9 National Parks That Escape the August Crowds
These parks run at 60% of their peak or less in August with average highs of 92°F or below — the data-verified escapes from peak-summer crush, ranked quietest first (NPS visitation 2021–2025 + NOAA normals).
| Park | August vs peak | August high | Verdict |
|---|---|---|---|
| National Park of American Samoa | 24% | 85°F | Best window |
| Guadalupe Mountains National Park | 28% | 84°F | Best window |
| Gateway Arch National Park | 46% | 88°F | Shoulder |
| Congaree National Park | 47% | 91°F | Shoulder |
| Virgin Islands National Park | 49% | 90°F | Best window |
| Capitol Reef National Park | 51% | 88°F | Shoulder |
| Canyonlands National Park | 52% | 92°F | Shoulder |
| Lassen Volcanic National Park | 56% | 78°F | Best window |
| Shenandoah National Park | 56% | 83°F | Shoulder |
NPS Visitor Use Statistics 2021–2025; NOAA 1991–2020 normals. Methodology.
How to choose among them
If heat is the worry, Lassen Volcanic is the coolest here, with average August highs of 78°F. American Samoa, Guadalupe Mountains, Virgin Islands and Lassen Volcanic are rated a best window for August by the same score used across the site; the others are shoulder months there.
The percentage compares each park with its own busiest month, not with other parks, so a quiet month at a big park can still be busier than a small park at its peak. In August, Gateway Arch averages 217,260 visits and American Samoa 734. Each park's August page has the weather, what to pack and the park service's notes.
Last verified 2026-09-24 · See also the full August ranking and September's ranking.
Plan your gear after choosing a park
Check the park's weather and trail conditions before choosing sizes or equipment. These options are starting points for comparison; none is required for every visit.
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