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.
With an average of 4 rainy days, Portland experiences minimal rainfall in August.
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Temperatures
Rain 🌧️
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27
Dry days
4
Rainy days
0
Snow days
29°/15°
Temperatures
13 km/h
Avg max wind
55 %
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 29° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portland during August?
Expect minimal rainfall in Portland during August, with a total of 13.9 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Portland during August?
The average wind speed in Portland during August is 13 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 💧
UV exposure in Portland during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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