| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.4 | 24.1 | 36.7 | 54.8 | 69.4 | 76.1 | 80.5 | 79.1 | 69.1 | 55.9 | 35.1 | 21.0 | 51.5 |
| Highest Mean Max. Temperature (F) | 29.9 | 35.6 | 48.8 | 67.4 | 77.8 | 86.3 | 86.7 | 86.1 | 79.4 | 61.7 | 49.6 | 32.5 | 86.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 2000 | 1999 | 1999 | 1989 |
| Lowest Mean Max. Temperature (F) | 3.1 | 11.3 | 26.5 | 40.4 | 60.3 | 70.1 | 71.5 | 72.6 | 62.7 | 50.7 | 25.6 | 7.3 | 3.1 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1979 | 1993 | 1992 | 1977 | 1975 | 1995 | 1996 | 1983 | 1979 |
| Mean Temperature (F) | 6.1 | 13.7 | 26.9 | 43.0 | 56.9 | 64.6 | 69.3 | 67.9 | 58.0 | 45.7 | 27.6 | 12.4 | 41.0 |
| Highest Mean Temperature (F) | 18.8 | 28.1 | 37.5 | 51.6 | 66.3 | 72.0 | 74.2 | 74.6 | 66.4 | 52.1 | 37.8 | 22.9 | 74.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1999 | 1983 | 1998 | 1973 | 1999 | 1999 | 1983 |
| Lowest Mean Temperature (F) | -6.3 | -0.1 | 15.6 | 34.6 | 49.7 | 58.1 | 61.6 | 62.3 | 52.6 | 40.7 | 18.2 | -1.2 | -6.3 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1988 | 1996 | 1983 | 1982 |
| Mean Min. Temperature (F) | -4.3 | 3.2 | 17.1 | 31.2 | 44.3 | 53.1 | 58.0 | 56.6 | 46.8 | 35.5 | 20.0 | 3.7 | 30.4 |
| Highest Mean Min. Temperature (F) | 7.8 | 21.5 | 27.8 | 37.5 | 54.8 | 58.0 | 63.3 | 63.0 | 53.3 | 43.1 | 27.6 | 13.6 | 63.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1999 | 1977 | 1995 | 1975 | 1973 | 1998 | 1973 | 1998 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -17.6 | -12.4 | 4.3 | 25.4 | 38.5 | 45.5 | 51.7 | 51.6 | 42.3 | 28.4 | 10.7 | -9.7 | -17.6 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1983 | 1982 | 1992 | 1994 | 1993 | 1988 | 1996 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.76 | 0.57 | 1.15 | 1.54 | 2.97 | 4.41 | 4.03 | 3.67 | 3.02 | 2.50 | 1.10 | 0.64 | 26.36 |
| Highest Precipitation (in.) | 2.58 | 2.03 | 2.69 | 5.15 | 8.84 | 9.24 | 11.14 | 6.27 | 6.91 | 6.35 | 3.88 | 1.41 | 11.14 |
| Year Highest Occurred | 1975 | 1979 | 1995 | 1986 | 1985 | 1983 | 1983 | 1988 | 1986 | 1984 | 2000 | 1977 | 1983 |
| Lowest Precipitation (in.) | 0.13 | 0.08 | 0.28 | 0.07 | 0.42 | 1.23 | 0.40 | 0.65 | 0.42 | 0.08 | 0.00 | 0.07 | 0.00 |
| Year Lowest Occurred | 1992 | 1988 | 1996 | 1980 | 1976 | 1982 | 1989 | 1976 | 1974 | 1991 | 1999 | 1994 | 1999 |
| Heating Degree Days (F) | 1829. | 1438. | 1183. | 661. | 290. | 106. | 44. | 72. | 234. | 599. | 1124. | 1632. | 9212. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 37. | 95. | 174. | 160. | 21. | 0. | 0. | 0. | 489. |