| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 10.8 | 18.3 | 31.0 | 50.8 | 66.7 | 74.4 | 79.0 | 78.8 | 67.3 | 53.0 | 31.1 | 16.2 | 48.1 |
| Highest Mean Max. Temperature (F) | 25.8 | 31.6 | 42.6 | 63.9 | 76.2 | 87.9 | 87.5 | 86.2 | 74.9 | 57.8 | 46.0 | 30.5 | 87.9 |
| Year Highest Occurred | 1990 | 2000 | 2000 | 1980 | 1977 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1999 | 1988 |
| Lowest Mean Max. Temperature (F) | -3.8 | 1.9 | 21.0 | 35.9 | 56.3 | 66.9 | 71.0 | 72.0 | 59.8 | 46.6 | 17.9 | 2.1 | -3.8 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1974 | 1985 | 1993 | 1977 | 1985 | 1991 | 1996 | 1983 | 1982 |
| Mean Temperature (F) | 0.7 | 8.1 | 21.6 | 39.3 | 53.7 | 62.2 | 66.5 | 65.2 | 54.5 | 41.3 | 21.9 | 6.9 | 36.8 |
| Highest Mean Temperature (F) | 14.6 | 23.7 | 32.7 | 48.4 | 63.0 | 71.9 | 72.3 | 71.3 | 60.0 | 46.6 | 33.7 | 22.4 | 72.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1989 | 1983 | 1998 | 1973 | 1999 | 1997 | 1989 |
| Lowest Mean Temperature (F) | -14.5 | -7.9 | 12.3 | 28.8 | 46.1 | 56.1 | 59.1 | 58.7 | 49.9 | 36.0 | 8.6 | -6.2 | -14.5 |
| Year Lowest Occurred | 1982 | 1979 | 1996 | 1979 | 1979 | 1985 | 1992 | 1977 | 1985 | 1976 | 1996 | 1983 | 1982 |
| Mean Min. Temperature (F) | -9.5 | -2.1 | 12.2 | 27.7 | 40.6 | 49.9 | 53.9 | 51.6 | 41.7 | 29.5 | 12.7 | -2.5 | 25.5 |
| Highest Mean Min. Temperature (F) | 3.3 | 17.8 | 23.8 | 34.8 | 49.8 | 56.1 | 57.7 | 56.3 | 46.2 | 36.3 | 22.1 | 15.6 | 57.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1998 | 1977 | 1995 | 1983 | 1983 | 1978 | 1994 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -25.2 | -17.7 | 2.1 | 21.6 | 34.0 | 44.1 | 46.4 | 45.3 | 36.3 | 22.5 | -0.8 | -14.6 | -25.2 |
| Year Lowest Occurred | 1982 | 1979 | 1974 | 1979 | 1983 | 1982 | 1992 | 1977 | 1974 | 1976 | 1996 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.50 | 0.40 | 0.65 | 1.02 | 2.15 | 3.21 | 3.32 | 2.59 | 1.71 | 1.39 | 0.74 | 0.48 | 18.16 |
| Highest Precipitation (in.) | 1.59 | 1.30 | 1.56 | 3.45 | 6.13 | 7.79 | 10.41 | 6.56 | 3.59 | 4.88 | 2.47 | 1.33 | 10.41 |
| Year Highest Occurred | 1998 | 1987 | 1983 | 1997 | 1974 | 1993 | 1993 | 1980 | 1983 | 1997 | 2000 | 2000 | 1993 |
| Lowest Precipitation (in.) | 0.01 | 0.00 | 0.08 | 0.00 | 0.28 | 0.59 | 0.10 | 0.49 | 0.32 | 0.00 | 0.00 | 0.08 | 0.00 |
| Year Lowest Occurred | 1973 | 1993 | 1986 | 1988 | 1984 | 1988 | 1985 | 1998 | 1979 | 1993 | 1976 | 1979 | 1993 |
| Heating Degree Days (F) | 1998. | 1595. | 1345. | 773. | 371. | 147. | 70. | 98. | 325. | 736. | 1293. | 1805. | 10556. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 1. | 19. | 60. | 115. | 105. | 10. | 0. | 0. | 0. | 310. |