Indiana Dunes National Park in August
In August, Indiana Dunes National Park averages a high of 80°F and a low of 63°F, with 4.1 inches of precipitation (rain plus melted snow). About 403,000 people visit, the 3rd busiest of 12 (very busy). Days are 13 hours 51 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 80° / 63°F
- Precipitation
- 4.1in
- Snow
- 0in
- Daylight
- 13h 51m
- Visitors
- 403,000
- Crowds
- Very busy
Best months for weather and crowds instead: April (moderate).
Weather 1991–2020 averages at Indiana Dunes Nl, IN, 3.4 miles from the park's center, 680 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in August
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Sleeping Bear Dunes National Lakeshore | 75° / 59° | Very busy | Mild |
| Gateway Arch National Park | 88° / 66° | Busy | Hot |
| Cuyahoga Valley National Park | 81° / 59° | Very busy | Hot |
| Mammoth Cave National Park | 90° / 67° | Busy | Very hot |
| Ozark National Scenic Riverways | 88° / 63° | Very busy | Hot |
Closures, reservations and alerts: Indiana Dunes National Park on nps.gov
All twelve months at Indiana Dunes · National parks to visit in August