| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Average Max. Temperature (F) | 37.7 | 39.3 | 46.4 | 56.1 | 66.2 | 75.4 | 81.0 | 80.4 | 73.4 | 63.7 | 51.1 | 42.4 | 59.6 |
| Average Min. Temperature (F) | 23.4 | 24.9 | 32.0 | 40.4 | 50.0 | 58.9 | 65.5 | 64.8 | 57.6 | 48.0 | 37.4 | 28.5 | 44.5 |
| Average Total Precipitation (in.) | 4.40 | 3.93 | 4.39 | 3.89 | 3.80 | 3.44 | 3.32 | 3.81 | 3.64 | 3.67 | 4.39 | 4.81 | 47.50 |