| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Average Max. Temperature (F) | 37.2 | 38.7 | 40.8 | 45.4 | 54.0 | 63.7 | 73.3 | 72.8 | 67.0 | 57.9 | 42.6 | 38.2 | 52.8 |
| Average Min. Temperature (F) | 17.9 | 17.9 | 19.3 | 24.0 | 30.6 | 37.5 | 43.0 | 42.7 | 38.3 | 32.7 | 23.9 | 18.6 | 29.0 |
| Average Total Precipitation (in.) | 12.48 | 9.35 | 7.44 | 5.90 | 2.40 | 1.22 | 0.24 | 1.20 | 0.83 | 4.82 | 8.23 | 7.93 | 62.03 |