| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 19.3 | 25.6 | 35.6 | 49.7 | 64.2 | 72.5 | 76.5 | 74.5 | 65.0 | 53.0 | 36.4 | 24.0 | 49.7 |
| Highest Mean Max. Temperature (F) | 29.7 | 37.9 | 44.0 | 60.0 | 75.8 | 78.3 | 82.0 | 79.5 | 71.7 | 60.5 | 45.7 | 31.4 | 82.0 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1987 | 1983 | 1983 | 1998 | 1973 | 1999 | 1994 | 1983 |
| Lowest Mean Max. Temperature (F) | 9.5 | 17.1 | 27.1 | 41.8 | 54.5 | 66.5 | 68.4 | 68.6 | 58.7 | 46.3 | 26.4 | 13.7 | 9.5 |
| Year Lowest Occurred | 1994 | 1994 | 1996 | 1995 | 1997 | 1982 | 1992 | 1977 | 1993 | 1987 | 1995 | 1989 | 1994 |
| Mean Temperature (F) | 9.5 | 14.7 | 25.0 | 39.0 | 52.4 | 61.2 | 65.6 | 63.5 | 54.7 | 43.6 | 28.9 | 15.7 | 39.5 |
| Highest Mean Temperature (F) | 18.8 | 29.6 | 33.8 | 46.2 | 62.0 | 65.4 | 70.9 | 68.2 | 60.5 | 50.8 | 37.1 | 23.9 | 70.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1971 | 1983 | 1983 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -1.5 | 4.8 | 16.1 | 31.4 | 44.3 | 55.4 | 58.6 | 56.2 | 48.9 | 38.1 | 19.0 | 5.0 | -1.5 |
| Year Lowest Occurred | 1977 | 1989 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1974 | 1980 | 1995 | 1989 | 1977 |
| Mean Min. Temperature (F) | -0.3 | 3.7 | 14.3 | 28.2 | 40.6 | 49.8 | 54.6 | 52.5 | 44.3 | 34.2 | 21.4 | 7.3 | 29.2 |
| Highest Mean Min. Temperature (F) | 10.3 | 21.3 | 25.2 | 34.7 | 48.2 | 53.9 | 59.8 | 57.5 | 49.3 | 42.3 | 29.0 | 17.0 | 59.8 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1977 | 1991 | 1983 | 1995 | 1998 | 1971 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -13.3 | -7.8 | 4.9 | 20.8 | 33.6 | 44.2 | 48.7 | 43.8 | 38.4 | 27.0 | 11.5 | -3.8 | -13.3 |
| Year Lowest Occurred | 1977 | 1989 | 1984 | 1996 | 1981 | 1982 | 1992 | 1977 | 1976 | 1976 | 1995 | 1989 | 1977 |
| Mean Precipitation (in.) | 2.07 | 1.22 | 2.08 | 2.11 | 2.97 | 4.16 | 4.00 | 3.72 | 3.80 | 3.38 | 3.09 | 2.05 | 34.65 |
| Highest Precipitation (in.) | 4.31 | 3.21 | 4.50 | 4.01 | 4.64 | 7.06 | 9.18 | 7.09 | 7.42 | 6.73 | 8.16 | 3.83 | 9.18 |
| Year Highest Occurred | 1997 | 1971 | 1976 | 1985 | 1999 | 1986 | 1982 | 1972 | 1985 | 1995 | 1991 | 1996 | 1982 |
| Lowest Precipitation (in.) | 0.63 | 0.18 | 0.66 | 0.48 | 0.65 | 1.46 | 0.99 | 1.52 | 1.17 | 1.27 | 0.64 | 0.36 | 0.18 |
| Year Lowest Occurred | 1984 | 1998 | 1974 | 1988 | 1986 | 1982 | 1976 | 1976 | 1976 | 1997 | 1981 | 1994 | 1998 |
| Heating Degree Days (F) | 1722. | 1410. | 1243. | 782. | 414. | 156. | 71. | 117. | 318. | 664. | 1083. | 1531. | 9511. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 23. | 40. | 88. | 71. | 6. | 0. | 0. | 0. | 228. |