| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.4 | 26.5 | 38.2 | 54.3 | 68.1 | 76.3 | 80.8 | 78.3 | 68.9 | 56.5 | 38.5 | 24.3 | 52.5 |
| Highest Mean Max. Temperature (F) | 31.4 | 38.0 | 48.4 | 64.4 | 77.8 | 83.4 | 86.9 | 83.4 | 76.7 | 62.3 | 49.3 | 32.4 | 86.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.5 | 16.4 | 30.4 | 45.9 | 60.9 | 71.8 | 73.8 | 74.4 | 62.1 | 51.2 | 29.8 | 12.5 | 6.5 |
| Year Lowest Occurred | 1977 | 1989 | 1975 | 1975 | 1973 | 1993 | 1992 | 1979 | 1993 | 1987 | 1995 | 1983 | 1977 |
| Mean Temperature (F) | 9.3 | 16.2 | 28.7 | 43.6 | 56.6 | 65.1 | 69.8 | 67.3 | 57.8 | 45.8 | 30.3 | 15.5 | 42.2 |
| Highest Mean Temperature (F) | 22.8 | 31.0 | 38.1 | 50.5 | 65.2 | 70.4 | 73.9 | 72.0 | 64.7 | 51.2 | 39.2 | 25.6 | 73.9 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1988 | 1988 | 1998 | 1971 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -5.2 | 5.3 | 19.3 | 36.2 | 49.9 | 59.1 | 64.1 | 61.6 | 52.4 | 39.0 | 23.5 | -0.2 | -5.2 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1991 | 1983 | 1977 |
| Mean Min. Temperature (F) | -0.8 | 5.8 | 19.2 | 32.8 | 45.0 | 53.8 | 58.7 | 56.2 | 46.7 | 35.0 | 22.1 | 6.6 | 31.8 |
| Highest Mean Min. Temperature (F) | 14.2 | 23.9 | 29.1 | 39.9 | 52.5 | 60.4 | 63.3 | 63.1 | 54.6 | 42.4 | 29.0 | 19.1 | 63.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1987 | 1995 | 1994 | 1994 | 1999 | 1997 | 1987 |
| Lowest Mean Min. Temperature (F) | -17.0 | -7.0 | 8.2 | 26.6 | 37.7 | 45.9 | 53.7 | 48.7 | 40.1 | 25.9 | 12.2 | -12.9 | -17.0 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1983 | 1982 | 1980 | 1977 | 1985 | 1976 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.05 | 0.74 | 1.70 | 2.61 | 3.17 | 4.79 | 3.93 | 4.64 | 3.69 | 2.39 | 2.09 | 1.13 | 31.93 |
| Highest Precipitation (in.) | 2.74 | 2.59 | 4.24 | 6.44 | 6.35 | 9.74 | 8.09 | 9.65 | 9.21 | 5.15 | 5.57 | 3.07 | 9.74 |
| Year Highest Occurred | 1996 | 1981 | 1977 | 1975 | 1991 | 1979 | 1995 | 1978 | 1991 | 1995 | 1996 | 1982 | 1979 |
| Lowest Precipitation (in.) | 0.04 | 0.06 | 0.44 | 0.09 | 0.50 | 1.82 | 1.46 | 1.35 | 1.33 | 0.41 | 0.15 | 0.25 | 0.04 |
| Year Lowest Occurred | 1981 | 1997 | 1987 | 1987 | 1976 | 1987 | 1974 | 1976 | 1998 | 1976 | 1976 | 1974 | 1981 |
| Heating Degree Days (F) | 1729. | 1368. | 1125. | 645. | 301. | 93. | 18. | 62. | 239. | 597. | 1042. | 1537. | 8756. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 40. | 95. | 165. | 132. | 24. | 0. | 0. | 0. | 457. |