Weather in Boise, Idaho, United States in August
In an average August, Boise sees a daily high around 90°F and a low around 62°F, based on 1981–2026 of local climate records.
| Average high | 90°F |
|---|---|
| Typical high range | 80°F to 99°F |
| Average low | 62°F |
| Typical low range | 55°F to 69°F |
| Average daily precipitation | 0.00 in |
August records
The most extreme August on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
108°F
2018-08-10
Lowest
58°F
1989-08-24
Low
Highest
78°F
2024-08-03
Lowest
41°F
1992-08-24
Feels-like
Highest
114°F
1983-08-07
Lowest
33°F
1992-08-24
Humidity
Highest
15.9 g/m³
2021-08-01
Lowest
2.0 g/m³
1992-08-26
Wind
Highest
33 mph
1999-08-30
Lowest
4 mph
1984-08-01
Precip
Wettest
1.55 in
2023
Driest
0.02 in
2016
See Boise's live weather grade →
Visiting Boise in August? See how its comfort stacks up against where you live.
Compare Boise with your city →