| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 14.0 | 22.6 | 34.7 | 49.4 | 65.2 | 72.8 | 77.6 | 75.1 | 63.8 | 50.4 | 32.4 | 18.5 | 48.0 |
| Highest Mean Max. Temperature (F) | 24.8 | 33.8 | 43.9 | 62.9 | 74.1 | 80.5 | 83.3 | 81.1 | 71.7 | 56.1 | 43.0 | 27.4 | 83.3 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1988 | 1984 | 1998 | 1973 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 2.3 | 13.9 | 27.6 | 41.6 | 55.7 | 66.6 | 69.7 | 67.5 | 57.9 | 45.2 | 24.1 | 7.2 | 2.3 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1995 | 1979 | 1982 | 1992 | 1977 | 1974 | 1991 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 2.7 | 10.1 | 22.6 | 37.9 | 53.3 | 61.9 | 67.0 | 64.6 | 53.9 | 41.8 | 24.9 | 9.3 | 37.5 |
| Highest Mean Temperature (F) | 11.7 | 24.8 | 32.0 | 45.8 | 61.6 | 66.9 | 71.9 | 69.4 | 59.5 | 48.0 | 33.9 | 20.2 | 71.9 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1987 | 1977 | 1988 | 1983 | 1984 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -9.1 | -1.0 | 15.0 | 31.5 | 46.8 | 56.2 | 59.7 | 58.9 | 48.5 | 36.9 | 17.0 | -3.3 | -9.1 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1996 | 1997 | 1982 | 1992 | 1977 | 1974 | 1976 | 1985 | 1983 | 1994 |
| Mean Min. Temperature (F) | -8.7 | -2.4 | 10.5 | 26.3 | 41.4 | 50.9 | 56.4 | 54.1 | 43.9 | 33.1 | 17.4 | 0.1 | 26.9 |
| Highest Mean Min. Temperature (F) | 1.2 | 15.7 | 21.9 | 31.4 | 49.1 | 55.1 | 61.5 | 57.9 | 48.0 | 39.8 | 25.4 | 13.9 | 61.5 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1986 | 1977 | 1995 | 1983 | 1983 | 1978 | 1973 | 1981 | 1997 | 1983 |
| Lowest Mean Min. Temperature (F) | -22.6 | -15.9 | 2.4 | 21.0 | 35.4 | 45.7 | 49.6 | 49.5 | 38.7 | 27.3 | 9.0 | -13.9 | -22.6 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1982 | 1983 | 1985 | 1992 | 1982 | 1993 | 1988 | 1985 | 1989 | 1982 |
| Mean Precipitation (in.) | 1.06 | 0.76 | 1.24 | 1.58 | 2.87 | 4.19 | 3.72 | 3.84 | 3.63 | 2.40 | 1.66 | 0.99 | 27.94 |
| Highest Precipitation (in.) | 3.57 | 1.82 | 3.12 | 4.70 | 5.11 | 9.09 | 6.92 | 12.15 | 6.44 | 6.45 | 3.26 | 1.87 | 12.15 |
| Year Highest Occurred | 1975 | 1981 | 1979 | 1990 | 1999 | 1990 | 1993 | 1988 | 1980 | 1973 | 2000 | 1996 | 1988 |
| Lowest Precipitation (in.) | 0.12 | 0.22 | 0.35 | 0.16 | 0.40 | 0.81 | 0.60 | 0.63 | 0.76 | 0.77 | 0.26 | 0.34 | 0.12 |
| Year Lowest Occurred | 1981 | 1973 | 1983 | 1988 | 1976 | 1995 | 1989 | 1991 | 1976 | 1992 | 1999 | 1994 | 1981 |
| Heating Degree Days (F) | 1934. | 1540. | 1316. | 814. | 381. | 137. | 54. | 98. | 339. | 721. | 1204. | 1726. | 10264. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 18. | 42. | 115. | 87. | 4. | 0. | 0. | 0. | 266. |