St George weather in August 2025

Expect 99°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in St George in August. Check more long-term weather averages for St George in August before you book your next holiday to Utah in 2025/2026.

  • 99°F maximum daytime temperature in August in St George99
    99°F max day temperature
  • 11 hours of sunshine per day
  • 4 days with some rainfall in August in St George4
    4 days with some rainfall
  • 68°F minimum night-time temperature in August in St George68
    68°F min night temperature
  • 14 hours of daylight per day in August in St George14
    14 hours of daylight per day
  • Very high heat & humidity in August in St GeorgeVH
    Very High heat & humidity
  • 0.7 inches monthly rainfall in August in St George0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in St George10
    10 (Very High) UV index

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The August weather guide for Utah (St George) 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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How hot is it in St George in August?

Daytime temperatures usually reach 99°F in St George in August with very high heat and humidity, falling to 68°F at night.

How sunny is it in St George in August?

There are normally 11 hours of bright sunshine each day in St George in August - that's 84% of daylight hours.

Does it rain in St George in August?

There are usually 4 days with some rain in St George in August and the average monthly rainfall is 0.7 inches.

St George August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:40 19:41
Saturday, 16th August 2025 05:52 19:24
Sunday, 31st August 2025 06:04 19:04

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