| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 15.9 | 23.6 | 35.1 | 50.8 | 65.5 | 72.9 | 77.1 | 74.9 | 64.5 | 51.9 | 33.3 | 20.0 | 48.8 |
| Highest Mean Max. Temperature (F) | 26.2 | 36.4 | 44.1 | 63.5 | 74.7 | 80.3 | 83.5 | 79.9 | 70.9 | 57.1 | 43.8 | 29.6 | 83.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 5.0 | 14.1 | 27.4 | 43.0 | 56.7 | 66.6 | 70.1 | 69.4 | 58.8 | 47.2 | 24.9 | 7.4 | 5.0 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1991 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 5.3 | 12.7 | 24.9 | 39.4 | 52.7 | 61.1 | 65.9 | 63.6 | 53.6 | 42.0 | 25.5 | 10.8 | 38.1 |
| Highest Mean Temperature (F) | 15.1 | 28.3 | 33.9 | 47.0 | 60.0 | 66.6 | 69.9 | 68.5 | 58.6 | 47.5 | 34.2 | 22.0 | 69.9 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1987 | 1977 | 1995 | 1975 | 1983 | 1998 | 1994 | 1999 | 1997 | 1975 |
| Lowest Mean Temperature (F) | -5.4 | 0.6 | 16.5 | 33.4 | 46.5 | 55.5 | 60.0 | 58.4 | 47.8 | 36.0 | 17.6 | -2.4 | -5.4 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1979 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -5.3 | 1.8 | 14.7 | 28.0 | 39.9 | 49.3 | 54.7 | 52.2 | 42.7 | 32.1 | 17.7 | 1.6 | 27.5 |
| Highest Mean Min. Temperature (F) | 8.3 | 20.1 | 24.8 | 33.7 | 45.5 | 53.0 | 58.2 | 57.1 | 47.3 | 38.1 | 24.5 | 14.3 | 58.2 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1991 | 1995 | 1975 | 1983 | 1994 | 1994 | 1999 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -17.4 | -12.9 | 5.6 | 23.2 | 35.2 | 44.4 | 49.8 | 47.4 | 36.0 | 24.7 | 9.3 | -12.3 | -17.4 |
| Year Lowest Occurred | 1996 | 1989 | 1996 | 1996 | 1983 | 1982 | 1971 | 1977 | 1974 | 1976 | 1985 | 1983 | 1996 |
| Mean Precipitation (in.) | 0.79 | 0.60 | 1.02 | 1.54 | 2.60 | 4.34 | 4.71 | 3.51 | 3.19 | 2.46 | 1.35 | 0.73 | 26.84 |
| Highest Precipitation (in.) | 2.19 | 1.62 | 2.34 | 3.83 | 5.54 | 8.92 | 13.51 | 10.32 | 6.08 | 5.40 | 3.58 | 1.67 | 13.51 |
| Year Highest Occurred | 1975 | 1971 | 1979 | 1986 | 1985 | 1994 | 1999 | 1988 | 1986 | 1971 | 1977 | 1995 | 1999 |
| Lowest Precipitation (in.) | 0.30 | 0.00 | 0.23 | 0.24 | 0.41 | 0.80 | 1.78 | 0.88 | 0.52 | 0.42 | 0.09 | 0.15 | 0.00 |
| Year Lowest Occurred | 1979 | 1993 | 1973 | 1987 | 1980 | 1987 | 1984 | 1990 | 1974 | 1976 | 1999 | 1997 | 1993 |
| Heating Degree Days (F) | 1853. | 1465. | 1244. | 768. | 395. | 154. | 61. | 110. | 348. | 714. | 1185. | 1681. | 9978. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 14. | 36. | 89. | 65. | 4. | 0. | 0. | 0. | 208. |