| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 18.4 | 25.8 | 38.1 | 55.2 | 70.6 | 78.1 | 83.8 | 82.4 | 72.7 | 59.0 | 37.0 | 23.8 | 53.7 |
| Highest Mean Max. Temperature (F) | 35.2 | 36.8 | 48.1 | 66.7 | 79.1 | 90.8 | 92.0 | 90.6 | 79.8 | 65.5 | 53.3 | 36.1 | 92.0 |
| Year Highest Occurred | 1990 | 1991 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1974 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 0.5 | 8.9 | 31.0 | 40.4 | 59.9 | 72.4 | 74.6 | 75.1 | 65.3 | 54.6 | 24.6 | 6.7 | 0.5 |
| Year Lowest Occurred | 1982 | 1979 | 1989 | 1975 | 1979 | 1982 | 1992 | 1980 | 1986 | 1983 | 1985 | 1983 | 1982 |
| Mean Temperature (F) | 8.2 | 15.8 | 27.8 | 42.5 | 56.6 | 64.8 | 69.8 | 68.0 | 58.1 | 45.8 | 27.3 | 14.1 | 41.6 |
| Highest Mean Temperature (F) | 23.9 | 27.9 | 36.4 | 50.9 | 64.9 | 73.9 | 74.1 | 73.8 | 64.4 | 50.9 | 39.4 | 26.7 | 74.1 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -9.8 | -1.5 | 20.4 | 33.7 | 47.7 | 58.6 | 61.5 | 61.7 | 52.9 | 40.6 | 14.6 | -1.0 | -9.8 |
| Year Lowest Occurred | 1982 | 1979 | 1979 | 1979 | 1979 | 1982 | 1992 | 1977 | 1984 | 1991 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -2.1 | 5.8 | 17.4 | 29.7 | 42.5 | 51.5 | 55.8 | 53.5 | 43.5 | 32.6 | 17.5 | 4.4 | 29.3 |
| Highest Mean Min. Temperature (F) | 12.5 | 21.8 | 27.2 | 37.5 | 50.6 | 57.0 | 59.8 | 59.0 | 49.2 | 39.7 | 25.7 | 19.6 | 59.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1998 | 1977 | 1995 | 1999 | 1995 | 1994 | 1994 | 1980 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -20.1 | -12.0 | 9.8 | 25.3 | 35.5 | 44.8 | 48.3 | 47.6 | 37.7 | 25.3 | 4.5 | -8.7 | -20.1 |
| Year Lowest Occurred | 1982 | 1979 | 1979 | 1979 | 1979 | 1982 | 1992 | 1979 | 1984 | 1991 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.57 | 0.58 | 0.82 | 1.29 | 2.20 | 3.32 | 3.13 | 2.51 | 1.98 | 1.39 | 0.63 | 0.42 | 18.84 |
| Highest Precipitation (in.) | 1.67 | 3.94 | 2.17 | 6.01 | 4.78 | 7.33 | 7.31 | 6.14 | 5.43 | 4.73 | 2.92 | 1.28 | 7.33 |
| Year Highest Occurred | 1982 | 1998 | 1998 | 1986 | 1999 | 1990 | 1993 | 1989 | 1973 | 1982 | 1986 | 2000 | 1990 |
| Lowest Precipitation (in.) | 0.06 | 0.04 | 0.00 | 0.00 | 0.43 | 0.69 | 0.29 | 0.34 | 0.10 | 0.04 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1991 | 1978 | 1994 | 1980 | 1997 | 1974 | 1985 | 1976 | 1974 | 1988 | 1999 | 1998 | 1994 |
| Heating Degree Days (F) | 1765. | 1378. | 1155. | 677. | 289. | 101. | 30. | 66. | 235. | 595. | 1133. | 1578. | 9002. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 27. | 95. | 180. | 158. | 27. | 0. | 0. | 0. | 488. |