Grand Canyon National Park in August
In August, Grand Canyon National Park averages a high of 82°F and a low of 50°F, with 2.2 inches of precipitation (rain plus melted snow). About 485,000 people visit, the 4th busiest of 12 (very busy). Days are 13 hours 32 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 82° / 50°F
- Precipitation
- 2.2in
- Snow
- 0in
- Daylight
- 13h 32m
- Visitors
- 485,000
- Crowds
- Very busy
Best months for weather and crowds instead: April (very busy), May (very busy) and October (very busy).
Higher or lower in the park, expect a different picture: Phantom Rch, AZ at 2,530 ft averages a August high of 101°F and a low of 72°F.
Weather 1991–2020 averages at Grand Canyon NP 2, AZ, 19.6 miles from the park's center, 6,785 ft. Second station lower down: Phantom Rch, AZ, 2,530 ft, 18.1 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in August
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Zion National Park | 98° / 69° | Busy | Very hot |
| Bryce Canyon National Park | 78° / 50° | Very busy | Mild, wet |
| Glen Canyon National Recreation Area | 97° / 69° | Busy | Very hot |
| Lake Mead National Recreation Area | 106° / 82° | Very busy | Very hot |
| Capitol Reef National Park | 88° / 63° | Moderate | Hot |
Closures, reservations and alerts: Grand Canyon National Park on nps.gov
All twelve months at Grand Canyon · National parks to visit in August