Yellowstone National Park in August
In August, Yellowstone National Park averages a high of 71°F and a low of 37°F, with 1.3 inches of precipitation (rain plus melted snow). About 866,000 people visit, the 3rd busiest of 12 (very busy). Days are 14 hours 03 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 71° / 37°F
- Precipitation
- 1.3in
- Snow
- –in
- Daylight
- 14h 3m
- Visitors
- 866,000
- Crowds
- Very busy
August is one of the best months to visit: mild weather with very busy crowds.
Higher or lower in the park, expect a different picture: Gardiner, MT at 5,275 ft averages a August high of 86°F and a low of 52°F.
Weather 1991–2020 averages at Yellowstone Lake, WY, 4.3 miles from the park's center, 7,835 ft. Second station lower down: Gardiner, MT, 5,275 ft, 32.7 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in August
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| John D. Rockefeller, Jr., Memorial Parkway | 76° / 35° | Very busy | Mild |
| Grand Teton National Park | 76° / 40° | Very busy | Mild |
| Glacier National Park | 79° / 48° | Very busy | Mild |
| Mount Rushmore National Memorial | 78° / 58° | Busy | Mild, wet |
| Wind Cave National Park | 84° / 55° | Very busy | Hot |
Closures, reservations and alerts: Yellowstone National Park on nps.gov
All twelve months at Yellowstone · National parks to visit in August