Monument Valley weather in August 2025

Expect 90°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Monument Valley in August. Check more long-term weather averages for Monument Valley in August before you book your next holiday to Arizona in 2025/2026.

  • 90°F maximum daytime temperature in August in Monument Valley90
    90°F max day temperature
  • 11 hours of sunshine per day
  • 8 days with some rainfall in August in Monument Valley8
    8 days with some rainfall
  • 57°F minimum night-time temperature in August in Monument Valley57
    57°F min night temperature
  • 14 hours of daylight per day in August in Monument Valley14
    14 hours of daylight per day
  • High heat & humidity in August in Monument ValleyH
    High heat & humidity
  • 1.1 inches monthly rainfall in August in Monument Valley1.1
    1.1 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Monument Valley10
    10 (Very High) UV index

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The August weather guide for Arizona (Monument Valley) 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)  |  Imperial (°F)

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More about Arizona

How hot is it in Monument Valley in August?

Daytime temperatures usually reach 90°F in Monument Valley in August with high heat and humidity, falling to 57°F at night.

How sunny is it in Monument Valley in August?

There are normally 11 hours of bright sunshine each day in Monument Valley in August - that's 78% of daylight hours.

Does it rain in Monument Valley in August?

There are usually 8 days with some rain in Monument Valley in August and the average monthly rainfall is 1.1 inches.

Monument Valley August sunrise & sunset times

Browse the sunrise and sunset times for Monument Valley in August 2025. Select a month to view Monument Valley sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:26 19:27
Saturday, 16th August 2025 05:39 19:10
Sunday, 31st August 2025 05:51 18:50

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