperature (F) | 50.8 | 56.8 | 63.6 | 75.2 | 85.9 | 91.7 | 95.7 | 95.9 | 87.6 | 78.1 | 65.6 | 53.7 | 95.9 |
| Year Highest Occurred | 1990 | 1976 | 1977 | 1981 | 1987 | 1988 | 1980 | 1983 | 1998 | 1995 | 1999 | 1971 | 1983 |
| Lowest Mean Max. Temperature (F) | 29.1 | 33.0 | 50.0 | 60.3 | 72.6 | 81.3 | 85.5 | 82.7 | 73.7 | 65.3 | 49.6 | 33.4 | 29.1 |
| Year Lowest Occurred | 1977 | 1978 | 1978 | 1983 | 1990 | 1997 | 1971 | 1992 | 1974 | 1976 | 1976 | 2000 | 1977 |
| Mean Temperature (F) | 33.4 | 38.6 | 48.4 | 59.1 | 68.6 | 76.8 | 80.5 | 78.2 | 71.0 | 59.9 | 47.9 | 37.9 | 58.4 |
| Highest Mean Temperature (F) | 42.6 | 47.8 | 54.4 | 66.4 | 75.9 | 81.5 | 85.8 | 85.2 | 75.9 | 67.0 | 53.4 | 46.0 | 85.8 |
| Year Highest Occurred | 1990 | 1976 | 1973 | 1981 | 1987 | 1984 | 1980 | 1983 | 1998 | 1971 | 1999 | 1971 | 1980 |
| Lowest Mean Temperature (F) | 21.5 | 26.2 | 41.3 | 53.3 | 63.7 | 72.1 | 77.6 | 73.6 | 65.7 | 53.3 | 40.0 | 25.4 | 21.5 |
| Year Lowest Occurred | 1977 | 1978 | 1996 | 1997 | 1990 | 1992 | 1996 | 1992 | 1974 | 1988 | 1976 | 1989 | 1977 |
| Mean Min. Temperature (F) | 25.6 | 29.8 | 39.3 | 49.6 | 59.4 | 67.3 | 71.2 | 68.8 | 60.9 | 49.2 | 39.1 | 30.1 | 49.2 |
| Highest Mean Min. Temperature (F) | 34.3 | 38.8 | 46.5 | 57.5 | 68.3 | 71.7 | 75.8 | 74.4 | 66.4 | 57.5 | 44.2 | 39.2 | 75.8 |
| Year Highest Occurred | 1990 | 1976 | 1973 | 1981 | 1991 | 1991 | 1980 | 1983 | 1977 | 1971 | 1973 | 1982 | 1980 |
| Lowest Mean Min. Temperature (F) | 13.9 | 19.3 | 31.3 | 42.9 | 51.2 | 58.9 | 67.6 | 63.2 | 55.5 | 40.7 | 30.4 | 15.0 | 13.9 |
| Year Lowest Occurred | 1977 | 1978 | 1996 | 1997 | 1989 | 1988 | 1989 | 1994 | 1999 | 1988 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 3.21 | 3.55 | 4.39 | 4.74 | 4.76 | 4.15 | 4.38 | 3.63 | 3.04 | 3.43 | 4.40 | 4.16 | 47.84 |
| Highest Precipitation (in.) | 8.02 | 11.21 | 11.81 | 9.18 | 9.55 | 9.79 | 9.20 | 11.62 | 7.68 | 7.89 | 8.09 | 11.31 | 11.81 |
| Year Highest Occurred | 1982 | 1989 | 1997 | 1983 | 1986 | 1998 | 1972 | 1978 | 1992 | 1984 | 1983 | 1978 | 1997 |
| Lowest Precipitation (in.) | 0.83 | 0.67 | 1.39 | 1.25 | 0.86 | 0.50 | 0.39 | 0.17 | 0.41 | 0.89 | 1.02 | 0.69 | 0.17 |
| Year Lowest Occurred | 1981 | 1996 | 1971 | 1976 | 1994 | 1988 | 1983 | 1996 | 1999 | 1971 | 1999 | 1976 | 1996 |
| Heating Degree Days (F) | 982. | 740. | 519. | 215. | 67. | 3. | 0. | 1. | 26. | 207. | 513. | 840. | 4113. |
| Cooling Degree Days (F) | 0. | 0. | 3. | 37. | 179. | 356. | 478. | 408. | 205. | 49. | 1. | 0. | 1716. |