| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.2 | 24.9 | 36.6 | 54.4 | 69.1 | 77.3 | 81.5 | 80.0 | 70.8 | 57.5 | 37.6 | 23.6 | 52.6 |
| Highest Mean Max. Temperature (F) | 32.4 | 39.7 | 48.4 | 65.7 | 78.7 | 88.5 | 88.9 | 86.7 | 79.3 | 64.0 | 52.0 | 34.5 | 88.9 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1988 | 1988 | 1988 | 1976 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | 6.0 | 10.8 | 28.4 | 41.9 | 61.7 | 70.8 | 72.9 | 74.6 | 64.2 | 53.0 | 27.2 | 7.6 | 6.0 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1975 | 1979 | 1993 | 1992 | 1985 | 1993 | 1995 | 1996 | 1983 | 1979 |
| Mean Temperature (F) | 8.4 | 15.4 | 28.1 | 44.1 | 57.9 | 66.9 | 71.1 | 69.0 | 59.0 | 46.1 | 29.0 | 14.6 | 42.5 |
| Highest Mean Temperature (F) | 22.9 | 30.2 | 38.3 | 51.9 | 66.8 | 74.9 | 75.9 | 74.3 | 65.7 | 51.6 | 39.1 | 24.9 | 75.9 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -4.9 | -0.1 | 18.3 | 36.2 | 51.4 | 61.4 | 64.2 | 64.6 | 53.2 | 41.2 | 19.7 | -0.7 | -4.9 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1975 | 1979 | 1982 | 1992 | 1992 | 1993 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -1.5 | 5.9 | 19.5 | 33.7 | 46.7 | 56.5 | 60.6 | 57.9 | 47.1 | 34.6 | 20.3 | 5.5 | 32.2 |
| Highest Mean Min. Temperature (F) | 13.3 | 21.9 | 29.6 | 38.9 | 55.0 | 62.0 | 64.5 | 63.0 | 52.1 | 39.7 | 27.4 | 18.3 | 64.5 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1983 | 1983 | 1998 | 1998 | 1983 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -16.9 | -10.9 | 7.7 | 29.2 | 41.1 | 49.7 | 55.3 | 53.5 | 41.5 | 27.7 | 11.0 | -9.4 | -16.9 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1996 | 1997 | 1982 | 1971 | 1992 | 1974 | 1976 | 1985 | 2000 | 1982 |
| Mean Precipitation (in.) | 0.85 | 0.69 | 1.52 | 2.01 | 2.84 | 3.97 | 3.95 | 3.30 | 2.16 | 2.30 | 1.22 | 0.58 | 25.39 |
| Highest Precipitation (in.) | 2.69 | 1.63 | 3.77 | 6.18 | 6.74 | 7.62 | 7.91 | 6.34 | 4.56 | 9.21 | 3.41 | 1.74 | 9.21 |
| Year Highest Occurred | 1975 | 1971 | 1995 | 1986 | 1985 | 1971 | 1993 | 1984 | 1988 | 1984 | 2000 | 1972 | 1984 |
| Lowest Precipitation (in.) | 0.02 | 0.15 | 0.30 | 0.15 | 0.39 | 0.49 | 1.21 | 1.15 | 0.22 | 0.08 | 0.07 | 0.01 | 0.01 |
| Year Lowest Occurred | 1974 | 1983 | 1996 | 1980 | 1976 | 1988 | 1990 | 1979 | 1979 | 1978 | 1999 | 1986 | 1986 |
| Heating Degree Days (F) | 1757. | 1390. | 1145. | 631. | 266. | 66. | 20. | 39. | 211. | 588. | 1081. | 1564. | 8758. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 46. | 122. | 207. | 162. | 29. | 0. | 0. | 0. | 568. |