Portland (OR)
August
Weather in Portland, Oregon for August 2026
Your guide to Portland weather in August - trends and predictions
In general, the average temperature in Portland at the beginning of August is 28 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 28.6 °F by the end of August.
Portland experiences moderate rainfall in August, with an average of 6 rainy days and a total precipitation of 36.2 mm.
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Temperatures
Rain 🌧️
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25
Dry days
6
Rainy days
0
Snow days
28°/16°
Temperatures
12 km/h
Avg max wind
56 %
Avg humidity
Portland Weather August
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Temperatures trend during August in Portland
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August weather in Portland day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 29° /14° | 0 mm | 7 | |
| Aug. 2 | Overcast | 30° /16° | 0 mm | 7 | |
| Aug. 3 |  Partly cloudy | 27° /15° | 0 mm | 7 | |
| Aug. 4 |  Cloudy | 28° /14° | 0 mm | 7 | |
| Aug. 5 |  Patchy rain possible | 29° /15° | 0.1 mm | 7 | |
| Aug. 6 |  Moderate rain at times | 26° /16° | 7.9 mm | 6 | |
| Aug. 7 | Overcast | 27° /15° | 0 mm | 6 | |
| Aug. 8 | Overcast | 29° /14° | 0 mm | 6 | |
| Aug. 9 | Patchy rain possible | 29° /16° | 0.1 mm | 7 | |
| Aug. 10 |  Sunny | 32° /16° | 0 mm | 8 | |
| Aug. 11 | Partly cloudy | 31° /16° | 0 mm | 7 | |
| Aug. 12 | Overcast | 31° /16° | 0 mm | 7 | |
| Aug. 13 | Sunny | 30° /15° | 0 mm | 7 | |
| Aug. 14 | Sunny | 31° /16° | 0 mm | 8 | |
| Aug. 15 | Sunny | 30° /17° | 0.5 mm | 7 | |
| Aug. 16 | Sunny | 29° /17° | 18.6 mm | 7 | |
| Aug. 17 | Overcast | 30° /16° | 1.1 mm | 7 | |
| Aug. 18 | Overcast | 25° /15° | 0.1 mm | 6 | |
| Aug. 19 | Sunny | 28° /13° | 0 mm | 7 | |
| Aug. 20 | Partly cloudy | 28° /14° | 0.1 mm | 6 | |
| Aug. 21 | Overcast | 28° /13° | 0 mm | 6 | |
| Aug. 22 | Overcast | 28° /14° | 1.6 mm | 6 | |
| Aug. 23 | Overcast | 27° /15° | 3.8 mm | 6 | |
| Aug. 24 | Sunny | 29° /14° | 0.5 mm | 7 | |
| Aug. 25 | Patchy rain possible | 30° /16° | 0.5 mm | 7 | |
| Aug. 26 | Sunny | 33° /17° | 0 mm | 8 | |
| Aug. 27 | Sunny | 29° /16° | 0.1 mm | 7 | |
| Aug. 28 | Overcast | 28° /14° | 0 mm | 6 | |
| Aug. 29 | Overcast | 27° /14° | 0 mm | 6 | |
| Aug. 30 | Overcast | 28° /15° | 0 mm | 6 | |
| Aug. 31 | Light rain shower | 25° /15° | 1.1 mm | 6 | |
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Important Notice
Our weather forecast for Portland 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 Portland forecast closer to your planned date for the most up-to-date weather information.
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Portland in August - FAQ
What are the expected maximum and minimum temperatures in Portland during August?
During August, expect a variety of temperatures with highs around 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portland during August?
In August, Portland can expect light to moderate rainfall, totaling 36.2 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Portland during August?
The average wind speed in Portland during August is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Portland
Explore the daily rainfall trends and prepare for Portlands August weather 💧
Typically, Portland has 6 rainy days in August with a total of 36.2 mm of rainfall.
UV exposure in Portland during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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