Badlands in September: Crowds, Weather & What to Pack
Shoulder · VisitWhen score 74/100 · #5 of 12 months
September is a solid shoulder-season month to visit Badlands National Park: crowds run 56% of the July peak (137,202 average visits). Weather: highs average 79°F and lows 47°F, with 1.2″ of precipitation and 12.6 hours of daylight. Computed from NPS and NOAA data.
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Crowds in September
Badlands averages 137,202 recreation visits in September — 56% of what July, the peak month, draws. That crowd level sets the tone for parking, permits and lodging.
Weather & daylight
Days are pleasant (highs average 79°F), and nights stay mild (lows average 47°F). It is typically dry (1.2″ of precipitation). Mid-month daylight runs 12.6 hours.
NOAA 1991–2020 monthly normals, station WASTA, SD US (22 mi from park coordinates, 2,328 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for Badlands in September
Computed from the month's weather normals above — not a generic list.
- A light layer you can shed by midday (long sleeve or windbreaker) — a 32°F swing between the average low of 47°F and high of 79°F
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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Want quieter or kinder conditions? The computed best months for Badlands are April and May.
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 Badlands crowded in September?
Moderately: September runs 56% of the July peak, averaging 137,202 visits (NPS, 2021–2025).
What is the weather like in Badlands in September?
Average highs of 79°F, lows of 47°F, 1.2″ of precipitation (NOAA 1991–2020 normals, WASTA, SD US station).
What should I pack for Badlands in September?
A light layer you can shed by midday (long sleeve or windbreaker); 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 2026-09-24