| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 10.7 | 18.8 | 31.8 | 49.6 | 65.0 | 73.9 | 78.1 | 77.2 | 66.2 | 52.6 | 30.9 | 15.9 | 47.6 |
| Highest Mean Max. Temperature (F) | 24.8 | 34.1 | 46.9 | 62.4 | 74.4 | 83.4 | 83.4 | 83.2 | 73.4 | 59.4 | 44.2 | 27.2 | 83.4 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 2000 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | -0.9 | 5.6 | 23.3 | 37.6 | 52.5 | 67.8 | 69.5 | 70.7 | 60.5 | 47.8 | 22.5 | 3.6 | -0.9 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1979 | 1998 | 1992 | 1977 | 1985 | 1991 | 1996 | 2000 | 1979 |
| Mean Temperature (F) | 0.4 | 8.0 | 21.6 | 39.1 | 54.0 | 63.0 | 67.3 | 65.4 | 54.6 | 41.8 | 22.7 | 7.0 | 37.1 |
| Highest Mean Temperature (F) | 13.9 | 24.1 | 35.8 | 48.0 | 62.2 | 69.9 | 71.8 | 70.2 | 61.1 | 48.0 | 34.4 | 20.0 | 71.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 2000 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -14.9 | -5.8 | 12.8 | 30.7 | 44.9 | 56.8 | 60.2 | 57.3 | 50.7 | 36.3 | 13.6 | -4.8 | -14.9 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -10.0 | -2.8 | 11.3 | 28.5 | 43.0 | 52.1 | 56.5 | 53.6 | 43.0 | 30.9 | 14.5 | -1.9 | 26.6 |
| Highest Mean Min. Temperature (F) | 2.9 | 18.0 | 24.7 | 34.0 | 50.0 | 59.1 | 60.5 | 58.9 | 49.0 | 38.5 | 24.5 | 13.1 | 60.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1999 | 1977 | 1995 | 1975 | 1998 | 1994 | 1994 | 1999 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -29.4 | -17.2 | 1.5 | 22.0 | 35.9 | 45.7 | 50.9 | 43.8 | 37.3 | 23.3 | 4.3 | -13.8 | -29.4 |
| Year Lowest Occurred | 1982 | 1979 | 1980 | 1979 | 1983 | 1982 | 1992 | 1977 | 1981 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.59 | 0.48 | 0.72 | 1.21 | 2.71 | 3.52 | 3.63 | 3.01 | 2.57 | 1.76 | 1.13 | 0.53 | 21.86 |
| Highest Precipitation (in.) | 1.50 | 1.16 | 2.40 | 3.58 | 5.83 | 6.66 | 6.37 | 6.68 | 6.39 | 5.66 | 3.36 | 1.32 | 6.68 |
| Year Highest Occurred | 1989 | 1979 | 1983 | 1979 | 1999 | 1981 | 1982 | 1974 | 1973 | 1971 | 1977 | 1996 | 1974 |
| Lowest Precipitation (in.) | 0.06 | 0.05 | 0.06 | 0.00 | 0.21 | 0.75 | 0.75 | 0.41 | 0.20 | 0.01 | 0.04 | 0.12 | 0.00 |
| Year Lowest Occurred | 1978 | 1993 | 1986 | 1988 | 1980 | 1987 | 1989 | 1997 | 1976 | 1976 | 1999 | 1979 | 1988 |
| Heating Degree Days (F) | 2007. | 1597. | 1347. | 780. | 367. | 130. | 57. | 99. | 321. | 722. | 1268. | 1799. | 10494. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 26. | 70. | 128. | 111. | 9. | 0. | 0. | 0. | 344. |