| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.9 | 22.4 | 34.3 | 53.6 | 70.0 | 77.6 | 81.9 | 81.0 | 69.7 | 55.6 | 34.1 | 20.1 | 51.3 |
| Highest Mean Max. Temperature (F) | 28.9 | 34.3 | 44.8 | 66.1 | 80.9 | 86.9 | 88.5 | 87.9 | 76.4 | 60.5 | 46.7 | 31.4 | 88.5 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1980 | 1977 | 1988 | 1989 | 1983 | 1976 | 1973 | 1999 | 1999 | 1989 |
| Lowest Mean Max. Temperature (F) | 2.1 | 5.9 | 24.5 | 41.1 | 58.9 | 71.7 | 73.6 | 74.6 | 64.0 | 49.5 | 22.9 | 8.2 | 2.1 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1979 | 1974 | 1998 | 1992 | 1977 | 1985 | 1991 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 5.3 | 13.1 | 25.7 | 42.3 | 56.8 | 65.2 | 69.4 | 67.8 | 57.0 | 44.3 | 25.8 | 11.3 | 40.3 |
| Highest Mean Temperature (F) | 18.9 | 25.7 | 35.7 | 50.7 | 67.4 | 72.0 | 74.5 | 73.6 | 62.3 | 50.1 | 36.4 | 24.6 | 74.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1989 | 1983 | 1997 | 1973 | 1981 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -7.6 | -3.8 | 15.9 | 33.4 | 48.6 | 58.6 | 62.7 | 61.4 | 52.0 | 39.2 | 12.0 | -0.4 | -7.6 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1979 | 1979 | 1982 | 1992 | 1977 | 1974 | 1991 | 1985 | 2000 | 1979 |
| Mean Min. Temperature (F) | -4.3 | 3.7 | 17.1 | 31.0 | 43.5 | 52.8 | 56.8 | 54.5 | 44.3 | 33.0 | 17.4 | 2.5 | 29.4 |
| Highest Mean Min. Temperature (F) | 8.9 | 20.2 | 29.3 | 36.3 | 54.0 | 59.1 | 61.3 | 59.3 | 49.6 | 40.4 | 28.1 | 17.8 | 61.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1997 | 1983 | 1997 | 1994 | 1981 | 1997 | 1997 |
| Lowest Mean Min. Temperature (F) | -17.7 | -13.5 | 7.3 | 25.8 | 37.8 | 45.3 | 49.8 | 48.2 | 37.8 | 26.0 | 1.0 | -9.6 | -17.7 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1983 | 1982 | 1972 | 1977 | 1974 | 1976 | 1985 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.68 | 0.58 | 0.89 | 1.23 | 2.21 | 3.03 | 3.06 | 2.72 | 1.96 | 1.70 | 0.99 | 0.55 | 19.60 |
| Highest Precipitation (in.) | 1.71 | 1.65 | 2.27 | 3.62 | 5.01 | 7.20 | 9.08 | 5.10 | 5.02 | 5.79 | 3.94 | 1.96 | 9.08 |
| Year Highest Occurred | 1989 | 2000 | 1990 | 1974 | 1999 | 2000 | 1995 | 1974 | 1981 | 1998 | 2000 | 1988 | 1995 |
| Lowest Precipitation (in.) | 0.07 | 0.09 | 0.04 | 0.00 | 0.47 | 0.81 | 0.49 | 0.96 | 0.26 | 0.08 | 0.00 | 0.07 | 0.00 |
| Year Lowest Occurred | 2000 | 1993 | 1986 | 1988 | 1976 | 1972 | 1989 | 1996 | 1998 | 1992 | 1999 | 1979 | 1988 |
| Heating Degree Days (F) | 1860. | 1468. | 1233. | 689. | 294. | 88. | 27. | 53. | 276. | 655. | 1186. | 1660. | 9489. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 30. | 85. | 148. | 127. | 27. | 1. | 0. | 0. | 420. |