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Phoenix weather in August 2025
Expect 39°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Phoenix in August. Check more long-term weather averages for Phoenix in August before you book your next holiday to Arizona in 2025/2026.
- 3939°C max day temperature
- 12 hours of sunshine per day
- 55 days with some rainfall
- 2424°C min night temperature
- 1313 hours of daylight per day
- VHVery High heat & humidity
- 3232 mm of monthly rainfall
- 1010 (Very High) UV index
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The August weather guide for Arizona (Phoenix) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Arizona
How hot is it in Phoenix in August?
Daytime temperatures usually reach 39°C in Phoenix in August with very high heat and humidity, falling to 24°C at night.
How sunny is it in Phoenix in August?
There are normally 12 hours of bright sunshine each day in Phoenix in August - that's 86% of daylight hours.
Does it ever rain in Phoenix in August?
There are usually 5 days with some rain in Phoenix in August and the average monthly rainfall is 32mm.
Phoenix August sunrise & sunset times
Browse the sunrise and sunset times for Phoenix in August 2025. Select a month to view Phoenix sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st August 2025 | 05:41 | 19:28 |
Saturday, 16th August 2025 | 05:52 | 19:13 |
Sunday, 31st August 2025 | 06:02 | 18:55 |
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