| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 17.5 | 25.6 | 36.7 | 52.2 | 66.0 | 73.9 | 78.2 | 75.6 | 65.8 | 53.4 | 35.3 | 21.5 | 50.1 |
| Highest Mean Max. Temperature (F) | 28.0 | 38.4 | 44.4 | 64.3 | 75.2 | 81.4 | 85.6 | 81.7 | 72.0 | 58.9 | 44.6 | 31.4 | 85.6 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1988 | 1983 | 1994 | 1975 | 1981 | 1997 | 1988 |
| Lowest Mean Max. Temperature (F) | 7.5 | 16.0 | 29.3 | 44.5 | 58.1 | 67.4 | 71.5 | 71.0 | 59.5 | 48.3 | 27.8 | 8.8 | 7.5 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1975 | 1974 | 2000 | 1992 | 1985 | 1993 | 1980 | 1995 | 2000 | 1994 |
| Mean Temperature (F) | 3.8 | 11.5 | 23.9 | 38.7 | 51.7 | 60.2 | 64.9 | 62.8 | 53.5 | 42.3 | 25.7 | 10.3 | 37.4 |
| Highest Mean Temperature (F) | 15.1 | 28.5 | 33.1 | 45.2 | 59.3 | 66.1 | 68.8 | 67.6 | 60.5 | 48.1 | 33.7 | 22.6 | 68.8 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1987 | 1977 | 1995 | 1983 | 1983 | 1994 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -8.3 | 0.1 | 15.5 | 32.2 | 46.0 | 54.5 | 59.1 | 57.9 | 48.4 | 36.2 | 17.6 | -2.7 | -8.3 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1997 | 1985 | 1992 | 1977 | 1993 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -9.9 | -2.7 | 11.1 | 25.1 | 37.3 | 46.5 | 51.6 | 50.0 | 41.2 | 31.1 | 16.1 | -0.9 | 24.7 |
| Highest Mean Min. Temperature (F) | 6.6 | 18.6 | 21.9 | 30.7 | 43.3 | 51.9 | 55.6 | 55.1 | 48.9 | 37.4 | 23.6 | 13.7 | 55.6 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1999 | 1977 | 1995 | 1983 | 1995 | 1994 | 1994 | 1999 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -25.6 | -15.9 | 1.3 | 19.6 | 31.3 | 39.6 | 46.7 | 44.8 | 35.9 | 22.4 | 7.3 | -16.4 | -25.6 |
| Year Lowest Occurred | 1982 | 1989 | 1980 | 1982 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.89 | 0.59 | 1.03 | 1.94 | 2.62 | 4.45 | 4.89 | 3.56 | 3.23 | 2.35 | 1.63 | 0.76 | 27.94 |
| Highest Precipitation (in.) | 3.13 | 1.59 | 3.42 | 5.70 | 5.89 | 9.51 | 14.14 | 10.52 | 5.94 | 6.37 | 3.89 | 1.75 | 14.14 |
| Year Highest Occurred | 1975 | 1998 | 1979 | 1986 | 1987 | 1984 | 1999 | 1988 | 1986 | 1971 | 1991 | 1983 | 1999 |
| Lowest Precipitation (in.) | 0.11 | 0.01 | 0.23 | 0.34 | 0.24 | 1.18 | 1.66 | 1.03 | 0.62 | 0.85 | 0.26 | 0.12 | 0.01 |
| Year Lowest Occurred | 1991 | 1973 | 1992 | 1988 | 1976 | 1987 | 1984 | 1991 | 1974 | 1987 | 1999 | 1999 | 1973 |
| Heating Degree Days (F) | 1898. | 1501. | 1275. | 791. | 423. | 176. | 74. | 127. | 349. | 705. | 1179. | 1697. | 10195. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 9. | 32. | 70. | 58. | 4. | 0. | 0. | 0. | 173. |