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Lewiston (ID)
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Lewiston (ID)
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Weather in Lewiston, Idaho for August 2026

Your guide to Lewiston weather in August - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • So far, August 2026 in Lewiston shows a warmer trend than usual by 2.6 °F.

  • The forecast for the upcoming days in Lewiston predicts a temperature of 33.8 °F, which is slightly above the historical average.

  • In general, the average temperature in Lewiston at the beginning of August is 30.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 34.7 °F by the end of August.

    • Rain 🌧️

  • Precipitation in Lewiston 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
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/15°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
41 %
Avg humidity

Lewiston Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Thundery outbreaks possible
28°
2
Sunny
31°
3
Partly cloudy
31°
4
Heavy rain at times
29°
5
Overcast
32°
6
Overcast
32°
7
Thundery outbreaks possible
31°
8
Partly cloudy
27°
9
Weather Alert Sunny
34°
10
Smoky haze
33°
11
Sunny
34°
12
Smoky haze
33°
13
Smoky haze
31°
14
Sunny
33°
15
Sunny
35°
16
Sunny
38°
17
Sunny
37°
18
Patchy rain possible
35°
19
Sunny
33°
20
Sunny
31°
21
Sunny
32°
22
Sunny
35°
23
Sunny
38°
24
Partly cloudy
39°
25
Sunny
37°
26
Overcast
33°
27
Overcast
31°
28
Overcast
33°
29
Sunny
34°
30
Sunny
36°
31
Partly cloudy
39°

Temperatures trend during August in Lewiston

See the weather trend as well as the moving average line

August weather in Lewiston day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Thundery outbreaks possible
Thundery outbreaks possible
 28° /18° 0 mm 8
Aug. 2 Sunny
Sunny
 31° /14° 0 mm 9
Aug. 3 Partly cloudy
Partly cloudy
 31° /13° 0 mm 9
Aug. 4 Heavy rain at times
Heavy rain at times
 29° /13° 8.4 mm 8
Aug. 5 Overcast
Overcast
 32° /12° 0 mm 8
Aug. 6 Overcast
Overcast
 32° /14° 0 mm 8
Aug. 7 Thundery outbreaks possible
Thundery outbreaks possible
 31° /15° 0 mm 8
Aug. 8 Partly cloudy
Partly cloudy
 27° /8° 0 mm 7
Aug. 9 Sunny
Sunny
 34° /20° 0 mm 5.9
Aug. 10 Smoky haze
Smoky haze
 33° /14° 0 mm 6.1
Aug. 11 Sunny
Sunny
 34° /14° 0 mm 6.3
Aug. 12 Smoky haze
Smoky haze
 33° /15° 0 mm 6.2
Aug. 13 Smoky haze
Smoky haze
 31° /14° 0 mm 8
Aug. 14 Sunny
Sunny
 33° /14° 0 mm 8
Aug. 15 Sunny
Sunny
 35° /16° 0 mm 8
Aug. 16 Sunny
Sunny
 38° /17° 0 mm 9
Aug. 17 Sunny
Sunny
 37° /19° 0 mm 9
Aug. 18 Patchy rain possible
Patchy rain possible
 35° /21° 2.8 mm 9
Aug. 19 Sunny
Sunny
 33° /16° 0 mm 8
Aug. 20 Sunny
Sunny
 31° /18° 0 mm 8
Aug. 21 Sunny
Sunny
 32° /15° 0 mm 8
Aug. 22 Sunny
Sunny
 35° /14° 0 mm 9
Aug. 23 Sunny
Sunny
 38° /15° 0 mm 9
Aug. 24 Partly cloudy
Partly cloudy
 39° /18° 0 mm 9
Aug. 25 Sunny
Sunny
 37° /19° 0 mm 9
Aug. 26 Overcast
Overcast
 33° /17° 0 mm 7
Aug. 27 Overcast
Overcast
 31° /20° 0 mm 7
Aug. 28 Overcast
Overcast
 33° /19° 0 mm 7
Aug. 29 Sunny
Sunny
 34° /13° 0 mm 8
Aug. 30 Sunny
Sunny
 36° /14° 0 mm 9
Aug. 31 Partly cloudy
Partly cloudy
 39° /18° 0 mm 9
Next
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 💧
Typically, Lewiston has 1 rainy days in August with a total of 16.8 mm of rainfall.

UV exposure in Lewiston during August

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

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Location coordinates Where is Lewiston?

Get accurate weather forecasts for Lewiston, located at latitude 46.417 and longitude -117.018. Stay updated with localized weather information tailored for Lewiston.

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