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United States weather

Weather in Boise, Idaho for August 2026

Your guide to Boise weather in August - trends and predictions

    Temperatures

  • Until now, August 2026 in Boise has been nearly identical to the historical average, with a temperature of 34.4 °F (showing only a slight deviation of 0.4 °F).

  • The forecast for the upcoming days in Boise predicts a temperature of 35.5 °F, which is slightly above the historical average.

  • In general, the average temperature in Boise at the beginning of August is 34 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 29.4 °F by the end of August.

    • Rain 🌧️

  • Precipitation in Boise during August is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
31
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/17°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
28 %
Avg humidity

Boise Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
36°
2
Sunny
34°
3
Sunny
34°
4
Sunny
31°
5
Sunny
35°
6
Sunny
35°
7
Sunny
33°
8
Partly cloudy
31°
9
Sunny
37°
10
Sunny
36°
11
Sunny
38°
12
Smoky haze
36°
13
Sunny
35°
14
Sunny
34°
15
Sunny
33°
16
Sunny
36°
17
Sunny
36°
18
Sunny
30°
19
Sunny
35°
20
Sunny
37°
21
Sunny
38°
22
Sunny
33°
23
Partly cloudy
31°
24
Thundery outbreaks possible
26°
25
Patchy rain possible
27°
26
Sunny
28°
27
Sunny
30°
28
Sunny
26°
29
Sunny
30°
30
Sunny
32°
31
Sunny
33°

Temperatures trend during August in Boise

See the weather trend as well as the moving average line

August weather in Boise day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Sunny
Sunny
 36° /20° 0 mm 9
Aug. 2 Sunny
Sunny
 34° /19° 0 mm 9
Aug. 3 Sunny
Sunny
 34° /19° 0.2 mm 9
Aug. 4 Sunny
Sunny
 31° /15° 0.2 mm 8
Aug. 5 Sunny
Sunny
 35° /18° 0 mm 9
Aug. 6 Sunny
Sunny
 35° /18° 0 mm 9
Aug. 7 Sunny
Sunny
 33° /17° 0 mm 8
Aug. 8 Partly cloudy
Partly cloudy
 31° /16° 0 mm 8
Aug. 9 Sunny
Sunny
 37° /17° 0 mm 6.4
Aug. 10 Sunny
Sunny
 36° /17° 0 mm 5.5
Aug. 11 Sunny
Sunny
 38° /17° 0 mm 6.5
Aug. 12 Smoky haze
Smoky haze
 36° /17° 0 mm 5.7
Aug. 13 Sunny
Sunny
 35° /17° 0 mm 8
Aug. 14 Sunny
Sunny
 34° /18° 0 mm 8
Aug. 15 Sunny
Sunny
 33° /21° 0.1 mm 8
Aug. 16 Sunny
Sunny
 36° /18° 0 mm 9
Aug. 17 Sunny
Sunny
 36° /20° 0 mm 9
Aug. 18 Sunny
Sunny
 30° /18° 3 mm 7
Aug. 19 Sunny
Sunny
 35° /17° 0 mm 9
Aug. 20 Sunny
Sunny
 37° /21° 0 mm 9
Aug. 21 Sunny
Sunny
 38° /20° 0 mm 9
Aug. 22 Sunny
Sunny
 33° /17° 0 mm 8
Aug. 23 Partly cloudy
Partly cloudy
 31° /17° 0 mm 8
Aug. 24 Thundery outbreaks possible
Thundery outbreaks possible
 26° /16° 0 mm 6
Aug. 25 Patchy rain possible
Patchy rain possible
 27° /16° 0 mm 6
Aug. 26 Sunny
Sunny
 28° /15° 0 mm 7
Aug. 27 Sunny
Sunny
 30° /17° 0 mm 7
Aug. 28 Sunny
Sunny
 26° /12° 0 mm 7
Aug. 29 Sunny
Sunny
 30° /13° 0 mm 8
Aug. 30 Sunny
Sunny
 32° /16° 0 mm 8
Aug. 31 Sunny
Sunny
 33° /17° 0 mm 8
Next
Important Notice
Our weather forecast for Boise in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boise forecast closer to your planned date for the most up-to-date weather information.
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Boise in August - FAQ

What are the expected maximum and minimum temperatures in Boise during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 17° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in Boise during August?
Rainfall in Boise during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.

What are the typical wind conditions in Boise during August?
The average wind speed in Boise during August is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Boise

Explore the daily rainfall trends and prepare for Boises August weather 💧

UV exposure in Boise during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Get accurate weather forecasts for Boise, located at latitude 43.614 and longitude -116.203. Stay updated with localized weather information tailored for Boise.

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