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 maximum daytime temperature in August in Arizona (Phoenix)39
    39°C max day temperature
  • 12 hours of sunshine per day
  • 5 days with some rainfall in August in Arizona (Phoenix)5
    5 days with some rainfall
  • 24°C minimum night-time temperature in August in Arizona (Phoenix)24
    24°C min night temperature
  • 13 hours of daylight per day in August in Arizona (Phoenix)13
    13 hours of daylight per day
  • Very high heat & humidity in August in Arizona (Phoenix)VH
    Very High heat & humidity
  • 32 mm monthly rainfall in August in Arizona (Phoenix)32
    32 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Arizona (Phoenix)10
    10 (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.

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.

All Arizona destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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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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