| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.9 | 24.0 | 36.1 | 53.0 | 67.9 | 75.3 | 79.5 | 77.7 | 67.2 | 54.0 | 33.6 | 19.3 | 50.2 |
| Highest Mean Max. Temperature (F) | 27.5 | 36.9 | 47.3 | 66.6 | 78.3 | 84.4 | 84.1 | 84.7 | 73.9 | 59.6 | 45.7 | 30.1 | 84.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1981 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Max. Temperature (F) | 4.2 | 12.3 | 27.0 | 42.3 | 57.5 | 67.8 | 72.1 | 71.6 | 62.0 | 48.9 | 25.0 | 8.6 | 4.2 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1996 | 1979 | 1985 | 1992 | 1985 | 1993 | 1991 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 3.8 | 11.9 | 24.5 | 41.0 | 55.3 | 63.6 | 68.1 | 66.1 | 55.9 | 44.2 | 26.0 | 10.1 | 39.2 |
| Highest Mean Temperature (F) | 16.4 | 28.7 | 34.7 | 50.3 | 64.2 | 69.4 | 72.6 | 72.5 | 61.0 | 50.0 | 36.1 | 22.4 | 72.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1983 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -8.0 | -0.1 | 14.8 | 31.5 | 47.3 | 57.7 | 61.3 | 59.9 | 51.4 | 38.9 | 16.4 | -1.7 | -8.0 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1996 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | -7.3 | -0.3 | 12.9 | 29.0 | 42.6 | 51.9 | 56.7 | 54.5 | 44.6 | 34.4 | 18.4 | 0.8 | 28.2 |
| Highest Mean Min. Temperature (F) | 5.5 | 20.5 | 22.9 | 34.4 | 50.1 | 56.7 | 62.4 | 60.2 | 49.3 | 40.5 | 27.3 | 14.6 | 62.4 |
| Year Highest Occurred | 1983 | 1998 | 1973 | 1998 | 1977 | 1995 | 1983 | 1983 | 1994 | 1973 | 1983 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -20.2 | -14.5 | 1.8 | 20.7 | 35.8 | 46.0 | 50.5 | 47.9 | 39.9 | 28.3 | 7.9 | -12.1 | -20.2 |
| Year Lowest Occurred | 1979 | 1989 | 1980 | 1996 | 1974 | 1982 | 1992 | 1977 | 1974 | 1987 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.56 | 0.41 | 0.66 | 1.17 | 2.62 | 3.69 | 3.38 | 3.34 | 2.68 | 2.14 | 1.11 | 0.58 | 22.34 |
| Highest Precipitation (in.) | 2.32 | 1.27 | 1.76 | 3.67 | 6.08 | 7.48 | 6.45 | 7.85 | 9.07 | 7.60 | 3.73 | 1.73 | 9.07 |
| Year Highest Occurred | 1987 | 1996 | 1988 | 1979 | 1999 | 1981 | 1994 | 1974 | 1991 | 1971 | 2000 | 1983 | 1991 |
| Lowest Precipitation (in.) | 0.13 | 0.02 | 0.02 | 0.00 | 0.60 | 0.92 | 1.37 | 0.72 | 0.35 | 0.21 | 0.03 | 0.00 | 0.00 |
| Year Lowest Occurred | 1983 | 1982 | 1984 | 1988 | 1976 | 1987 | 2000 | 1991 | 1998 | 1992 | 1976 | 1979 | 1988 |
| Heating Degree Days (F) | 1898. | 1489. | 1256. | 721. | 333. | 110. | 42. | 79. | 283. | 645. | 1171. | 1704. | 9731. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 32. | 69. | 137. | 114. | 10. | 0. | 0. | 0. | 363. |