Death Valley in September: Crowds, Weather & What to Pack

Harsh season · VisitWhen score 46/100 · #9 of 12 months

September is a harsh-season month at Death Valley National Park: crowds run 38% of the March peak (61,474 average visits), days average 108°F with 12.4 hours of daylight. Computed from NPS and NOAA data.

Extreme-heat warning: average highs of 108°F are dangerous. Plan activity for early morning, stay within reach of your vehicle, and carry far more water than feels reasonable — heat illness is the leading danger in months like this. Read the park's NPS safety guidance →

Crowds in September

Death Valley averages 61,474 recreation visits in September — 38% of what March, the peak month, draws — the quietest month of the year. Trailheads and parking fill accordingly.

Average visits (September)

61,474 (mean 2021–2025, NPS)

Share of the year

5% of annual visitation

vs. peak (March)

38%

Weather & daylight

Days are seriously hot (highs average 108°F), and even nights stay hot (lows average 79°F). It is typically dry (0.2″ of precipitation). Mid-month daylight runs 12.4 hours.

NOAA 1991–2020 monthly normals, station DEATH VALLEY NP, CA US (1 mi from park coordinates, -194 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.

What to pack for Death Valley in September

Computed from the month's weather normals above — not a generic list.

Sun hat, SPF 50+ and 3L+ water capacity — highs average 108°F
Electrolyte tablets (heat-illness prevention) — at highs of 108°F, water alone is not enough — dehydration is the real risk
Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

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If your dates are flexible, consider shifting: The computed best months for Death Valley are January and February.

Also at their best in September

Other parks whose computed September verdict is a best window — same NPS × NOAA formula:

Big Bend in September — 26% of peak crowds, highs 79°F, score 84/100
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

Common questions

Is Death Valley crowded in September?

No — September is one of the quieter months: 38% of the March peak, averaging 61,474 visits (NPS, 2021–2025).

What is the weather like in Death Valley in September?

Average highs of 108°F, lows of 79°F, 0.2″ of precipitation (NOAA 1991–2020 normals, DEATH VALLEY NP, CA US station).

What should I pack for Death Valley in September?

Sun hat, SPF 50+ and 3L+ water capacity; Electrolyte tablets (heat-illness prevention); 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 2026-09-12