Petrified Forest in May: Crowds, Weather & What to Pack
Peak crowds · VisitWhen score 66/100 · #6 of 12 months
May is peak season — expect the year's biggest crowds at Petrified Forest National Park: crowds run 91% of the June peak (58,041 average visits), days average 78°F with 14 hours of daylight. Computed from NPS and NOAA data.
Crowds in May
Petrified Forest averages 58,041 recreation visits in May — 91% of what June, the peak month, draws. Trailheads and parking fill accordingly — book early and start days at dawn.
Weather & daylight
Days are mild (highs average 78°F), and mornings are chilly (lows average 44°F). It is typically dry (0.5″ of precipitation). Mid-month daylight runs 14 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 May.
What to pack for Petrified Forest in May
Computed from the month's weather normals above — not a generic list.
- Warm mid-layer (fleece or light puffy) — mornings average 44°F
- 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 Petrified Forest are February and April.
Also at their best in May
Other parks whose computed May verdict is a best window — same NPS × NOAA formula:
- Lake Clark in May — 7% of peak crowds, highs 59°F, score 96/100
- North Cascades in May — 11% of peak crowds, highs 69°F, score 96/100
- Katmai in May — 1% of peak crowds, highs 52°F, score 95/100
- Gates of the Arctic in May — 12% of peak crowds, highs 56°F, score 94/100
Common questions
Is Petrified Forest crowded in May?
Yes — May runs 91% of Petrified Forest's peak, averaging 58,041 recreation visits (NPS, 2021–2025).
What is the weather like in Petrified Forest in May?
Average highs of 78°F, lows of 44°F, 0.5″ of precipitation (NOAA 1991–2020 normals, PAINTED DESERT NP, AZ US station).
What should I pack for Petrified Forest in May?
Warm mid-layer (fleece or light puffy); 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 May · Last verified 2026-09-12