| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.6 | 22.3 | 34.5 | 52.7 | 67.9 | 76.3 | 81.5 | 80.3 | 68.6 | 54.7 | 35.4 | 19.9 | 50.7 |
| Highest Mean Max. Temperature (F) | 29.1 | 33.8 | 45.8 | 65.2 | 76.4 | 84.8 | 88.2 | 86.6 | 75.6 | 59.9 | 48.7 | 30.7 | 88.2 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1980 | 1988 | 1988 | 1984 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 0.9 | 8.2 | 25.4 | 40.4 | 56.3 | 70.4 | 73.3 | 73.2 | 62.8 | 50.9 | 25.7 | 7.8 | 0.9 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1975 | 1979 | 1985 | 1992 | 1977 | 1993 | 1995 | 1996 | 1983 | 1979 |
| Mean Temperature (F) | 3.8 | 11.7 | 25.2 | 41.8 | 56.2 | 64.8 | 69.8 | 68.1 | 56.8 | 43.2 | 26.4 | 10.0 | 39.8 |
| Highest Mean Temperature (F) | 17.7 | 26.3 | 35.7 | 50.5 | 65.5 | 71.3 | 73.9 | 72.9 | 63.2 | 48.6 | 37.6 | 21.2 | 73.9 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -10.4 | -3.1 | 16.0 | 32.2 | 46.8 | 58.7 | 62.7 | 61.7 | 50.7 | 38.5 | 16.0 | -2.9 | -10.4 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -7.1 | 1.1 | 15.8 | 30.8 | 44.5 | 53.2 | 58.0 | 55.9 | 45.0 | 31.7 | 17.4 | 0.0 | 28.9 |
| Highest Mean Min. Temperature (F) | 8.6 | 19.5 | 26.3 | 35.7 | 54.6 | 58.0 | 61.6 | 59.8 | 50.7 | 37.3 | 26.4 | 13.3 | 61.6 |
| Year Highest Occurred | 1987 | 1998 | 1973 | 1987 | 1977 | 1991 | 1983 | 1995 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -21.8 | -14.4 | 6.1 | 23.8 | 37.2 | 45.8 | 52.1 | 50.1 | 37.3 | 25.3 | 5.2 | -13.6 | -21.8 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.51 | 0.34 | 0.95 | 1.40 | 2.26 | 3.65 | 4.11 | 2.57 | 2.43 | 2.03 | 0.85 | 0.46 | 21.56 |
| Highest Precipitation (in.) | 1.83 | 1.96 | 2.14 | 4.53 | 4.50 | 12.09 | 8.60 | 4.98 | 6.87 | 9.33 | 2.38 | 1.49 | 12.09 |
| Year Highest Occurred | 1975 | 1979 | 1977 | 1986 | 1985 | 1975 | 1983 | 1980 | 1973 | 1984 | 1977 | 1972 | 1975 |
| Lowest Precipitation (in.) | 0.00 | 0.04 | 0.24 | 0.01 | 0.28 | 0.71 | 1.20 | 0.57 | 0.02 | 0.16 | 0.04 | 0.00 | 0.00 |
| Year Lowest Occurred | 1973 | 1973 | 1978 | 1980 | 1976 | 1972 | 1984 | 1976 | 1974 | 1992 | 1990 | 1986 | 1973 |
| Heating Degree Days (F) | 1900. | 1492. | 1236. | 699. | 312. | 98. | 26. | 58. | 267. | 676. | 1158. | 1706. | 9628. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 39. | 90. | 173. | 153. | 21. | 0. | 0. | 0. | 478. |