| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 30.4 | 36.1 | 45.4 | 56.6 | 66.5 | 73.5 | 81.4 | 81.7 | 71.1 | 55.5 | 37.6 | 30.6 | 55.5 |
| Highest Mean Max. Temperature (F) | 35.7 | 41.3 | 57.1 | 63.8 | 74.5 | 80.6 | 91.9 | 89.0 | 81.4 | 63.0 | 42.6 | 36.5 | 91.9 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1987 | 1992 | 1992 | 1985 | 1986 | 1990 | 1987 | 1998 | 1979 | 1985 |
| Lowest Mean Max. Temperature (F) | 18.0 | 28.3 | 38.8 | 49.7 | 59.4 | 66.5 | 70.1 | 74.2 | 63.2 | 49.8 | 28.4 | 22.6 | 18.0 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1972 | 1984 | 1981 | 1993 | 1980 | 1986 | 1995 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 24.6 | 28.7 | 35.2 | 43.1 | 51.8 | 58.1 | 63.5 | 63.1 | 54.1 | 43.0 | 31.6 | 25.4 | 43.5 |
| Highest Mean Temperature (F) | 31.8 | 34.5 | 42.4 | 48.0 | 58.0 | 62.8 | 69.3 | 66.9 | 60.1 | 47.0 | 36.9 | 31.8 | 69.3 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1987 | 1993 | 1992 | 1998 | 1986 | 1990 | 1988 | 1998 | 1979 | 1998 |
| Lowest Mean Temperature (F) | 9.8 | 19.2 | 28.5 | 37.5 | 46.4 | 53.2 | 58.4 | 57.5 | 49.1 | 37.7 | 20.8 | 16.0 | 9.8 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1972 | 1984 | 1981 | 1993 | 1980 | 1984 | 1984 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 18.7 | 21.3 | 24.9 | 29.6 | 37.0 | 42.7 | 45.6 | 44.5 | 37.1 | 30.4 | 25.6 | 20.1 | 31.5 |
| Highest Mean Min. Temperature (F) | 27.9 | 28.4 | 29.6 | 34.7 | 42.3 | 45.2 | 52.7 | 48.2 | 42.8 | 34.8 | 31.1 | 27.1 | 52.7 |
| Year Highest Occurred | 1994 | 1992 | 1983 | 1994 | 1993 | 1982 | 1998 | 1990 | 1997 | 1975 | 1998 | 1979 | 1998 |
| Lowest Mean Min. Temperature (F) | 1.7 | 10.0 | 18.3 | 25.2 | 33.4 | 38.6 | 41.8 | 40.7 | 31.9 | 24.4 | 13.3 | 9.3 | 1.7 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1982 | 1984 | 1976 | 1977 | 1980 | 1984 | 1987 | 1985 | 1983 | 1979 |
| Mean Precipitation (in.) | 3.74 | 3.12 | 2.72 | 2.25 | 2.60 | 2.24 | 1.39 | 1.32 | 1.43 | 1.92 | 4.30 | 4.39 | 31.42 |
| Highest Precipitation (in.) | 8.26 | 6.66 | 5.36 | 4.51 | 7.13 | 4.43 | 4.03 | 3.66 | 3.52 | 4.69 | 10.46 | 8.78 | 10.46 |
| Year Highest Occurred | 1974 | 1999 | 1997 | 1996 | 1998 | 1992 | 1983 | 1976 | 1997 | 1996 | 1973 | 1996 | 1973 |
| Lowest Precipitation (in.) | 0.27 | 0.92 | 0.73 | 0.32 | 0.74 | 0.61 | 0.00 | 0.02 | 0.01 | 0.13 | 1.31 | 0.93 | 0.00 |
| Year Lowest Occurred | 1985 | 1993 | 1992 | 1977 | 1992 | 1973 | 1973 | 1986 | 1990 | 1987 | 1993 | 1985 | 1973 |
| Heating Degree Days (F) | 1254. | 1017. | 926. | 657. | 412. | 219. | 113. | 111. | 337. | 684. | 1002. | 1229. | 7961. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 1. | 12. | 66. | 52. | 10. | 0. | 0. | 0. | 141. |