Virgin Islands in September: Crowds, Weather & What to Pack
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September is one of the best months of the year to visit Virgin Islands National Park: crowds run 34% of the March peak (13,653 average visits), days average 89°F with 12.3 hours of daylight. Computed from NPS and NOAA data.
Crowds in September
Virgin Islands averages 13,653 recreation visits in September — 34% of what March, the peak month, draws — the quietest month of the year. Trailheads and parking fill accordingly.
Weather & daylight
Days run warm (highs average 89°F), and even nights stay hot (lows average 80°F). This is one of the wetter months (5.9″ of precipitation on average). Mid-month daylight runs 12.3 hours.
NOAA 1991–2020 monthly normals, station CHARLOTTE AMALIE AP, VI VQ (16 mi from park coordinates, 20 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for Virgin Islands in September
Computed from the month's weather normals above — not a generic list.
- Sun protection and 2L+ water per person — highs average 89°F
- Rain shell + pack cover — 5.9″ of precipitation is normal this month
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
Common questions
Is Virgin Islands crowded in September?
No — September is one of the quieter months: 34% of the March peak, averaging 13,653 visits (NPS, 2021–2025).
What is the weather like in Virgin Islands in September?
Average highs of 89°F, lows of 80°F, 5.9″ of precipitation (NOAA 1991–2020 normals, CHARLOTTE AMALIE AP, VI VQ station).
What should I pack for Virgin Islands in September?
Sun protection and 2L+ water per person; Rain shell + pack cover; Sturdy broken-in footwear, 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 2026-07-16