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Arizona weather in August 2025
Expect 39°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Arizona in August. Check more long-term weather averages for Arizona in August before you book your next holiday to Arizona in 2025/2026.
- 39°C max day temperature
39 - 12 hours of sunshine per day
- 5 days with some rainfall
5 - 24°C min night temperature
24 - 13 hours of daylight per day
13 - Very High heat & humidity
VH - 32 mm of monthly rainfall
32 - 10 (Very High) UV index
10
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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.
Top Arizona destinations
Below are average maximum temperatures at popular countries, regions and places in Arizona in August. Select a holiday destination to see more weather parameters.
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Metric (°C / mm) | Imperial (°F / inches)
More about Arizona
How hot is it in Arizona in August?
Daytime temperatures usually reach 39°C in Phoenix, Arizona in August with very high heat and humidity, falling to 24°C at night.
How sunny is it in Arizona in August?
There are normally 12 hours of bright sunshine each day in Phoenix, Arizona in August - that's 86% of daylight hours.
Does it ever rain in Arizona in August?
There are usually 5 days with some rain in Phoenix, Arizona in August and the average monthly rainfall is 32mm.
Arizona August sunrise & sunset times
Browse the sunrise and sunset times for Arizona in August 2025. Select a month to view Arizona sunrise and sunset times for the next 12 months. The Arizona sunrise and sunset times shown below are for Phoenix.
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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