Petrified Forest in September: Crowds, Weather & What to Pack
Shoulder · VisitWhen score 68/100 · #4 of 12 months
September is a solid shoulder-season month to visit Petrified Forest National Park: crowds run 67% of the June peak (42,663 average visits), days average 82°F with 12.4 hours of daylight. Computed from NPS and NOAA data.
Crowds in September
Petrified Forest averages 42,663 recreation visits in September — 67% of what June, the peak month, draws. Plan lodging and entries with that in mind.
Weather & daylight
Expect warm days (highs average 82°F), and nights stay mild (lows average 51°F). It is typically dry (1.1″ of precipitation). Mid-month daylight runs 12.4 hours.
NOAA 1991–2020 monthly normals, station PAINTED DESERT NP, AZ US (2 mi from park coordinates, 5,760 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for Petrified Forest in September
Computed from the month's weather normals above — not a generic list.
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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Looking for a better window? The computed best months for Petrified Forest are February and April.
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 Petrified Forest crowded in September?
Moderately: September runs 67% of the June peak, averaging 42,663 visits (NPS, 2021–2025).
What is the weather like in Petrified Forest in September?
Average highs of 82°F, lows of 51°F, 1.1″ of precipitation (NOAA 1991–2020 normals, PAINTED DESERT NP, AZ US station).
What should I pack for Petrified Forest in September?
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