| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.4 | 24.6 | 36.5 | 56.2 | 71.3 | 78.8 | 83.3 | 82.3 | 71.2 | 57.2 | 35.6 | 21.5 | 52.9 |
| Highest Mean Max. Temperature (F) | 31.3 | 34.3 | 47.3 | 70.7 | 80.2 | 88.8 | 89.3 | 89.2 | 78.4 | 61.6 | 49.6 | 33.1 | 89.3 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1987 | 1980 | 1988 | 1988 | 1976 | 1976 | 1974 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 1.1 | 7.4 | 27.6 | 43.6 | 61.5 | 72.8 | 74.5 | 75.5 | 63.9 | 51.1 | 25.3 | 7.1 | 1.1 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1975 | 1979 | 1993 | 1992 | 1977 | 1985 | 1991 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 6.3 | 14.0 | 26.5 | 43.3 | 57.5 | 65.8 | 70.1 | 68.6 | 58.2 | 45.6 | 26.7 | 12.0 | 41.2 |
| Highest Mean Temperature (F) | 21.5 | 27.4 | 37.2 | 53.0 | 65.4 | 73.9 | 75.0 | 73.0 | 64.7 | 50.1 | 38.2 | 24.8 | 75.0 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -8.8 | -3.8 | 17.7 | 33.5 | 49.1 | 59.2 | 63.6 | 61.8 | 53.5 | 40.7 | 15.6 | -3.1 | -8.8 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1979 | 1979 | 1982 | 1992 | 1977 | 1985 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -3.9 | 3.3 | 16.5 | 30.4 | 43.6 | 52.8 | 56.9 | 54.9 | 45.1 | 33.9 | 17.8 | 2.4 | 29.5 |
| Highest Mean Min. Temperature (F) | 11.6 | 20.7 | 27.1 | 36.6 | 50.8 | 59.0 | 60.9 | 60.6 | 51.3 | 40.4 | 26.7 | 17.8 | 60.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1998 | 1977 | 1988 | 1989 | 1995 | 1998 | 1994 | 1999 | 1997 | 1989 |
| Lowest Mean Min. Temperature (F) | -18.8 | -15.1 | 7.2 | 23.1 | 36.7 | 45.2 | 51.5 | 48.1 | 39.6 | 27.0 | 5.2 | -13.4 | -18.8 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1979 | 1979 | 1982 | 1971 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.72 | 0.62 | 1.08 | 1.38 | 2.29 | 3.50 | 2.73 | 2.85 | 1.98 | 1.77 | 0.86 | 0.60 | 20.38 |
| Highest Precipitation (in.) | 1.45 | 1.32 | 2.45 | 4.82 | 4.60 | 6.94 | 10.79 | 7.10 | 4.72 | 6.91 | 2.80 | 1.56 | 10.79 |
| Year Highest Occurred | 1975 | 1987 | 1977 | 1986 | 1977 | 1983 | 1987 | 1985 | 1973 | 1982 | 1977 | 1972 | 1987 |
| Lowest Precipitation (in.) | 0.07 | 0.08 | 0.04 | 0.00 | 0.41 | 1.45 | 0.65 | 0.80 | 0.41 | 0.04 | 0.01 | 0.19 | 0.00 |
| Year Lowest Occurred | 1973 | 1993 | 1986 | 1980 | 1984 | 1985 | 1976 | 1976 | 1976 | 1987 | 1999 | 1982 | 1980 |
| Heating Degree Days (F) | 1822. | 1430. | 1194. | 654. | 272. | 88. | 28. | 51. | 234. | 602. | 1149. | 1644. | 9168. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 3. | 37. | 111. | 186. | 161. | 30. | 0. | 0. | 0. | 528. |