| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 16.3 | 24.1 | 35.9 | 51.4 | 66.5 | 73.8 | 77.4 | 74.8 | 64.4 | 51.6 | 33.3 | 20.6 | 49.2 |
| Highest Mean Max. Temperature (F) | 27.2 | 35.4 | 44.3 | 63.0 | 76.8 | 80.1 | 83.5 | 81.6 | 71.3 | 57.6 | 44.3 | 29.9 | 83.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.2 | 14.7 | 27.1 | 43.2 | 57.4 | 66.6 | 68.7 | 69.4 | 58.0 | 43.6 | 24.1 | 8.7 | 6.2 |
| Year Lowest Occurred | 1994 | 1979 | 1996 | 1995 | 1997 | 1982 | 1992 | 1985 | 1993 | 1980 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 5.1 | 12.9 | 24.8 | 39.4 | 52.8 | 60.9 | 65.1 | 63.1 | 53.7 | 42.0 | 25.1 | 11.0 | 38.0 |
| Highest Mean Temperature (F) | 16.3 | 27.2 | 34.5 | 47.9 | 61.7 | 65.9 | 69.9 | 68.9 | 58.9 | 48.0 | 34.0 | 22.1 | 69.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -7.2 | 2.8 | 16.2 | 33.1 | 45.2 | 54.6 | 58.2 | 57.4 | 48.2 | 35.9 | 17.1 | -1.8 | -7.2 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1993 | 1980 | 1995 | 1983 | 1982 |
| Mean Min. Temperature (F) | -6.2 | 1.6 | 13.6 | 27.3 | 39.0 | 47.9 | 52.8 | 51.3 | 43.0 | 32.4 | 16.8 | 1.3 | 26.7 |
| Highest Mean Min. Temperature (F) | 5.8 | 19.0 | 24.7 | 32.8 | 46.7 | 52.5 | 58.1 | 56.2 | 46.9 | 38.3 | 24.3 | 14.7 | 58.1 |
| Year Highest Occurred | 1987 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1994 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -21.3 | -11.4 | 4.5 | 22.3 | 32.9 | 38.5 | 46.0 | 45.4 | 37.9 | 25.1 | 9.5 | -12.3 | -21.3 |
| Year Lowest Occurred | 1982 | 1989 | 1980 | 1996 | 1997 | 1985 | 1985 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.85 | 0.54 | 1.11 | 1.58 | 2.73 | 4.64 | 3.87 | 3.74 | 3.44 | 2.45 | 1.41 | 0.69 | 27.05 |
| Highest Precipitation (in.) | 3.28 | 1.92 | 3.01 | 5.24 | 5.27 | 8.20 | 8.08 | 7.68 | 6.55 | 6.66 | 3.65 | 2.01 | 8.20 |
| Year Highest Occurred | 1975 | 1979 | 1979 | 1981 | 1999 | 1976 | 1982 | 1977 | 1986 | 1971 | 1983 | 1984 | 1976 |
| Lowest Precipitation (in.) | 0.22 | 0.08 | 0.11 | 0.28 | 0.42 | 1.83 | 1.37 | 0.59 | 0.73 | 0.31 | 0.13 | 0.19 | 0.08 |
| Year Lowest Occurred | 1977 | 1993 | 1981 | 1987 | 1976 | 1987 | 1976 | 1976 | 1976 | 1978 | 1976 | 1999 | 1993 |
| Heating Degree Days (F) | 1860. | 1460. | 1248. | 768. | 396. | 165. | 89. | 123. | 342. | 713. | 1199. | 1676. | 10039. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 17. | 41. | 92. | 61. | 3. | 0. | 0. | 0. | 214. |