Boise weather in August
August in Boise averages 91°F by day and 61°F at night, with 0.2 inches of precipitation. It is the 2nd-warmest and 12th-wettest month of the year here.
- Average high
- 91°F-2° vs July
- Average low
- 61°F0 nights below freezing
- Precipitation
- 0.2 in0 days with 0.1 in. or more
- Snow
- 0.0 in20 days at 90°F+
Is August a good time to visit Boise?
August is hot. Average highs reach 91°F, with about 20 days at 90°F or more. The most comfortable months overall are May to June and September.
On August 15 the sun rises at 6:50 am and sets at 8:47 pm, giving 13h 58m of daylight. Daylight all year.
What to pack for Boise in August
- Light, breathable clothes, a hat and sunscreen; carry water
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
August nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| Boise | 91°F | 61°F | 0.2 in | |
| Meridian, ID | 8 mi | 91°F | 61°F | 0.2 in |
| Nampa, ID | 18 mi | 92°F | 56°F | 0.2 in |
| Caldwell, ID | 26 mi | 92°F | 56°F | 0.2 in |
| Kennewick, WA | 229 mi | 91°F | 56°F | 0.3 in |
| Pasco, WA | 231 mi | 91°F | 56°F | 0.3 in |
| Missoula, MT | 251 mi | 84°F | 50°F | 0.8 in |
Frequently asked questions
What is the weather like in Boise in August?
In August, Boise averages a high of 91°F and a low of 61°F, with 0.2 inches of precipitation (NOAA 1991-2020 normals).
Is August a good time to visit Boise?
August is hot in Boise, with average highs of 91°F. Plan outdoor time for mornings and evenings.
Does it snow in Boise in August?
Rarely. The August snowfall normal is under half an inch.
Before and after: Boise in July and Boise in September. All twelve months: Boise weather by month.
NOAA NCEI 1991-2020 climate normals, station Boise Air Terminal, ID, 2.3 miles from the city center.