| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 29.7 | 38.3 | 50.5 | 62.3 | 71.1 | 78.0 | 85.6 | 85.9 | 77.0 | 62.4 | 40.9 | 28.9 | 59.2 |
| Highest Mean Max. Temperature (F) | 37.2 | 48.5 | 61.2 | 68.4 | 77.5 | 84.5 | 95.0 | 92.6 | 84.8 | 70.3 | 47.3 | 35.3 | 95.0 |
| Year Highest Occurred | 1981 | 1991 | 1992 | 1977 | 1993 | 1992 | 1985 | 1971 | 1987 | 1987 | 1987 | 1979 | 1985 |
| Lowest Mean Max. Temperature (F) | 22.1 | 32.4 | 42.6 | 56.2 | 65.1 | 72.6 | 75.8 | 79.1 | 69.4 | 57.4 | 30.2 | 19.6 | 19.6 |
| Year Lowest Occurred | 1979 | 1989 | 1971 | 1972 | 1996 | 1971 | 1993 | 1995 | 1972 | 1985 | 1985 | 1983 | 1983 |
| Mean Temperature (F) | 21.2 | 28.0 | 37.8 | 46.9 | 55.0 | 61.6 | 67.3 | 67.2 | 58.3 | 46.5 | 32.5 | 21.3 | 45.3 |
| Highest Mean Temperature (F) | 30.6 | 37.6 | 45.2 | 51.5 | 60.5 | 68.0 | 71.9 | 72.0 | 63.8 | 51.4 | 39.4 | 29.4 | 72.0 |
| Year Highest Occurred | 1981 | 1991 | 1992 | 1994 | 1993 | 1992 | 1998 | 1986 | 1998 | 1988 | 1999 | 1999 | 1986 |
| Lowest Mean Temperature (F) | 9.9 | 18.8 | 30.2 | 42.0 | 50.4 | 56.7 | 62.5 | 62.1 | 51.9 | 42.6 | 20.1 | 10.3 | 9.9 |
| Year Lowest Occurred | 1979 | 1985 | 1971 | 1972 | 1984 | 1981 | 1993 | 1995 | 1972 | 1984 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 12.6 | 17.6 | 25.1 | 31.5 | 38.9 | 45.1 | 49.0 | 48.5 | 39.6 | 30.6 | 24.1 | 13.6 | 31.4 |
| Highest Mean Min. Temperature (F) | 24.0 | 28.4 | 30.3 | 37.0 | 44.2 | 51.4 | 54.8 | 52.3 | 44.0 | 33.7 | 33.1 | 23.6 | 54.8 |
| Year Highest Occurred | 1981 | 1998 | 1998 | 1994 | 1998 | 1992 | 1998 | 1991 | 1997 | 1992 | 1999 | 1999 | 1998 |
| Lowest Mean Min. Temperature (F) | -2.4 | 4.0 | 17.7 | 26.2 | 34.9 | 40.2 | 44.1 | 45.0 | 33.9 | 25.7 | 10.0 | 0.9 | -2.4 |
| Year Lowest Occurred | 1979 | 1985 | 1971 | 1982 | 1974 | 1976 | 1972 | 1995 | 1984 | 1972 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 2.00 | 1.50 | 1.05 | 0.77 | 1.02 | 1.06 | 0.80 | 0.72 | 0.61 | 0.93 | 1.99 | 2.60 | 15.05 |
| Highest Precipitation (in.) | 4.43 | 3.12 | 3.48 | 2.34 | 3.21 | 3.33 | 3.52 | 3.35 | 2.49 | 3.51 | 5.28 | 7.17 | 7.17 |
| Year Highest Occurred | 1995 | 1972 | 1995 | 1993 | 1990 | 1992 | 1993 | 1976 | 1978 | 1975 | 1983 | 1996 | 1996 |
| Lowest Precipitation (in.) | 0.09 | 0.19 | 0.01 | 0.00 | 0.00 | 0.13 | 0.02 | 0.00 | 0.00 | 0.04 | 0.12 | 0.21 | 0.00 |
| Year Lowest Occurred | 1977 | 1988 | 1976 | 1973 | 1992 | 1974 | 1984 | 1973 | 1976 | 1987 | 1993 | 1976 | 1973 |
| Heating Degree Days (F) | 1360. | 1037. | 843. | 544. | 315. | 150. | 51. | 48. | 235. | 574. | 974. | 1356. | 7487. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 4. | 45. | 124. | 116. | 35. | 0. | 0. | 0. | 324. |