| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 20.0 | 25.8 | 36.3 | 50.9 | 65.9 | 74.1 | 78.5 | 75.8 | 65.3 | 52.9 | 36.5 | 24.5 | 50.5 |
| Highest Mean Max. Temperature (F) | 29.7 | 36.4 | 44.5 | 59.5 | 75.6 | 81.0 | 83.7 | 80.3 | 73.7 | 58.7 | 46.2 | 31.4 | 83.7 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1987 | 1977 | 1988 | 1983 | 1983 | 1998 | 1973 | 1999 | 1997 | 1983 |
| Lowest Mean Max. Temperature (F) | 11.4 | 19.0 | 29.5 | 43.7 | 56.3 | 68.8 | 71.5 | 71.9 | 60.2 | 47.6 | 29.2 | 14.4 | 11.4 |
| Year Lowest Occurred | 1994 | 1994 | 1984 | 1995 | 1997 | 1982 | 1992 | 1986 | 1974 | 1988 | 1995 | 1983 | 1994 |
| Mean Temperature (F) | 8.6 | 13.5 | 25.0 | 39.3 | 52.8 | 61.3 | 65.9 | 63.8 | 54.3 | 43.2 | 29.2 | 16.0 | 39.4 |
| Highest Mean Temperature (F) | 17.6 | 27.3 | 34.3 | 44.9 | 61.0 | 65.7 | 71.0 | 68.5 | 60.0 | 51.1 | 36.7 | 24.4 | 71.0 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1986 | 1977 | 1987 | 1983 | 1995 | 1998 | 1971 | 1999 | 1997 | 1983 |
| Lowest Mean Temperature (F) | -0.8 | 5.0 | 18.1 | 33.6 | 45.2 | 55.3 | 59.6 | 59.5 | 49.3 | 38.2 | 21.8 | 4.8 | -0.8 |
| Year Lowest Occurred | 1994 | 1979 | 1989 | 1972 | 1997 | 1982 | 1992 | 1986 | 1974 | 1988 | 1995 | 1976 | 1994 |
| Mean Min. Temperature (F) | -2.9 | 1.1 | 13.7 | 27.6 | 39.7 | 48.5 | 53.2 | 51.7 | 43.3 | 33.4 | 21.9 | 7.5 | 28.2 |
| Highest Mean Min. Temperature (F) | 5.8 | 18.2 | 25.2 | 32.9 | 46.4 | 52.5 | 58.3 | 58.4 | 48.2 | 43.5 | 27.8 | 17.4 | 58.4 |
| Year Highest Occurred | 1987 | 1998 | 1973 | 1986 | 1977 | 1995 | 1983 | 1995 | 1978 | 1971 | 1998 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -13.0 | -9.4 | 2.6 | 21.6 | 34.0 | 41.8 | 47.7 | 47.1 | 38.0 | 28.7 | 14.3 | -6.4 | -13.0 |
| Year Lowest Occurred | 1994 | 1979 | 1989 | 1975 | 1997 | 1982 | 1992 | 1992 | 1976 | 1988 | 1995 | 1976 | 1994 |
| Mean Precipitation (in.) | 1.23 | 0.78 | 1.78 | 2.41 | 3.03 | 3.45 | 3.47 | 4.09 | 3.81 | 2.61 | 1.97 | 1.37 | 30.00 |
| Highest Precipitation (in.) | 2.74 | 3.00 | 3.96 | 4.38 | 6.24 | 7.08 | 6.97 | 8.03 | 7.35 | 5.08 | 5.08 | 2.88 | 8.03 |
| Year Highest Occurred | 1996 | 1971 | 1979 | 1977 | 1983 | 1981 | 1999 | 1972 | 1985 | 1995 | 1985 | 1996 | 1972 |
| Lowest Precipitation (in.) | 0.29 | 0.07 | 0.35 | 0.69 | 0.48 | 1.74 | 0.92 | 1.31 | 0.81 | 0.46 | 0.33 | 0.25 | 0.07 |
| Year Lowest Occurred | 1981 | 1982 | 1978 | 1997 | 1986 | 1995 | 1989 | 1991 | 1979 | 1976 | 1981 | 1994 | 1982 |
| Heating Degree Days (F) | 1752. | 1444. | 1240. | 772. | 396. | 148. | 68. | 104. | 325. | 676. | 1074. | 1519. | 9518. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 19. | 37. | 93. | 65. | 4. | 0. | 0. | 0. | 218. |