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Boise weather in August 2025
Expect 31°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Boise in August. Check more long-term weather averages for Boise in August before you book your next holiday to Idaho in 2025/2026.
- 3131°C max day temperature
- 12 hours of sunshine per day
- 33 days with some rainfall
- 1313°C min night temperature
- 1414 hours of daylight per day
- MModerate heat & humidity
- 1010 mm of monthly rainfall
- 88 (Very High) UV index
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Recommended for Idaho
The August weather guide for Idaho (Boise) 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 / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Boise in August?
Daytime temperatures usually reach 31°C in Boise in August with moderate heat and humidity, falling to 13°C at night.
How sunny is it in Boise in August?
There are normally 12 hours of bright sunshine each day in Boise in August - that's 83% of daylight hours.
Does it ever rain in Boise in August?
There are usually 3 days with some rain in Boise in August and the average monthly rainfall is 10mm.
Boise August sunrise & sunset times
Browse the sunrise and sunset times for Boise in August 2025. Select a month to view Boise sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st August 2025 | 05:35 | 20:07 |
Saturday, 16th August 2025 | 05:51 | 19:46 |
Sunday, 31st August 2025 | 06:08 | 19:21 |
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