| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.5 | 25.0 | 36.0 | 51.3 | 66.0 | 72.8 | 76.4 | 74.2 | 64.6 | 53.3 | 35.8 | 22.7 | 49.7 |
| Highest Mean Max. Temperature (F) | 29.7 | 37.6 | 44.4 | 60.8 | 75.6 | 80.2 | 81.4 | 79.4 | 73.6 | 60.3 | 46.0 | 31.0 | 81.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1988 | 1991 | 1998 | 1973 | 1999 | 1994 | 1988 |
| Lowest Mean Max. Temperature (F) | 8.3 | 15.8 | 27.7 | 43.9 | 56.6 | 66.1 | 70.0 | 68.6 | 59.7 | 46.2 | 27.1 | 13.1 | 8.3 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1988 | 1995 | 1985 | 1977 |
| Mean Temperature (F) | 7.2 | 12.6 | 23.9 | 38.4 | 52.6 | 60.6 | 64.8 | 62.9 | 53.7 | 42.8 | 27.7 | 13.4 | 38.4 |
| Highest Mean Temperature (F) | 17.5 | 28.3 | 32.8 | 45.3 | 61.1 | 66.5 | 69.4 | 68.1 | 60.5 | 49.7 | 36.6 | 22.5 | 69.4 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1998 | 1977 | 1995 | 1983 | 1995 | 1998 | 1971 | 1990 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -4.3 | 2.1 | 13.5 | 31.2 | 44.9 | 53.9 | 58.6 | 57.6 | 48.8 | 35.0 | 18.9 | 2.0 | -4.3 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1993 | 1988 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | -4.1 | 0.2 | 11.8 | 25.4 | 39.1 | 48.4 | 53.2 | 51.5 | 42.8 | 32.2 | 19.6 | 4.1 | 27.0 |
| Highest Mean Min. Temperature (F) | 8.0 | 19.0 | 22.0 | 30.8 | 47.7 | 53.1 | 58.6 | 56.9 | 47.3 | 41.2 | 30.5 | 14.2 | 58.6 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1999 | 1991 | 1991 | 1983 | 1995 | 1998 | 1971 | 1990 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -16.9 | -11.6 | -0.8 | 18.3 | 32.8 | 41.6 | 47.2 | 46.6 | 37.2 | 23.8 | 10.0 | -9.8 | -16.9 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1996 | 1971 | 1982 | 1992 | 1977 | 1993 | 1988 | 1976 | 1989 | 1977 |
| Mean Precipitation (in.) | 1.19 | 0.79 | 1.67 | 2.21 | 3.52 | 4.06 | 4.25 | 4.67 | 3.87 | 2.98 | 2.14 | 1.29 | 32.64 |
| Highest Precipitation (in.) | 2.74 | 3.16 | 3.63 | 5.95 | 6.33 | 6.78 | 9.33 | 9.97 | 8.01 | 7.53 | 5.04 | 3.15 | 9.97 |
| Year Highest Occurred | 1996 | 1971 | 1977 | 1991 | 1999 | 1981 | 1996 | 1972 | 1994 | 1995 | 1975 | 1996 | 1972 |
| Lowest Precipitation (in.) | 0.00 | 0.00 | 0.22 | 0.41 | 0.31 | 1.43 | 0.45 | 1.31 | 0.82 | 0.63 | 0.27 | 0.21 | 0.00 |
| Year Lowest Occurred | 1990 | 1991 | 1993 | 1988 | 1986 | 1987 | 1989 | 1993 | 1989 | 1976 | 1981 | 1994 | 1990 |
| Heating Degree Days (F) | 1794. | 1467. | 1274. | 799. | 410. | 170. | 84. | 123. | 342. | 689. | 1118. | 1600. | 9870. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 23. | 38. | 79. | 56. | 3. | 0. | 0. | 0. | 199. |