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 (106°F)106°F (41°C) / 29°C (84°F)84°F (29°C); average high / low
Rain days: 4
Crowds: High; United States overall
Prices: High; United States overall

Plan around it

Verdict

AvoidBest and avoid months for Phoenix

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

August is rated avoid. These months rate higher:

Long-term averages

PhoenixHighs around 41 °C (106 °F), lows around 29 °C (84 °F), rain on about 4 daysHighs around 106 °F (41 °C), lows around 84 °F (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 (104–113 °F) in the low desert, and July–September monsoon storms bring flash floods in canyons.Spring and autumn are park season; June–August tops 104–113 °F (40–45 °C) in the low desert, and July–September monsoon storms bring flash floods in canyons.

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

Weather, crowds and prices for any two months in Phoenix, side by side.

First month

Second month

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

January: Inside Phoenix's best window: Nov–Apr.

Phoenix: figures are long-term averages from this guide, not a forecast.