Typical August weather
Boise
Idaho · August
91° days
61° nights
rain is rare · 14 hours of daylight
What to pack
- Swimsuit
- Sunscreen
- Layers
What August feels like
Smoke from fires elsewhere in the West dulls the Foothills for a week or two most summers; when the air is clear you can see a very long way from the ridge. The Western Idaho Fair lands at the end of the month, the students come back, and the average age of downtown drops overnight.
Rain is genuinely rare — most years, August stays dry start to finish. The air runs dry — whatever the thermometer says, it wears easy. about 20 afternoons top 90°.
The numbers
| Typical high | 91° |
|---|---|
| Typical low | 61° |
| Days with real rain | 0 |
| Total rain | 0.2 in |
| Humidity | dry air |
| Sunrise / sunset (mid-month) | 6:49 am / 8:48 pm |