| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Average Max. Temperature (F) | 42.8 | 41.3 | 42.0 | 48.6 | 58.6 | 67.8 | 75.7 | 76.5 | 68.4 | 59.8 | 46.8 | 42.5 | 56.1 |
| Average Min. Temperature (F) | 26.4 | 25.0 | 25.3 | 30.0 | 36.8 | 43.6 | 52.5 | 52.4 | 46.4 | 40.2 | 30.0 | 26.3 | 36.4 |
| Average Total Precipitation (in.) | 8.38 | 8.23 | 5.10 | 3.90 | 0.93 | 0.08 | 0.31 | 0.48 | 1.08 | 0.85 | 5.67 | 5.42 | 40.42 |