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Sun Valley weather in August 2025
Expect 77°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Sun Valley in August. Check more long-term weather averages for Sun Valley in August before you book your next holiday to Idaho in 2025/2026.
- 7777°F max day temperature
- 10 hours of sunshine per day
- 88 days with some rainfall
- 4141°F min night temperature
- 1414 hours of daylight per day
- 0No heat & humidity
- 1.11.1 inches of monthly rainfall
- 99 (Very High) UV index
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The August weather guide for Idaho (Sun 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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How hot is it in Sun Valley in August?
Daytime temperatures usually reach 77°F in Sun Valley in August with no heat and humidity, falling to 41°F at night.
How sunny is it in Sun Valley in August?
There are normally 10 hours of bright sunshine each day in Sun Valley in August - that's 75% of daylight hours.
Does it rain in Sun Valley in August?
There are usually 8 days with some rain in Sun Valley in August and the average monthly rainfall is 1.1 inches.
Sun Valley August sunrise & sunset times
Browse the sunrise and sunset times for Sun Valley in August 2025. Select a month to view Sun Valley sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st August 2025 | 05:27 | 20:00 |
Saturday, 16th August 2025 | 05:44 | 19:39 |
Sunday, 31st August 2025 | 06:00 | 19:14 |
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