Lewiston (ID)
August
Weather in Lewiston, Idaho for August 2026
Your guide to Lewiston weather in August - trends and predictions
In general, the average temperature in Lewiston at the beginning of August is 27.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 34.7 °F by the end of August.
Precipitation in Lewiston during August is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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30
Dry days
1
Rainy days
0
Snow days
32°/15°
Temperatures
15 km/h
Avg max wind
41 %
Avg humidity
Lewiston Weather August
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Temperatures trend during August in Lewiston
See the weather trend as well as the moving average line
August weather in Lewiston day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Thundery outbreaks possible | 21° /15° | 0 mm | 5 | |
| Aug. 2 |  Sunny | 34° /14° | 0 mm | 8 | |
| Aug. 3 |  Partly cloudy | 32° /14° | 0 mm | 8 | |
| Aug. 4 |  Heavy rain at times | 25° /14° | 16.8 mm | 6 | |
| Aug. 5 |  Overcast | 29° /12° | 0 mm | 6 | |
| Aug. 6 | Overcast | 27° /14° | 0 mm | 6 | |
| Aug. 7 | Thundery outbreaks possible | 23° /13° | 0 mm | 5 | |
| Aug. 8 | Partly cloudy | 27° /8° | 0 mm | 7 | |
| Aug. 9 | Partly cloudy | 31° /13° | 0 mm | 8 | |
| Aug. 10 | Sunny | 34° /14° | 0 mm | 8 | |
| Aug. 11 | Sunny | 37° /18° | 0 mm | 9 | |
| Aug. 12 | Sunny | 38° /18° | 0 mm | 9 | |
| Aug. 13 | Sunny | 36° /17° | 0 mm | 9 | |
| Aug. 14 | Sunny | 29° /14° | 0 mm | 7 | |
| Aug. 15 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| Aug. 16 | Overcast | 23° /16° | 0 mm | 5 | |
| Aug. 17 | Overcast | 29° /12° | 0 mm | 6 | |
| Aug. 18 | Overcast | 31° /16° | 0 mm | 7 | |
| Aug. 19 | Partly cloudy | 32° /18° | 0 mm | 8 | |
| Aug. 20 | Sunny | 30° /14° | 0 mm | 8 | |
| Aug. 21 | Sunny | 31° /12° | 0 mm | 8 | |
| Aug. 22 | Sunny | 35° /14° | 0 mm | 9 | |
| Aug. 23 | Sunny | 38° /15° | 0 mm | 9 | |
| Aug. 24 | Partly cloudy | 39° /18° | 0 mm | 9 | |
| Aug. 25 | Sunny | 37° /19° | 0 mm | 9 | |
| Aug. 26 | Overcast | 33° /17° | 0 mm | 7 | |
| Aug. 27 | Overcast | 31° /20° | 0 mm | 7 | |
| Aug. 28 | Overcast | 33° /19° | 0 mm | 7 | |
| Aug. 29 | Sunny | 34° /13° | 0 mm | 8 | |
| Aug. 30 | Sunny | 36° /14° | 0 mm | 9 | |
| Aug. 31 | Partly cloudy | 39° /18° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Lewiston 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 Lewiston forecast closer to your planned date for the most up-to-date weather information.
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Lewiston in August - FAQ
What are the expected maximum and minimum temperatures in Lewiston during August?
Expect warm days with temperatures around 32°, cooling to mild conditions of 15° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Lewiston during August?
Expect minimal rainfall in Lewiston during August, with a total of 16.8 mm over approximately 1 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Lewiston during August?
The average wind speed in Lewiston during August is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Lewiston
Explore the daily rainfall trends and prepare for Lewistons August weather 💧
UV exposure in Lewiston during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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