| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.6 | 27.9 | 38.6 | 53.9 | 68.9 | 76.3 | 80.3 | 78.0 | 68.7 | 56.3 | 37.3 | 24.5 | 52.6 |
| Highest Mean Max. Temperature (F) | 32.9 | 39.0 | 48.8 | 64.4 | 79.0 | 82.9 | 87.5 | 83.0 | 76.5 | 62.1 | 47.1 | 33.2 | 87.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 2000 | 1999 | 1994 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.3 | 19.1 | 30.7 | 45.3 | 59.4 | 70.1 | 73.0 | 73.0 | 61.5 | 50.7 | 29.0 | 13.8 | 10.3 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1995 | 1997 | 1993 | 1992 | 1992 | 1993 | 1980 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 10.4 | 17.1 | 27.7 | 41.4 | 54.8 | 63.3 | 68.2 | 66.5 | 57.6 | 46.0 | 30.1 | 16.1 | 41.6 |
| Highest Mean Temperature (F) | 22.4 | 31.2 | 36.8 | 48.2 | 63.6 | 67.6 | 72.5 | 71.0 | 64.0 | 52.2 | 38.3 | 25.2 | 72.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -0.5 | 7.1 | 19.3 | 35.2 | 47.2 | 58.6 | 61.5 | 62.1 | 51.5 | 41.0 | 21.3 | 4.3 | -0.5 |
| Year Lowest Occurred | 1977 | 1972 | 1972 | 1996 | 1997 | 1982 | 1992 | 1992 | 1993 | 1980 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | 0.1 | 6.2 | 16.8 | 28.9 | 40.7 | 50.3 | 56.1 | 54.9 | 46.5 | 35.7 | 22.9 | 7.7 | 30.6 |
| Highest Mean Min. Temperature (F) | 11.9 | 23.3 | 25.9 | 34.2 | 48.1 | 54.4 | 60.6 | 59.9 | 51.5 | 42.4 | 29.5 | 18.8 | 60.6 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1984 | 1999 | 1995 | 1998 | 1973 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -12.3 | -6.2 | 7.3 | 23.5 | 33.7 | 44.8 | 49.8 | 49.3 | 41.3 | 29.8 | 13.5 | -5.2 | -12.3 |
| Year Lowest Occurred | 1977 | 1972 | 1972 | 1996 | 1971 | 1982 | 1971 | 1971 | 1974 | 1976 | 1995 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.27 | 0.85 | 1.79 | 2.32 | 3.69 | 3.99 | 4.86 | 4.33 | 4.22 | 3.18 | 2.45 | 1.30 | 34.25 |
| Highest Precipitation (in.) | 3.15 | 2.86 | 4.81 | 3.97 | 6.50 | 8.71 | 11.35 | 7.50 | 8.27 | 6.91 | 6.80 | 3.44 | 11.35 |
| Year Highest Occurred | 1996 | 1981 | 1998 | 1994 | 1993 | 1981 | 1999 | 1972 | 1990 | 1971 | 1991 | 1996 | 1999 |
| Lowest Precipitation (in.) | 0.11 | 0.12 | 0.63 | 0.33 | 0.82 | 1.27 | 0.89 | 1.02 | 1.03 | 1.15 | 0.32 | 0.31 | 0.11 |
| Year Lowest Occurred | 1981 | 1993 | 1978 | 1987 | 1990 | 1995 | 1990 | 1991 | 1976 | 1976 | 1976 | 1979 | 1981 |
| Heating Degree Days (F) | 1694. | 1343. | 1156. | 708. | 341. | 107. | 46. | 62. | 236. | 589. | 1047. | 1517. | 8846. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 25. | 55. | 144. | 106. | 15. | 0. | 0. | 0. | 345. |