| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 23.4 | 30.3 | 41.8 | 57.3 | 70.0 | 78.6 | 82.5 | 79.8 | 70.7 | 58.3 | 40.6 | 27.3 | 55.1 |
| Highest Mean Max. Temperature (F) | 35.0 | 40.4 | 50.9 | 66.8 | 78.0 | 84.9 | 87.4 | 85.4 | 78.8 | 64.1 | 49.8 | 37.2 | 87.4 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1987 | 1977 | 1988 | 1988 | 1983 | 1998 | 2000 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 11.0 | 21.5 | 34.3 | 49.5 | 64.6 | 73.5 | 75.5 | 75.7 | 64.1 | 52.4 | 32.9 | 15.0 | 11.0 |
| Year Lowest Occurred | 1979 | 1979 | 1975 | 1975 | 1983 | 1998 | 1992 | 1994 | 1993 | 1976 | 1991 | 1983 | 1979 |
| Mean Temperature (F) | 15.4 | 22.0 | 33.7 | 47.8 | 60.2 | 69.0 | 73.4 | 71.1 | 62.2 | 50.3 | 34.5 | 21.0 | 46.7 |
| Highest Mean Temperature (F) | 27.6 | 34.5 | 41.6 | 55.7 | 69.4 | 73.6 | 77.1 | 76.5 | 68.4 | 56.0 | 41.0 | 30.1 | 77.1 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1977 | 1983 | 1998 | 1971 | 1990 | 1998 | 1977 |
| Lowest Mean Temperature (F) | 2.2 | 10.0 | 26.2 | 41.2 | 55.0 | 64.6 | 67.2 | 66.9 | 56.7 | 44.8 | 27.0 | 7.4 | 2.2 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1991 | 1983 | 1977 |
| Mean Min. Temperature (F) | 7.3 | 13.7 | 25.6 | 38.3 | 50.3 | 59.3 | 64.2 | 62.3 | 53.7 | 42.3 | 28.4 | 14.6 | 38.3 |
| Highest Mean Min. Temperature (F) | 20.2 | 29.0 | 34.2 | 47.2 | 60.9 | 64.7 | 69.8 | 68.2 | 58.2 | 49.5 | 33.5 | 24.8 | 69.8 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1977 | 1995 | 1977 | 1971 | 1998 | 1997 | 1977 |
| Lowest Mean Min. Temperature (F) | -6.6 | -1.5 | 18.0 | 33.0 | 44.7 | 54.1 | 58.9 | 57.7 | 48.2 | 35.8 | 21.0 | -0.3 | -6.6 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1997 | 1982 | 1992 | 1986 | 1974 | 1988 | 1991 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.00 | 0.66 | 1.76 | 3.32 | 3.81 | 4.49 | 5.18 | 4.79 | 4.13 | 2.37 | 2.24 | 0.94 | 34.69 |
| Highest Precipitation (in.) | 2.10 | 2.53 | 3.66 | 8.16 | 7.08 | 10.91 | 12.75 | 9.44 | 10.68 | 6.23 | 8.39 | 2.21 | 12.75 |
| Year Highest Occurred | 1996 | 1998 | 1976 | 1999 | 1991 | 1998 | 1978 | 1998 | 1986 | 1979 | 1991 | 1982 | 1978 |
| Lowest Precipitation (in.) | 0.08 | 0.05 | 0.25 | 0.73 | 0.93 | 1.34 | 0.68 | 0.30 | 0.25 | 0.29 | 0.00 | 0.00 | 0.00 |
| Year Lowest Occurred | 1981 | 1987 | 1994 | 1971 | 1992 | 1983 | 1980 | 1971 | 1979 | 1976 | 1976 | 1989 | 1976 |
| Heating Degree Days (F) | 1539. | 1205. | 970. | 520. | 208. | 32. | 8. | 18. | 131. | 460. | 915. | 1366. | 7372. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 5. | 58. | 151. | 267. | 205. | 47. | 3. | 0. | 0. | 736. |