Weather information for the Chelan area is provided below. Average temperatures, climate details and current forecasts are included.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 33 | 40 | 51 | 61 | 70 | 77 | 84 | 85 | 75 | 61 | 44 | 34 |
| Avg. Low | 22 | 26 | 33 | 40 | 48 | 56 | 61 | 60 | 51 | 40 | 32 | 24 |
| Avg. Precip. | 1.5 | 1.2 | 0.9 | 0.7 | 0.8 | 0.8 | 0.3 | 0.4 | 0.4 | 0.5 | 1.6 | 1.7 |



