| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 10.9 | 18.9 | 32.2 | 51.2 | 67.1 | 75.1 | 79.4 | 78.5 | 67.2 | 52.8 | 31.7 | 16.2 | 48.4 |
| Highest Mean Max. Temperature (F) | 25.2 | 29.6 | 43.2 | 62.9 | 77.3 | 86.0 | 86.1 | 85.4 | 74.1 | 57.6 | 44.8 | 27.5 | 86.1 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1999 | 1989 |
| Lowest Mean Max. Temperature (F) | -1.6 | 4.6 | 22.9 | 40.0 | 56.8 | 68.9 | 71.4 | 71.6 | 60.9 | 48.0 | 22.2 | 3.1 | -1.6 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1985 | 1992 | 1977 | 1993 | 1991 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 0.6 | 8.5 | 22.9 | 40.3 | 55.0 | 63.3 | 67.4 | 65.7 | 55.3 | 42.9 | 24.1 | 7.7 | 37.8 |
| Highest Mean Temperature (F) | 14.9 | 23.5 | 32.9 | 49.4 | 65.2 | 72.6 | 73.1 | 72.3 | 60.9 | 48.1 | 33.7 | 20.8 | 73.1 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -13.4 | -4.8 | 12.8 | 32.0 | 47.8 | 57.5 | 60.7 | 58.9 | 49.6 | 38.1 | 14.1 | -4.6 | -13.4 |
| Year Lowest Occurred | 1979 | 1979 | 1996 | 1996 | 1979 | 1982 | 1992 | 1977 | 1993 | 1991 | 1996 | 1983 | 1979 |
| Mean Min. Temperature (F) | -9.8 | -1.9 | 13.6 | 29.4 | 42.9 | 51.4 | 55.4 | 52.9 | 43.4 | 32.9 | 16.5 | -0.9 | 27.2 |
| Highest Mean Min. Temperature (F) | 4.5 | 17.3 | 24.4 | 35.8 | 53.1 | 59.1 | 61.7 | 59.2 | 47.6 | 38.6 | 25.0 | 14.2 | 61.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -25.4 | -16.5 | 2.6 | 23.4 | 36.0 | 45.3 | 49.4 | 46.2 | 36.4 | 27.3 | 5.7 | -12.3 | -25.4 |
| Year Lowest Occurred | 1979 | 1989 | 1996 | 1996 | 1973 | 1982 | 1971 | 1977 | 1974 | 1993 | 1996 | 1983 | 1979 |
| Mean Precipitation (in.) | 0.53 | 0.34 | 0.66 | 1.11 | 2.11 | 3.45 | 3.28 | 2.10 | 2.16 | 1.49 | 0.83 | 0.50 | 18.56 |
| Highest Precipitation (in.) | 1.94 | 1.51 | 1.33 | 2.89 | 6.24 | 7.20 | 8.55 | 6.27 | 6.78 | 3.91 | 2.83 | 1.19 | 8.55 |
| Year Highest Occurred | 1989 | 1987 | 1995 | 1986 | 1977 | 1981 | 1991 | 1974 | 1991 | 1982 | 1977 | 1988 | 1991 |
| Lowest Precipitation (in.) | 0.04 | 0.00 | 0.03 | 0.00 | 0.34 | 1.00 | 0.28 | 0.87 | 0.23 | 0.14 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1978 | 1988 | 1978 | 1988 | 1980 | 1988 | 1989 | 1972 | 1976 | 1992 | 1976 | 1979 | 1988 |
| Heating Degree Days (F) | 1999. | 1584. | 1306. | 742. | 339. | 131. | 63. | 96. | 302. | 687. | 1228. | 1779. | 10256. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 29. | 79. | 138. | 117. | 11. | 0. | 0. | 0. | 375. |