| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.6 | 27.5 | 39.4 | 55.6 | 69.2 | 78.2 | 82.2 | 79.8 | 71.1 | 59.0 | 40.0 | 25.2 | 54.0 |
| Highest Mean Max. Temperature (F) | 34.2 | 40.3 | 50.1 | 66.2 | 78.5 | 88.0 | 90.3 | 87.0 | 77.7 | 64.9 | 50.7 | 33.2 | 90.3 |
| Year Highest Occurred | 1990 | 1987 | 1981 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1975 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 8.4 | 18.3 | 30.9 | 43.4 | 62.4 | 72.0 | 73.5 | 74.7 | 64.6 | 54.9 | 30.7 | 10.8 | 8.4 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1993 | 1992 | 1985 | 1993 | 1976 | 1996 | 1983 | 1977 |
| Mean Temperature (F) | 10.2 | 16.8 | 29.3 | 44.2 | 57.9 | 67.2 | 71.4 | 68.9 | 59.2 | 47.5 | 31.3 | 16.3 | 43.4 |
| Highest Mean Temperature (F) | 23.6 | 30.0 | 38.3 | 51.8 | 64.7 | 74.2 | 76.5 | 75.0 | 64.7 | 53.5 | 40.0 | 26.2 | 76.5 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1988 | 1988 | 1988 | 1983 | 1978 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -2.4 | 5.6 | 20.2 | 35.4 | 51.0 | 62.3 | 64.1 | 64.4 | 53.6 | 41.9 | 23.5 | 1.7 | -2.4 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1976 | 1996 | 1983 | 1977 |
| Mean Min. Temperature (F) | -0.3 | 6.1 | 19.2 | 32.7 | 46.5 | 56.2 | 60.5 | 57.9 | 47.3 | 36.0 | 22.5 | 7.4 | 32.7 |
| Highest Mean Min. Temperature (F) | 13.0 | 23.2 | 28.5 | 38.0 | 52.9 | 61.4 | 64.3 | 63.1 | 53.0 | 42.3 | 29.2 | 20.0 | 64.3 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1983 | 1983 | 1994 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -13.4 | -7.1 | 9.4 | 27.4 | 39.5 | 50.2 | 54.6 | 53.5 | 41.2 | 28.9 | 14.9 | -7.5 | -13.4 |
| Year Lowest Occurred | 1982 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.78 | 0.64 | 1.56 | 2.30 | 3.26 | 4.39 | 3.91 | 4.24 | 2.96 | 2.19 | 1.81 | 0.78 | 28.82 |
| Highest Precipitation (in.) | 2.81 | 2.02 | 3.38 | 6.19 | 6.27 | 9.05 | 9.40 | 9.46 | 6.80 | 5.92 | 5.05 | 2.05 | 9.46 |
| Year Highest Occurred | 1975 | 1971 | 1998 | 1986 | 1999 | 1990 | 1997 | 1993 | 1986 | 1984 | 1975 | 1982 | 1993 |
| Lowest Precipitation (in.) | 0.02 | 0.04 | 0.44 | 0.55 | 0.69 | 0.08 | 1.36 | 1.77 | 0.39 | 0.16 | 0.12 | 0.06 | 0.02 |
| Year Lowest Occurred | 1990 | 1987 | 1994 | 1979 | 1981 | 1988 | 1979 | 1996 | 2000 | 1978 | 1980 | 1980 | 1990 |
| Heating Degree Days (F) | 1701. | 1350. | 1107. | 627. | 266. | 60. | 19. | 37. | 197. | 543. | 1012. | 1510. | 8429. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 2. | 43. | 126. | 216. | 156. | 24. | 0. | 0. | 0. | 567. |