| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.0 | 27.1 | 37.3 | 52.1 | 65.8 | 74.4 | 79.0 | 77.2 | 67.7 | 55.9 | 37.6 | 24.2 | 51.5 |
| Highest Mean Max. Temperature (F) | 30.0 | 40.0 | 46.4 | 66.7 | 76.2 | 84.0 | 89.6 | 82.8 | 73.0 | 61.2 | 48.6 | 32.3 | 89.6 |
| Year Highest Occurred | 1989 | 1987 | 2000 | 1987 | 1988 | 1988 | 1988 | 1983 | 1998 | 1973 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 4.0 | 17.1 | 27.5 | 42.0 | 56.1 | 66.6 | 71.0 | 71.9 | 60.6 | 51.0 | 29.1 | 13.0 | 4.0 |
| Year Lowest Occurred | 1982 | 1982 | 1982 | 1982 | 1982 | 1993 | 1982 | 1992 | 1993 | 1980 | 1995 | 2000 | 1982 |
| Mean Temperature (F) | 8.4 | 15.2 | 26.5 | 39.5 | 51.0 | 59.8 | 65.9 | 64.5 | 55.7 | 44.4 | 28.6 | 14.1 | 39.5 |
| Highest Mean Temperature (F) | 17.9 | 30.5 | 34.7 | 46.0 | 56.5 | 63.4 | 71.8 | 69.1 | 59.8 | 50.8 | 37.4 | 23.6 | 71.8 |
| Year Highest Occurred | 1987 | 1998 | 2000 | 1987 | 1977 | 1976 | 1988 | 1983 | 1998 | 1973 | 1999 | 1997 | 1988 |
| Lowest Mean Temperature (F) | -7.7 | 1.3 | 17.5 | 33.1 | 45.5 | 54.5 | 60.4 | 59.6 | 50.4 | 38.5 | 20.7 | 1.9 | -7.7 |
| Year Lowest Occurred | 1982 | 1989 | 1982 | 1975 | 1997 | 1982 | 1992 | 1985 | 1993 | 1976 | 1985 | 1983 | 1982 |
| Mean Min. Temperature (F) | -3.3 | 3.3 | 15.6 | 26.8 | 36.1 | 45.2 | 52.8 | 51.7 | 43.6 | 32.8 | 19.6 | 3.9 | 27.3 |
| Highest Mean Min. Temperature (F) | 6.4 | 22.3 | 24.9 | 32.2 | 42.0 | 48.8 | 58.2 | 56.2 | 48.3 | 40.3 | 26.1 | 15.4 | 58.2 |
| Year Highest Occurred | 1998 | 1998 | 1973 | 1997 | 1977 | 1976 | 1975 | 1995 | 1994 | 1973 | 1999 | 1997 | 1975 |
| Lowest Mean Min. Temperature (F) | -19.5 | -15.7 | 6.9 | 20.2 | 30.4 | 38.7 | 47.8 | 46.1 | 37.5 | 25.3 | 10.0 | -10.4 | -19.5 |
| Year Lowest Occurred | 1982 | 1989 | 1989 | 1988 | 1988 | 1985 | 1985 | 1985 | 1984 | 1987 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 0.96 | 0.70 | 1.50 | 2.04 | 3.09 | 4.28 | 4.47 | 4.26 | 3.88 | 2.50 | 2.12 | 0.87 | 30.67 |
| Highest Precipitation (in.) | 2.56 | 2.24 | 3.47 | 5.35 | 6.24 | 7.24 | 10.97 | 7.84 | 8.35 | 8.25 | 5.64 | 2.77 | 10.97 |
| Year Highest Occurred | 1975 | 1981 | 1977 | 1986 | 1993 | 1984 | 1999 | 1974 | 1986 | 1971 | 1991 | 1982 | 1999 |
| Lowest Precipitation (in.) | 0.10 | 0.05 | 0.34 | 0.20 | 0.30 | 1.25 | 1.52 | 1.18 | 0.87 | 0.50 | 0.27 | 0.03 | 0.03 |
| Year Lowest Occurred | 1981 | 1988 | 1996 | 1997 | 1976 | 1983 | 1975 | 1982 | 2000 | 1976 | 1976 | 1999 | 1999 |
| Heating Degree Days (F) | 1758. | 1394. | 1196. | 767. | 439. | 178. | 80. | 91. | 285. | 640. | 1092. | 1579. | 9499. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 3. | 20. | 108. | 72. | 5. | 0. | 0. | 0. | 208. |