| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.6 | 26.4 | 38.2 | 55.6 | 68.9 | 77.0 | 81.7 | 80.3 | 71.4 | 58.0 | 36.8 | 23.7 | 53.1 |
| Highest Mean Max. Temperature (F) | 34.5 | 39.4 | 50.0 | 66.1 | 76.7 | 86.9 | 89.3 | 89.4 | 78.6 | 64.6 | 52.0 | 37.6 | 89.4 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1976 | 1983 | 1998 | 1973 | 1999 | 1979 | 1983 |
| Lowest Mean Max. Temperature (F) | 5.2 | 13.6 | 27.8 | 41.9 | 61.7 | 70.2 | 70.9 | 74.2 | 64.8 | 51.9 | 25.6 | 6.8 | 5.2 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1975 | 1996 | 1993 | 1992 | 1992 | 1985 | 1995 | 1985 | 1983 | 1994 |
| Mean Temperature (F) | 9.2 | 16.2 | 27.9 | 42.9 | 55.7 | 64.3 | 69.1 | 67.6 | 58.2 | 45.7 | 27.5 | 14.0 | 41.5 |
| Highest Mean Temperature (F) | 23.9 | 29.8 | 37.0 | 50.8 | 63.5 | 73.0 | 74.3 | 74.8 | 65.1 | 51.6 | 39.2 | 25.7 | 74.8 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1979 | 1983 |
| Lowest Mean Temperature (F) | -4.2 | 2.9 | 18.7 | 33.4 | 49.9 | 58.8 | 60.9 | 62.2 | 53.4 | 41.4 | 15.9 | -4.7 | -4.7 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1975 | 1979 | 1982 | 1992 | 1977 | 1993 | 1976 | 1985 | 1983 | 1983 |
| Mean Min. Temperature (F) | -1.3 | 5.9 | 17.5 | 30.1 | 42.5 | 51.5 | 56.4 | 54.9 | 45.0 | 33.3 | 18.1 | 4.3 | 29.9 |
| Highest Mean Min. Temperature (F) | 13.2 | 21.4 | 25.2 | 35.8 | 50.2 | 59.1 | 61.4 | 60.6 | 51.5 | 38.6 | 26.4 | 15.0 | 61.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1988 | 1999 | 1995 | 1998 | 1973 | 1999 | 1987 | 1999 |
| Lowest Mean Min. Temperature (F) | -16.9 | -8.8 | 7.8 | 23.9 | 36.3 | 44.3 | 48.9 | 48.9 | 38.5 | 27.5 | 6.1 | -16.2 | -16.9 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1983 | 1979 | 1982 | 1971 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.59 | 0.52 | 1.44 | 2.03 | 2.83 | 3.65 | 3.64 | 3.23 | 2.06 | 1.86 | 0.93 | 0.35 | 23.13 |
| Highest Precipitation (in.) | 1.41 | 1.64 | 6.46 | 6.56 | 7.18 | 9.44 | 9.29 | 6.86 | 4.69 | 6.80 | 4.52 | 0.83 | 9.44 |
| Year Highest Occurred | 1999 | 1998 | 1977 | 1986 | 1972 | 1971 | 1993 | 1995 | 1986 | 1998 | 2000 | 1977 | 1971 |
| Lowest Precipitation (in.) | 0.00 | 0.12 | 0.01 | 0.11 | 0.52 | 0.59 | 0.94 | 0.99 | 0.05 | 0.17 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1974 | 1973 | 1971 | 1996 | 1976 | 1997 | 1975 | 2000 | 1998 | 1978 | 1979 | 1986 | 1974 |
| Heating Degree Days (F) | 1733. | 1368. | 1151. | 669. | 311. | 101. | 50. | 63. | 229. | 600. | 1126. | 1581. | 8982. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 4. | 22. | 78. | 175. | 143. | 26. | 0. | 0. | 0. | 448. |