Congaree in September: Crowds, Weather & What to Pack

Shoulder · VisitWhen score 62/100 · #4 of 12 months

September is a solid shoulder-season month to visit Congaree National Park: crowds run 58% of the May peak (16,974 average visits). Weather: highs average 86°F and lows 65°F, with 4.4″ of precipitation and 12.4 hours of daylight. Computed from NPS and NOAA data.

Bring for Congaree in September

Sun protection and 2L+ water per personSee it on AmazonWhy: highs average 86°F.
Rain shell + pack coverSee it on AmazonWhy: 4.4″ of precipitation is normal this month.
Waterproof boots — plus navigation and a basic first-aid kitSee it on AmazonWhy: 4.4″ of rain is normal this month.

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A view of a bottomland/floodplain forest, with wide based cypress and tupelo trees, cypress knees — Congaree National Park — photo: NPS Photo (public-domain NPS media)

Crowds in September

Congaree averages 16,974 recreation visits in September — 58% of what May, the peak month, draws. Plan lodging and entries with that in mind.

Average visits (September)

16,974 (mean 2021–2025, NPS)

Share of the year

7.1% of annual visitation

vs. peak (May)

58%

Weather & daylight

Expect warm days (highs average 86°F), and nights stay mild (lows average 65°F). This is one of the wetter months (4.4″ of precipitation on average). Mid-month daylight runs 12.4 hours.

NOAA 1991–2020 monthly normals, station N 5NE, SC US (17 mi from park coordinates, 322 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.

What to pack for Congaree 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 — 4.4″ of precipitation is normal this month
Waterproof boots — plus navigation and a basic first-aid kit — 4.4″ of rain is normal this month

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Looking for a better window? The computed best months for Congaree are January and February.

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 Congaree crowded in September?

Moderately: September runs 58% of the May peak, averaging 16,974 visits (NPS, 2021–2025).

What is the weather like in Congaree in September?

Average highs of 86°F, lows of 65°F, 4.4″ of precipitation (NOAA 1991–2020 normals, N 5NE, SC US station).

What should I pack for Congaree 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