| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 17.6 | 26.1 | 38.2 | 54.3 | 68.2 | 74.4 | 78.1 | 76.3 | 66.3 | 54.2 | 35.3 | 22.0 | 50.9 |
| Highest Mean Max. Temperature (F) | 28.6 | 36.1 | 46.7 | 67.7 | 77.9 | 82.8 | 84.2 | 82.8 | 73.0 | 60.3 | 45.4 | 30.3 | 84.2 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1975 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.1 | 16.8 | 29.8 | 46.3 | 60.1 | 68.0 | 70.7 | 70.3 | 60.1 | 48.8 | 26.0 | 11.1 | 6.1 |
| Year Lowest Occurred | 1979 | 1994 | 1996 | 1996 | 1974 | 1985 | 1992 | 1977 | 1993 | 1987 | 1995 | 2000 | 1979 |
| Mean Temperature (F) | 5.9 | 13.9 | 26.3 | 40.9 | 54.0 | 61.6 | 66.3 | 64.2 | 54.8 | 43.5 | 26.8 | 12.1 | 39.2 |
| Highest Mean Temperature (F) | 17.5 | 28.8 | 34.9 | 49.5 | 61.8 | 68.2 | 69.9 | 69.9 | 60.3 | 48.3 | 35.9 | 23.7 | 69.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -7.1 | 1.8 | 17.2 | 34.3 | 47.6 | 56.1 | 60.0 | 58.2 | 49.0 | 37.9 | 18.5 | -0.2 | -7.1 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1996 | 1979 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -5.9 | 1.6 | 14.3 | 27.4 | 39.7 | 48.8 | 54.4 | 52.1 | 43.3 | 32.8 | 18.2 | 2.1 | 27.4 |
| Highest Mean Min. Temperature (F) | 6.3 | 21.7 | 24.0 | 31.9 | 45.8 | 54.6 | 57.8 | 57.7 | 47.5 | 38.5 | 26.8 | 17.1 | 57.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1986 | 1977 | 1995 | 1999 | 1984 | 1998 | 1994 | 1981 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -22.3 | -13.9 | 4.5 | 22.3 | 33.3 | 43.3 | 48.9 | 46.0 | 36.6 | 25.1 | 8.7 | -12.5 | -22.3 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1996 | 1976 | 1982 | 1971 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 1.03 | 0.59 | 0.93 | 1.27 | 2.29 | 4.31 | 3.88 | 3.88 | 3.34 | 2.30 | 1.43 | 0.79 | 26.04 |
| Highest Precipitation (in.) | 3.84 | 1.98 | 1.97 | 3.13 | 5.05 | 6.75 | 8.64 | 9.84 | 8.56 | 5.91 | 3.82 | 1.56 | 9.84 |
| Year Highest Occurred | 1975 | 1971 | 1976 | 1986 | 1982 | 1994 | 1987 | 1988 | 1977 | 1984 | 1977 | 1977 | 1988 |
| Lowest Precipitation (in.) | 0.12 | 0.03 | 0.08 | 0.09 | 0.05 | 0.79 | 1.05 | 1.11 | 0.66 | 0.11 | 0.08 | 0.17 | 0.03 |
| Year Lowest Occurred | 1973 | 1993 | 1992 | 1976 | 1976 | 1987 | 1983 | 1976 | 1976 | 1978 | 1999 | 1985 | 1993 |
| Heating Degree Days (F) | 1835. | 1432. | 1202. | 724. | 364. | 146. | 65. | 106. | 312. | 667. | 1148. | 1642. | 9643. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 21. | 44. | 104. | 81. | 6. | 0. | 0. | 0. | 256. |