| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.8 | 29.6 | 39.2 | 52.7 | 67.1 | 74.9 | 79.1 | 77.6 | 68.2 | 56.7 | 39.8 | 28.0 | 53.1 |
| Highest Mean Max. Temperature (F) | 34.0 | 40.8 | 48.0 | 63.1 | 77.1 | 80.5 | 86.4 | 82.6 | 74.0 | 63.7 | 49.3 | 35.7 | 86.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1995 | 1998 | 1973 | 1999 | 1994 | 1988 |
| Lowest Mean Max. Temperature (F) | 13.7 | 21.0 | 32.2 | 45.1 | 58.3 | 69.3 | 71.0 | 72.6 | 63.0 | 50.6 | 31.6 | 18.3 | 13.7 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1995 | 1997 | 1982 | 1992 | 1982 | 1993 | 1988 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 15.4 | 18.9 | 28.4 | 41.4 | 53.7 | 61.9 | 66.7 | 65.4 | 57.1 | 46.7 | 32.8 | 20.9 | 42.4 |
| Highest Mean Temperature (F) | 24.3 | 32.4 | 37.9 | 48.0 | 61.9 | 66.0 | 71.3 | 70.5 | 61.9 | 52.8 | 40.5 | 28.0 | 71.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1983 | 1995 | 1998 | 1973 | 1999 | 1994 | 1983 |
| Lowest Mean Temperature (F) | 5.5 | 8.4 | 20.5 | 34.4 | 46.7 | 56.1 | 60.1 | 60.6 | 51.2 | 41.6 | 26.1 | 11.5 | 5.5 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1989 | 1977 |
| Mean Min. Temperature (F) | 6.9 | 8.2 | 17.5 | 30.1 | 40.3 | 48.9 | 54.2 | 53.2 | 45.9 | 36.6 | 25.8 | 13.7 | 31.8 |
| Highest Mean Min. Temperature (F) | 15.2 | 23.9 | 27.8 | 34.7 | 46.7 | 53.2 | 59.1 | 58.3 | 49.8 | 41.8 | 31.7 | 21.4 | 59.1 |
| Year Highest Occurred | 1987 | 1998 | 2000 | 1977 | 1977 | 1995 | 1999 | 1995 | 1998 | 1973 | 1999 | 1982 | 1999 |
| Lowest Mean Min. Temperature (F) | -3.5 | -4.2 | 8.8 | 22.8 | 35.0 | 42.9 | 49.1 | 48.1 | 39.3 | 30.0 | 17.7 | 3.0 | -4.2 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1976 | 1976 | 1979 |
| Mean Precipitation (in.) | 3.02 | 1.47 | 2.04 | 2.08 | 3.00 | 3.08 | 3.46 | 3.34 | 3.09 | 3.13 | 2.79 | 3.06 | 33.56 |
| Highest Precipitation (in.) | 5.29 | 3.99 | 4.40 | 4.60 | 5.95 | 6.83 | 8.09 | 6.86 | 6.71 | 6.59 | 6.53 | 4.75 | 8.09 |
| Year Highest Occurred | 1999 | 1981 | 1979 | 1996 | 1973 | 1990 | 1987 | 1988 | 1980 | 1995 | 1991 | 1985 | 1987 |
| Lowest Precipitation (in.) | 1.52 | 0.27 | 0.23 | 0.48 | 0.77 | 0.76 | 1.11 | 0.70 | 0.79 | 0.98 | 0.97 | 0.46 | 0.23 |
| Year Lowest Occurred | 1990 | 1998 | 1999 | 1997 | 1986 | 1982 | 1989 | 1990 | 1989 | 2000 | 1984 | 1994 | 1999 |
| Heating Degree Days (F) | 1539. | 1292. | 1136. | 708. | 369. | 133. | 59. | 79. | 248. | 569. | 967. | 1370. | 8469. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 20. | 41. | 110. | 90. | 10. | 0. | 0. | 0. | 271. |