| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.4 | 23.7 | 35.7 | 53.8 | 68.6 | 76.6 | 81.0 | 80.0 | 69.4 | 56.6 | 36.6 | 21.8 | 51.7 |
| Highest Mean Max. Temperature (F) | 31.9 | 37.4 | 47.8 | 66.3 | 76.8 | 87.1 | 86.5 | 86.8 | 77.6 | 61.6 | 51.3 | 32.7 | 87.1 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1976 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 3.9 | 11.6 | 26.9 | 40.6 | 60.6 | 70.4 | 71.7 | 74.4 | 63.8 | 52.3 | 26.1 | 5.4 | 3.9 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1979 | 1993 | 1992 | 1985 | 1993 | 1980 | 1996 | 1983 | 1977 |
| Mean Temperature (F) | 5.9 | 13.6 | 25.9 | 42.4 | 56.6 | 64.9 | 69.6 | 68.0 | 57.5 | 44.9 | 27.6 | 12.6 | 40.8 |
| Highest Mean Temperature (F) | 20.3 | 27.8 | 36.1 | 51.2 | 64.0 | 73.2 | 74.1 | 71.8 | 64.1 | 49.6 | 39.3 | 23.7 | 74.1 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1975 | 1983 | 1998 | 1973 | 1999 | 1997 | 1975 |
| Lowest Mean Temperature (F) | -6.9 | 1.3 | 16.7 | 34.2 | 49.9 | 59.5 | 62.1 | 63.1 | 52.9 | 40.8 | 17.9 | -3.6 | -6.9 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1988 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -4.7 | 3.4 | 16.0 | 31.0 | 44.5 | 53.2 | 58.2 | 56.0 | 45.6 | 33.1 | 18.6 | 3.3 | 29.9 |
| Highest Mean Min. Temperature (F) | 8.7 | 22.1 | 24.4 | 36.4 | 51.2 | 59.2 | 62.7 | 60.3 | 50.5 | 39.1 | 27.3 | 16.9 | 62.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1976 | 1977 | 1988 | 1975 | 1995 | 1998 | 1994 | 1999 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -18.6 | -10.6 | 6.5 | 26.2 | 39.2 | 46.9 | 52.4 | 51.1 | 37.5 | 28.3 | 9.0 | -12.7 | -18.6 |
| Year Lowest Occurred | 1982 | 1989 | 1975 | 1996 | 1983 | 1982 | 1992 | 1974 | 1974 | 1972 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.77 | 0.52 | 1.15 | 1.82 | 2.63 | 4.32 | 3.39 | 3.11 | 2.15 | 2.05 | 1.02 | 0.42 | 23.35 |
| Highest Precipitation (in.) | 3.14 | 1.87 | 2.65 | 4.22 | 6.72 | 7.74 | 5.52 | 5.34 | 4.42 | 6.26 | 2.98 | 1.76 | 7.74 |
| Year Highest Occurred | 1975 | 1979 | 1975 | 1986 | 1985 | 1981 | 1972 | 1982 | 1977 | 1984 | 1977 | 1983 | 1981 |
| Lowest Precipitation (in.) | 0.00 | 0.14 | 0.04 | 0.00 | 0.23 | 0.68 | 0.92 | 0.38 | 0.33 | 0.08 | 0.09 | 0.00 | 0.00 |
| Year Lowest Occurred | 1988 | 1988 | 1986 | 1980 | 1983 | 1974 | 1976 | 1976 | 1979 | 1976 | 1984 | 1988 | 1988 |
| Heating Degree Days (F) | 1835. | 1440. | 1213. | 679. | 293. | 94. | 33. | 45. | 243. | 625. | 1122. | 1627. | 9249. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 30. | 92. | 175. | 137. | 18. | 0. | 0. | 0. | 453. |