| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 24.1 | 30.9 | 42.4 | 58.0 | 70.5 | 79.1 | 83.0 | 80.5 | 71.9 | 59.9 | 42.0 | 28.6 | 55.9 |
| Highest Mean Max. Temperature (F) | 35.1 | 39.9 | 51.2 | 67.3 | 79.4 | 85.5 | 87.7 | 86.3 | 78.8 | 66.8 | 52.9 | 37.4 | 87.7 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1977 | 1988 | 1988 | 1983 | 1978 | 1973 | 1999 | 1998 | 1988 |
| Lowest Mean Max. Temperature (F) | 12.2 | 22.7 | 35.2 | 50.7 | 64.2 | 74.1 | 75.8 | 76.4 | 64.9 | 54.9 | 34.1 | 16.5 | 12.2 |
| Year Lowest Occurred | 1977 | 1979 | 1975 | 1975 | 1983 | 1982 | 1992 | 1997 | 1993 | 1987 | 1991 | 1983 | 1977 |
| Mean Temperature (F) | 15.1 | 21.6 | 33.4 | 47.7 | 59.8 | 68.6 | 72.8 | 70.3 | 61.7 | 49.9 | 34.4 | 21.0 | 46.4 |
| Highest Mean Temperature (F) | 26.7 | 33.0 | 41.6 | 55.6 | 67.9 | 72.9 | 77.7 | 76.2 | 67.4 | 56.8 | 43.3 | 29.1 | 77.7 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1971 | 1999 | 1995 | 1978 | 1971 | 1999 | 1998 | 1999 |
| Lowest Mean Temperature (F) | 3.0 | 9.7 | 25.5 | 41.4 | 53.4 | 63.6 | 67.0 | 65.8 | 56.1 | 44.5 | 27.0 | 7.7 | 3.0 |
| Year Lowest Occurred | 1979 | 1978 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1990 | 1991 | 1983 | 1979 |
| Mean Min. Temperature (F) | 6.0 | 12.2 | 24.4 | 37.4 | 49.0 | 58.1 | 62.5 | 60.0 | 51.5 | 39.9 | 26.8 | 13.4 | 36.8 |
| Highest Mean Min. Temperature (F) | 18.2 | 26.9 | 33.5 | 44.0 | 56.5 | 62.6 | 68.2 | 67.4 | 55.9 | 47.7 | 33.6 | 22.5 | 68.2 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1999 | 1995 | 1978 | 1971 | 1999 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -7.0 | -3.8 | 15.7 | 32.2 | 42.1 | 53.0 | 57.3 | 55.0 | 45.6 | 31.7 | 19.1 | -1.0 | -7.0 |
| Year Lowest Occurred | 1979 | 1978 | 1978 | 1975 | 1997 | 1982 | 1984 | 1992 | 1974 | 1990 | 1976 | 1983 | 1979 |
| Mean Precipitation (in.) | 1.07 | 0.89 | 1.95 | 3.20 | 3.72 | 3.81 | 4.30 | 4.54 | 3.84 | 2.36 | 2.16 | 1.08 | 32.92 |
| Highest Precipitation (in.) | 3.74 | 3.15 | 4.00 | 7.13 | 6.17 | 7.77 | 12.64 | 9.31 | 13.13 | 5.62 | 6.73 | 3.17 | 13.13 |
| Year Highest Occurred | 1996 | 1981 | 1976 | 1993 | 1983 | 1998 | 1978 | 1980 | 1980 | 1982 | 1991 | 1982 | 1980 |
| Lowest Precipitation (in.) | 0.10 | 0.00 | 0.26 | 0.70 | 1.09 | 1.00 | 1.19 | 0.77 | 0.18 | 0.34 | 0.00 | 0.13 | 0.00 |
| Year Lowest Occurred | 1981 | 1987 | 1994 | 1997 | 1985 | 1989 | 1974 | 1976 | 1998 | 1975 | 1976 | 1998 | 1987 |
| Heating Degree Days (F) | 1549. | 1216. | 978. | 523. | 216. | 34. | 11. | 20. | 141. | 472. | 919. | 1364. | 7443. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 4. | 52. | 143. | 251. | 183. | 43. | 3. | 0. | 0. | 679. |