American Samoa in September: Crowds, Weather & What to Pack
Peak crowds · VisitWhen score 44/100 · #11 of 12 months
September is peak season — expect the year's biggest crowds at National Park of American Samoa: crowds run 78% of the April peak (2,435 average visits). Weather: highs average 86°F and lows 78°F, with 8.0″ of precipitation and 12 hours of daylight. Computed from NPS and NOAA data.
Bring for American Samoa in September
- Sun protection and 2L+ water per personSee it on AmazonWhy: highs average 86°F.
- Rain shell + pack coverSee it on AmazonWhy: 8.0″ of precipitation is normal this month.
- Waterproof boots — plus navigation and a basic first-aid kitSee it on AmazonWhy: 8.0″ of rain is normal this month.
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Crowds in September
American Samoa averages 2,435 recreation visits in September — 78% of what April, the peak month, draws. Trailheads and parking fill accordingly — book early and start days at dawn.
Weather & daylight
Days run warm (highs average 86°F), and even nights stay hot (lows average 78°F). This is one of the wetter months (8.0″ of precipitation on average). Mid-month daylight runs 12 hours.
NOAA 1991–2020 monthly normals, station PAGO PAGO WSO AP, AS AQ (6 mi from park coordinates, 12 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for American Samoa in September
Computed from the month's weather normals above — not a generic list.
- Sun protection and 2L+ water per person — highs average 86°F
- Rain shell + pack cover — 8.0″ of precipitation is normal this month
- Waterproof boots — plus navigation and a basic first-aid kit — 8.0″ of rain is normal this month
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If your dates are flexible, consider shifting: The computed best months for American Samoa are June and August.
Also at their best in September
Other parks whose computed September verdict is a best window — same NPS × NOAA formula:
- Wrangell–St. Elias in September — 25% of peak crowds, highs 56°F, score 84/100
- Guadalupe Mountains in September — 35% of peak crowds, highs 80°F, score 81/100
- Gateway Arch in September — 29% of peak crowds, highs 81°F, score 80/100
- Isle Royale in September — 39% of peak crowds, highs 65°F, score 79/100
Common questions
Is American Samoa crowded in September?
Yes — September runs 78% of American Samoa's peak, averaging 2,435 recreation visits (NPS, 2021–2025).
What is the weather like in American Samoa in September?
Average highs of 86°F, lows of 78°F, 8.0″ of precipitation (NOAA 1991–2020 normals, PAGO PAGO WSO AP, AS AQ station).
What should I pack for American Samoa in September?
Sun protection and 2L+ water per person; Rain shell + pack cover; Waterproof boots — plus navigation and a basic first-aid kit — the full weather-computed list is on this page.
See also: the best national parks to visit in September · Last verified 2026-09-24