| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.1 | 30.6 | 42.2 | 56.5 | 68.9 | 78.1 | 82.2 | 79.7 | 71.2 | 59.7 | 43.0 | 29.3 | 55.5 |
| Highest Mean Max. Temperature (F) | 36.0 | 40.8 | 51.2 | 65.1 | 78.6 | 84.2 | 87.6 | 87.2 | 77.2 | 67.6 | 54.5 | 38.4 | 87.6 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1976 | 1983 | 1998 | 1975 | 1999 | 1998 | 1976 |
| Lowest Mean Max. Temperature (F) | 11.7 | 20.9 | 35.6 | 49.6 | 62.1 | 73.1 | 75.3 | 75.1 | 63.9 | 53.6 | 34.9 | 18.2 | 11.7 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1993 | 1992 | 1997 | 1993 | 1988 | 1996 | 1983 | 1977 |
| Mean Temperature (F) | 13.5 | 19.7 | 32.0 | 44.9 | 56.6 | 66.1 | 70.6 | 68.2 | 59.3 | 47.8 | 33.5 | 19.7 | 44.3 |
| Highest Mean Temperature (F) | 26.8 | 32.6 | 40.2 | 52.0 | 64.1 | 70.1 | 74.5 | 74.3 | 63.8 | 56.5 | 41.1 | 28.2 | 74.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1977 | 1995 | 1978 | 1971 | 1999 | 1998 | 1977 |
| Lowest Mean Temperature (F) | -1.3 | 7.0 | 25.2 | 39.1 | 50.4 | 59.7 | 64.9 | 63.1 | 53.7 | 41.2 | 26.6 | 7.8 | -1.3 |
| Year Lowest Occurred | 1977 | 1979 | 1984 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1996 | 1983 | 1977 |
| Mean Min. Temperature (F) | 2.8 | 8.8 | 21.8 | 33.2 | 44.3 | 54.0 | 59.0 | 56.6 | 47.3 | 35.8 | 24.0 | 10.1 | 33.1 |
| Highest Mean Min. Temperature (F) | 17.5 | 24.3 | 30.0 | 40.0 | 50.4 | 58.2 | 64.2 | 65.3 | 52.4 | 45.8 | 30.2 | 20.0 | 65.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1985 | 1991 | 1991 | 1999 | 1995 | 1994 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -14.3 | -6.9 | 14.2 | 28.6 | 38.5 | 45.0 | 52.7 | 50.4 | 41.8 | 28.7 | 14.1 | -5.3 | -14.3 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1971 | 1982 | 1971 | 1992 | 1975 | 1988 | 1976 | 1985 | 1977 |
| Mean Precipitation (in.) | 1.02 | 1.01 | 2.00 | 3.41 | 3.58 | 4.06 | 4.13 | 4.28 | 3.77 | 2.39 | 2.20 | 1.12 | 32.97 |
| Highest Precipitation (in.) | 2.42 | 3.53 | 4.30 | 7.21 | 7.06 | 10.30 | 7.93 | 13.81 | 11.31 | 8.21 | 5.50 | 2.69 | 13.81 |
| Year Highest Occurred | 1996 | 1971 | 1998 | 1981 | 1973 | 1990 | 1999 | 1980 | 1992 | 1984 | 1982 | 1982 | 1980 |
| Lowest Precipitation (in.) | 0.10 | 0.10 | 0.27 | 0.50 | 0.78 | 0.72 | 1.35 | 0.59 | 0.71 | 0.74 | 0.00 | 0.13 | 0.00 |
| Year Lowest Occurred | 1981 | 1995 | 1994 | 1997 | 1981 | 1976 | 1990 | 1976 | 1982 | 1988 | 1976 | 1993 | 1976 |
| Heating Degree Days (F) | 1598. | 1268. | 1024. | 605. | 290. | 64. | 20. | 47. | 194. | 538. | 946. | 1403. | 7997. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 28. | 95. | 193. | 146. | 21. | 2. | 0. | 0. | 486. |