Joshua Tree in September: Crowds, Weather & What to Pack
Shoulder · VisitWhen score 64/100 · #6 of 12 months
September is a solid shoulder-season month to visit Joshua Tree National Park: crowds run 39% of the March peak (161,892 average visits), days average 96°F with 12.4 hours of daylight. Computed from NPS and NOAA data.
Crowds in September
Joshua Tree averages 161,892 recreation visits in September — 39% of what March, the peak month, draws — the third-quietest month of the year. Plan lodging and entries with that in mind.
Weather & daylight
Expect intense heat (highs average 96°F), and nights stay mild (lows average 68°F). It is typically dry (0.5″ of precipitation). Mid-month daylight runs 12.4 hours.
NOAA 1991–2020 monthly normals, station CHIRIACO SUMMIT, CA US (18 mi from park coordinates, 1,706 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for Joshua Tree in September
Computed from the month's weather normals above — not a generic list.
- Sun hat, SPF 50+ and 3L+ water capacity — highs average 96°F
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
Looking for a better window? The computed best months for Joshua Tree are January and May.
Common questions
Is Joshua Tree crowded in September?
No — September is one of the quieter months: 39% of the March peak, averaging 161,892 visits (NPS, 2021–2025).
What is the weather like in Joshua Tree in September?
Average highs of 96°F, lows of 68°F, 0.5″ of precipitation (NOAA 1991–2020 normals, CHIRIACO SUMMIT, CA US station).
What should I pack for Joshua Tree in September?
Sun hat, SPF 50+ and 3L+ water capacity; 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