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), days average 86°F with 12 hours of daylight. Computed from NPS and NOAA data.

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
• Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

If your dates are flexible, consider shifting: The computed best months for American Samoa are June and August.

Common questions

See also: the best national parks to visit in September · Last verified 2026-07-16