Multnomah County (Portland)
August
Weather in Multnomah County for August 2025
Your guide to Multnomah County weather in August - trends and predictions
In general, the average temperature in Multnomah County at the beginning of August is 31.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 28 °F by the end of August.
With an average of 4 rainy days, Multnomah County experiences minimal rainfall in August.
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27
Dry days
4
Rainy days
0
Snow days
31°/15°
Temperatures
14 km/h
Avg max wind
54 %
Avg humidity
Multnomah County in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2  34° | 3  30° | ||||
| 4  32° | 5  31° | 6  29° | 7 30° | 8 30° | 9 29° | 10 30° |
| 11 29° | 12 28° | 13 32° | 14 34° | 15 33° | 16 32° | 17 32° |
| 18 26° | 19 28° | 20 29° | 21 25° | 22 23° | 23 21° | 24 24° |
| 25 29° | 26 32° | 27 27° | 28 27° | 29 27° | 30 28° | 31 26° |
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Temperatures trend during August in Multnomah County
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 | Overcast | 34° /14° | 0 mm | 8 | |
| Aug. 2 | Sunny | 34° /17° | 0 mm | 8 | |
| Aug. 3 | Partly cloudy | 30° /16° | 0 mm | 8 | |
| Aug. 4 | Cloudy | 32° /15° | 0 mm | 8 | |
| Aug. 5 | Patchy rain possible | 31° /16° | 0.1 mm | 8 | |
| Aug. 6 | Moderate rain at times | 29° /16° | 0.2 mm | 7 | |
| Aug. 7 | Overcast | 30° /15° | 0 mm | 7 | |
| Aug. 8 | Overcast | 30° /15° | 0 mm | 7 | |
| Aug. 9 | Patchy rain possible | 29° /17° | 0.2 mm | 7 | |
| Aug. 10 | Overcast | 30° /15° | 0 mm | 7 | |
| Aug. 11 | Partly cloudy | 29° /14° | 0 mm | 7 | |
| Aug. 12 | Overcast | 28° /14° | 0 mm | 7 | |
| Aug. 13 | Sunny | 32° /14° | 0 mm | 8 | |
| Aug. 14 | Sunny | 34° /16° | 0 mm | 9 | |
| Aug. 15 | Sunny | 33° /17° | 0 mm | 8 | |
| Aug. 16 | Sunny | 32° /17° | 0 mm | 8 | |
| Aug. 17 | Overcast | 32° /16° | 1.7 mm | 7 | |
| Aug. 18 | Overcast | 26° /14° | 0.1 mm | 6 | |
| Aug. 19 | Sunny | 28° /11° | 0 mm | 8 | |
| Aug. 20 | Partly cloudy | 29° /13° | 0.2 mm | 7 | |
| Aug. 21 | Overcast | 25° /13° | 0 mm | 6 | |
| Aug. 22 | Overcast | 23° /13° | 2.5 mm | 5 | |
| Aug. 23 | Overcast | 21° /12° | 5.7 mm | 5 | |
| Aug. 24 | Sunny | 24° /11° | 0.8 mm | 6 | |
| Aug. 25 | Patchy rain possible | 29° /14° | 0.8 mm | 7 | |
| Aug. 26 | Sunny | 32° /15° | 0 mm | 8 | |
| Aug. 27 | Sunny | 27° /15° | 0.1 mm | 7 | |
| Aug. 28 | Overcast | 27° /13° | 0 mm | 6 | |
| Aug. 29 | Overcast | 27° /13° | 0 mm | 7 | |
| Aug. 30 | Overcast | 28° /15° | 0 mm | 7 | |
| Aug. 31 | Light rain shower | 26° /15° | 1.6 mm | 6 | |
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Important Notice
Our weather forecast for Multnomah County 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 Multnomah County forecast closer to your planned date for the most up-to-date weather information.
Multnomah County in August - FAQ
What are the expected maximum and minimum temperatures in Multnomah County during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 15° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Multnomah County during August?
Rainfall in Multnomah County during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 4 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 Multnomah County during August?
The average wind speed in Multnomah County during August is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Multnomah County
Explore the daily rainfall trends and prepare for Multnomah Countys August weather 💧
UV exposure in Multnomah County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is Multnomah County?Get accurate weather forecasts for Multnomah County, located at latitude 45.523 and longitude -122.676. Stay updated with localized weather information tailored for Multnomah County.
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