| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.0 | 26.5 | 35.4 | 48.1 | 61.2 | 70.6 | 76.6 | 75.4 | 66.7 | 54.6 | 38.2 | 26.1 | 50.0 |
| Highest Mean Max. Temperature (F) | 30.7 | 38.6 | 45.5 | 58.7 | 72.4 | 81.9 | 86.2 | 80.4 | 73.5 | 60.9 | 48.3 | 34.5 | 86.2 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1988 | 1988 | 1988 | 1998 | 1998 | 2000 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 10.4 | 14.3 | 28.8 | 40.3 | 52.2 | 64.4 | 70.0 | 70.1 | 61.0 | 48.3 | 31.0 | 15.4 | 10.4 |
| Year Lowest Occurred | 1979 | 1979 | 1972 | 1975 | 1979 | 1982 | 1992 | 1982 | 1974 | 1988 | 1995 | 1983 | 1979 |
| Mean Temperature (F) | 12.2 | 16.3 | 25.6 | 38.0 | 49.5 | 58.9 | 65.6 | 64.8 | 56.5 | 45.4 | 31.5 | 19.2 | 40.3 |
| Highest Mean Temperature (F) | 21.6 | 30.8 | 35.0 | 46.2 | 56.6 | 65.6 | 72.4 | 70.0 | 62.3 | 50.9 | 39.5 | 28.4 | 72.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1988 | 1988 | 1988 | 1998 | 1998 | 1971 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | 0.3 | 2.7 | 17.9 | 32.6 | 42.3 | 52.7 | 59.6 | 59.8 | 51.0 | 39.7 | 24.9 | 7.8 | 0.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1979 | 1982 | 1992 | 1977 | 1974 | 1976 | 1995 | 1983 | 1977 |
| Mean Min. Temperature (F) | 3.4 | 6.1 | 15.7 | 27.8 | 37.7 | 47.2 | 54.5 | 54.2 | 46.2 | 36.1 | 24.7 | 12.3 | 30.5 |
| Highest Mean Min. Temperature (F) | 13.5 | 22.9 | 24.4 | 33.6 | 43.7 | 51.9 | 59.6 | 59.5 | 51.3 | 42.6 | 30.7 | 22.2 | 59.6 |
| Year Highest Occurred | 1998 | 1998 | 2000 | 1987 | 1991 | 1999 | 1999 | 1998 | 1994 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -10.3 | -9.0 | 6.6 | 22.8 | 32.2 | 40.9 | 49.1 | 49.0 | 40.0 | 30.1 | 18.2 | 0.1 | -10.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1996 | 1983 | 1982 | 1992 | 1977 | 1976 | 1976 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.64 | 1.14 | 2.05 | 2.40 | 3.29 | 4.16 | 3.98 | 3.98 | 3.58 | 2.74 | 2.66 | 1.56 | 33.18 |
| Highest Precipitation (in.) | 4.01 | 3.40 | 4.99 | 7.00 | 8.80 | 9.05 | 10.44 | 10.06 | 9.56 | 5.71 | 8.35 | 2.84 | 10.44 |
| Year Highest Occurred | 1975 | 1971 | 1977 | 1991 | 1985 | 1985 | 1987 | 1972 | 1990 | 1982 | 1991 | 1996 | 1987 |
| Lowest Precipitation (in.) | 0.00 | 0.08 | 0.08 | 0.15 | 1.04 | 0.77 | 1.15 | 1.57 | 0.92 | 0.68 | 0.33 | 0.26 | 0.00 |
| Year Lowest Occurred | 1990 | 1993 | 1999 | 1988 | 1975 | 1995 | 1989 | 1996 | 1976 | 1976 | 1990 | 1994 | 1990 |
| Heating Degree Days (F) | 1638. | 1364. | 1223. | 813. | 492. | 213. | 82. | 92. | 271. | 610. | 1007. | 1419. | 9224. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 10. | 29. | 100. | 86. | 15. | 0. | 0. | 0. | 240. |