| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 22.4 | 28.9 | 40.7 | 55.7 | 68.0 | 77.7 | 81.5 | 78.9 | 70.8 | 58.5 | 40.6 | 26.9 | 54.2 |
| Highest Mean Max. Temperature (F) | 33.6 | 38.4 | 49.7 | 65.8 | 76.9 | 85.8 | 88.4 | 85.6 | 77.3 | 66.3 | 51.3 | 35.9 | 88.4 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 8.2 | 17.9 | 34.2 | 45.8 | 61.8 | 72.5 | 73.5 | 74.1 | 62.7 | 53.9 | 32.9 | 14.9 | 8.2 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1979 | 1983 | 1982 | 1992 | 1992 | 1993 | 1987 | 1996 | 1983 | 1979 |
| Mean Temperature (F) | 12.9 | 19.3 | 31.1 | 44.8 | 57.0 | 66.7 | 70.7 | 68.4 | 59.4 | 47.6 | 32.0 | 18.4 | 44.0 |
| Highest Mean Temperature (F) | 25.7 | 31.3 | 39.6 | 52.0 | 63.6 | 71.6 | 75.2 | 74.7 | 65.1 | 54.5 | 41.0 | 26.7 | 75.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1988 | 1988 | 1995 | 1998 | 1971 | 1999 | 1998 | 1988 |
| Lowest Mean Temperature (F) | -0.8 | 6.7 | 22.4 | 38.0 | 48.3 | 61.3 | 64.6 | 63.8 | 53.7 | 42.3 | 25.1 | 5.6 | -0.8 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1979 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1991 | 1983 | 1979 |
| Mean Min. Temperature (F) | 3.4 | 9.7 | 21.5 | 33.9 | 45.9 | 55.6 | 59.8 | 57.8 | 48.0 | 36.6 | 23.3 | 9.8 | 33.8 |
| Highest Mean Min. Temperature (F) | 17.7 | 24.5 | 29.6 | 40.0 | 52.6 | 61.9 | 63.6 | 65.6 | 52.9 | 43.5 | 30.6 | 18.7 | 65.6 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1991 | 1991 | 1999 | 1995 | 1998 | 1994 | 1999 | 1987 | 1995 |
| Lowest Mean Min. Temperature (F) | -11.9 | -4.5 | 10.6 | 27.3 | 34.3 | 50.0 | 54.8 | 53.3 | 40.8 | 29.4 | 13.5 | -3.7 | -11.9 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1971 | 1971 | 1975 | 1976 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 0.98 | 0.82 | 1.95 | 3.67 | 3.83 | 4.57 | 4.71 | 4.85 | 3.52 | 2.44 | 2.38 | 1.27 | 34.99 |
| Highest Precipitation (in.) | 2.27 | 3.58 | 4.65 | 7.57 | 6.56 | 10.31 | 10.76 | 10.62 | 8.43 | 5.58 | 6.00 | 4.53 | 10.76 |
| Year Highest Occurred | 1979 | 1971 | 1976 | 1973 | 1973 | 1984 | 1987 | 1980 | 1972 | 1998 | 1991 | 1984 | 1987 |
| Lowest Precipitation (in.) | 0.13 | 0.00 | 0.35 | 0.64 | 1.16 | 1.29 | 1.43 | 1.37 | 0.27 | 0.44 | 0.04 | 0.00 | 0.00 |
| Year Lowest Occurred | 1981 | 1997 | 1978 | 2000 | 1989 | 1988 | 1996 | 1976 | 1979 | 1987 | 1976 | 1998 | 1997 |
| Heating Degree Days (F) | 1615. | 1280. | 1051. | 607. | 284. | 61. | 15. | 44. | 192. | 541. | 992. | 1447. | 8129. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 35. | 110. | 193. | 148. | 24. | 1. | 0. | 0. | 513. |