| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 33.3 | 39.9 | 47.8 | 56.1 | 64.9 | 72.7 | 81.7 | 81.2 | 72.4 | 60.3 | 42.5 | 33.5 | 57.2 |
| Highest Mean Max. Temperature (F) | 39.2 | 47.7 | 57.6 | 64.9 | 74.0 | 80.2 | 87.7 | 87.0 | 79.6 | 70.6 | 51.3 | 38.8 | 87.7 |
| Year Highest Occurred | 1994 | 1991 | 1992 | 1987 | 1992 | 1986 | 1985 | 1971 | 1990 | 1988 | 1976 | 1979 | 1985 |
| Lowest Mean Max. Temperature (F) | 23.1 | 30.6 | 41.9 | 47.1 | 57.8 | 67.9 | 71.0 | 71.9 | 63.4 | 53.4 | 33.3 | 24.5 | 23.1 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1977 | 1991 | 1993 | 1976 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Temperature (F) | 22.7 | 27.5 | 35.3 | 42.5 | 50.1 | 56.7 | 63.2 | 63.0 | 55.3 | 45.3 | 32.9 | 24.2 | 43.2 |
| Highest Mean Temperature (F) | 29.9 | 35.8 | 42.5 | 47.9 | 55.4 | 61.9 | 68.0 | 67.5 | 61.1 | 51.8 | 39.7 | 30.4 | 68.0 |
| Year Highest Occurred | 1981 | 1992 | 1992 | 1987 | 1993 | 1986 | 1998 | 1971 | 1998 | 1988 | 1976 | 1977 | 1998 |
| Lowest Mean Temperature (F) | 10.6 | 14.5 | 28.3 | 34.1 | 45.6 | 53.0 | 54.9 | 58.2 | 49.2 | 41.1 | 23.1 | 13.3 | 10.6 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1975 | 1977 | 1991 | 1993 | 1980 | 1985 | 1984 | 1985 | 1985 | 1979 |
| Mean Min. Temperature (F) | 12.0 | 15.1 | 22.7 | 28.9 | 35.3 | 40.6 | 44.7 | 44.7 | 38.1 | 30.3 | 23.3 | 14.8 | 29.2 |
| Highest Mean Min. Temperature (F) | 22.6 | 24.4 | 28.1 | 32.9 | 39.7 | 44.7 | 50.4 | 48.4 | 45.4 | 34.1 | 29.6 | 23.4 | 50.4 |
| Year Highest Occurred | 1981 | 1992 | 1983 | 1994 | 1993 | 1992 | 1998 | 1983 | 1998 | 1975 | 1999 | 1977 | 1998 |
| Lowest Mean Min. Temperature (F) | -2.0 | -1.6 | 13.2 | 21.2 | 32.1 | 37.8 | 38.7 | 39.6 | 33.5 | 25.5 | 12.9 | 2.1 | -2.0 |
| Year Lowest Occurred | 1979 | 1989 | 1985 | 1975 | 1999 | 1976 | 1993 | 1980 | 1974 | 1974 | 1985 | 1985 | 1979 |
| Mean Precipitation (in.) | 1.86 | 1.38 | 1.58 | 1.26 | 1.74 | 1.67 | 0.85 | 0.95 | 0.81 | 0.93 | 1.86 | 1.95 | 16.84 |
| Highest Precipitation (in.) | 5.34 | 2.75 | 3.13 | 3.10 | 5.34 | 3.61 | 2.85 | 4.08 | 2.44 | 2.29 | 4.76 | 5.07 | 5.34 |
| Year Highest Occurred | 1971 | 1986 | 1995 | 1978 | 1998 | 1980 | 1982 | 1989 | 1976 | 1975 | 1973 | 1973 | 1971 |
| Lowest Precipitation (in.) | 0.21 | 0.39 | 0.27 | 0.21 | 0.32 | 0.05 | 0.01 | 0.02 | 0.00 | 0.00 | 0.39 | 0.04 | 0.00 |
| Year Lowest Occurred | 1989 | 1973 | 1973 | 1977 | 1976 | 1986 | 1973 | 1998 | 1999 | 1987 | 1999 | 1985 | 1999 |
| Heating Degree Days (F) | 1312. | 1051. | 924. | 676. | 462. | 260. | 112. | 124. | 305. | 611. | 963. | 1268. | 8068. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 9. | 56. | 61. | 12. | 0. | 0. | 0. | 138. |