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When to go · Phoenix

Phoenix in August

Avoid month. Listed as a month to avoid: Jun–Aug (extreme heat), late Jul–Sep monsoon storms.

Key facts

Verdict
Avoid
Temperature
41°C / 29°C
average high / low
Rain days
4
Crowds
High
United States overall
Prices
High
United States overall

Verdict

AvoidBest and avoid months for Phoenix

Listed as a month to avoid: Jun–Aug (extreme heat), late Jul–Sep monsoon storms.

Weather in August

Long-term averages
  • PhoenixHighs around 41 °C, lows around 29 °C, rain on about 4 days
  • Desert Southwest, United States · Las Vegas, Phoenix, Grand Canyon, Zion, Bryce, Death Valleyhot

    Spring and autumn are park season; June–August tops 40–45 °C in the low desert, and July–September monsoon storms bring flash floods in canyons.

Crowds and prices

Crowds · United States overall
High
Prices · United States overall
High

United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.

High-price month: see what to book ahead.

What to pack

  • Light, breathable clothes, a sun hat and sunscreen

Build the full packing list for your trip →

Across United States in August →