National Park of American Samoa in September
September at National Park of American Samoa averages a daytime high near 86°F and an overnight low around 78°F, with about 8" of precipitation. Visitation runs about 1× the park's average month, which makes September an average month here.
- Average low
- 78°F
- Average high
- 86°F
Range across the year: 77°F to 88°F
- Precipitation
- 8.0 in
- Daylight
- 11.9 hours
Roughly 9% of the park's yearly visitors come in September: roughly 2,300 recreation visits in a typical year, based on National Park Service monthly counts from 2002 to 2025.
That makes September the 5th-busiest of the park's twelve months, sitting between the October peak (1.5×) and the June low (0.7×).
On our Best Time to Visit score September rates 47/100 ("Fair"). Our recommended month is June: the lightest crowds of the park's good-weather months.
The daily average of about 82°F is warm enough that midday heat is worth planning around. These figures are 1991–2020 NOAA climate normals from the nearest station, about 58.2 miles from the park.
Because June, July and August together draw about 19% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 11.9 hours of daylight in September to explore — between the 11.2-hour midwinter low and the 12.8-hour summer high.
Park-wide, 2024 drew 22,567 recreation visits, up 86% from 12,135 in 2023.
Across the past decade overall visitation has eased about 30.2%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 85°F / 77°F | 0.8× Quiet | 61 Good |
| September | 86°F / 78°F | 1.0× Average | 47 Fair |
| October | 86°F / 78°F | 1.5× Busy | 23 Poor |
All twelve months at National Park of American Samoa, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 86°F and an overnight low around 78°F at National Park of American Samoa, with about 8 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 58.2 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at National Park of American Samoa (about 1.0× the average month). Our best-time score rates it "Fair" at 47/100. Our recommended month is June.
The busiest month is October and the quietest is June. September sits at about 1.0× the park's average, or 9% of annual visitation.
A typical September sees about 2,000 recreation visits at National Park of American Samoa, based on National Park Service monthly counts from 2002–2025.
Where to stay near National Park of American Samoa in September
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Top-rated places to stay near National Park of American Samoa
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (2002–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.