| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.2 | 24.2 | 34.9 | 49.3 | 64.3 | 71.2 | 74.8 | 72.6 | 63.5 | 52.0 | 36.0 | 22.8 | 48.7 |
| Highest Mean Max. Temperature (F) | 32.2 | 36.3 | 43.4 | 60.5 | 74.4 | 80.6 | 83.1 | 78.5 | 72.1 | 58.2 | 45.1 | 30.3 | 83.1 |
| Year Highest Occurred | 1990 | 1998 | 1990 | 1987 | 1988 | 1988 | 1988 | 1988 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 7.9 | 15.1 | 26.8 | 41.1 | 55.6 | 63.5 | 68.1 | 67.8 | 57.1 | 46.3 | 27.9 | 12.7 | 7.9 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1995 | 1973 | 1982 | 1992 | 1977 | 1974 | 1980 | 1995 | 1985 | 1977 |
| Mean Temperature (F) | 7.3 | 12.0 | 23.5 | 37.9 | 52.1 | 60.5 | 64.9 | 62.7 | 53.6 | 42.2 | 27.7 | 13.6 | 38.2 |
| Highest Mean Temperature (F) | 20.1 | 27.6 | 31.2 | 44.9 | 60.4 | 66.4 | 68.8 | 67.6 | 59.5 | 48.1 | 35.4 | 23.0 | 68.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1995 | 1983 | 1995 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -3.9 | 2.1 | 14.7 | 31.0 | 44.7 | 53.4 | 58.8 | 57.4 | 47.4 | 37.2 | 18.7 | 2.2 | -3.9 |
| Year Lowest Occurred | 1977 | 1979 | 1996 | 1975 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1995 | 1976 | 1977 |
| Mean Min. Temperature (F) | -3.6 | -0.2 | 12.1 | 26.4 | 39.9 | 49.7 | 55.0 | 52.8 | 43.7 | 32.4 | 19.3 | 4.3 | 27.7 |
| Highest Mean Min. Temperature (F) | 9.7 | 18.9 | 22.1 | 32.0 | 47.7 | 55.0 | 59.5 | 59.2 | 48.7 | 38.7 | 25.7 | 15.6 | 59.5 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1991 | 1991 | 1995 | 1999 | 1995 | 1996 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -15.6 | -11.0 | 2.5 | 18.9 | 33.6 | 43.2 | 49.4 | 46.9 | 37.4 | 26.5 | 9.4 | -9.2 | -15.6 |
| Year Lowest Occurred | 1977 | 1974 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1976 | 1976 | 1995 | 1976 | 1977 |
| Mean Precipitation (in.) | 1.31 | 0.89 | 1.66 | 2.21 | 3.43 | 3.69 | 3.91 | 4.33 | 4.08 | 2.65 | 2.13 | 1.32 | 31.61 |
| Highest Precipitation (in.) | 3.12 | 2.19 | 3.71 | 4.51 | 9.68 | 9.45 | 7.74 | 8.74 | 7.44 | 4.91 | 4.76 | 2.60 | 9.68 |
| Year Highest Occurred | 1997 | 2000 | 1973 | 1977 | 1999 | 1981 | 2000 | 1978 | 1980 | 1990 | 1975 | 1984 | 1999 |
| Lowest Precipitation (in.) | 0.22 | 0.07 | 0.20 | 0.68 | 0.21 | 1.73 | 1.08 | 1.42 | 0.89 | 0.54 | 0.26 | 0.08 | 0.07 |
| Year Lowest Occurred | 1981 | 1987 | 1978 | 1997 | 1986 | 1982 | 1989 | 2000 | 1976 | 1976 | 1981 | 1994 | 1987 |
| Heating Degree Days (F) | 1791. | 1486. | 1288. | 815. | 419. | 173. | 80. | 126. | 348. | 706. | 1121. | 1595. | 9948. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 19. | 36. | 76. | 54. | 5. | 0. | 0. | 0. | 190. |