‹ Grand Canyon weather by month
Typical August weather
Grand Canyon
Arizona · August
82° days
50° nights
about 5 rainy days · 13½ hours of daylight
What to pack
- Light jacket
- Sunscreen
- Layers
What August feels like
August brings the wettest afternoons of the year up top and the light after a storm clears is the reason photographers come now. Runoff turns side canyons into flash-flood channels within minutes; the mule strings and the rangers both give them a wide berth, and so should you.
Expect about 5 days with real rain — enough to notice, not enough to plan around.
The numbers
| Typical high | 82° |
|---|---|
| Typical low | 50° |
| Days with real rain | 5 |
| Total rain | 2.2 in |
| Sunrise / sunset (mid-month) | 5:47 am / 7:18 pm |