August · United States
Best time to visit Phoenix in August Weather, crowds & prices
Weather in Phoenix in August
Average temperature 34°C, 36 mm of rain, about 31 days with 6+ hours of sunshine and 35% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
6.2/10
Ranked #9 of 12 months
- Avg temp
- 34°C
- Rainfall
- 36 mm
- Humidity
- 35%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $ · Budget Friendly ($)
August in Phoenix scores 6.2/10 for sightseeing and cultural travel - ranked #9 of 12. Expect around 34°C, 36 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Phoenix spreads across the Sonoran desert, with mountain trails, resorts and saguaro forests around it.
August in Phoenix — workable with trade-offs
At 34°C (93°F), August is at its most extreme: early starts are not optional, and afternoons belong indoors.
With around 36 mm of rain, any showers tend to pass through rather than settle in; about 31 days with 6+ hours of sunshine and 13.2 hours of daylight fill the rest.
That is 6.2/10 on the same scale — 9th of 12 months, versus 9.6/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
Expect low-season pricing, and crowds are moderate.
If your dates are flexible, March is materially better in Phoenix — 3.4 points higher on the same scale.
Frequently asked
- What is the weather like in Phoenix in August?
- In August, Phoenix averages 34°C, 36 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 6.2/10.
- Is August a good time to visit Phoenix?
- August earns a 6.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Phoenix in August?
- Expect about 36 mm of rain in August. Average humidity is 35% and there are about 31 days with 6+ hours of sunshine.
Curated in Phoenix
Tickets & experiences
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Phoenix, United States. Live activities and tours from GetYourGuide, matched to this destination.