Portland
August
Weather in Portland for August 2025
Your guide to Portland weather in August - trends and predictions
In general, the average temperature in Portland at the beginning of August is 26 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °F by the end of August.
The climate of Portland in August is notably wet, with an average of 15 rainy days, and a total of 44.3 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
23°/16°
Temperatures
14 km/h
Avg max wind
77 %
Avg humidity
Portland Weather August
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  27° | 2  28° | |||||
| 3 25° | 4  28° | 5 30° | 6 23° | 7 21° | 8 21° | 9 20° |
| 10 29° | 11 25° | 12 23° | 13 25° | 14  24° | 15 23° | 16 23° |
| 17  25° | 18 23° | 19 21° | 20 19° | 21 18° | 22 19° | 23 23° |
| 24  25° | 25 24° | 26  22° | 27 25° | 28 20° | 29 21° | 30 20° |
| 31 21° |
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Temperatures trend during August in Portland
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 | Light rain shower | 27° /20° | 3.2 mm | 6 | |
| Aug. 2 | Partly cloudy | 28° /20° | 0 mm | 7 | |
| Aug. 3 | Light rain shower | 25° /20° | 4.8 mm | 6 | |
| Aug. 4 | Patchy light drizzle | 28° /20° | 1.3 mm | 6 | |
| Aug. 5 | Patchy rain possible | 30° /19° | 0.8 mm | 7 | |
| Aug. 6 | Patchy rain possible | 23° /17° | 0.6 mm | 5 | |
| Aug. 7 | Patchy rain possible | 21° /15° | 1 mm | 5 | |
| Aug. 8 | Partly cloudy | 21° /13° | 0 mm | 6 | |
| Aug. 9 | Light rain | 20° /16° | 3.3 mm | 5 | |
| Aug. 10 | Light drizzle | 29° /20° | 3.9 mm | 6 | |
| Aug. 11 | Partly cloudy | 25° /16° | 0 mm | 7 | |
| Aug. 12 | Patchy rain possible | 23° /16° | 0.2 mm | 5 | |
| Aug. 13 | Partly cloudy | 25° /14° | 0 mm | 7 | |
| Aug. 14 | Moderate rain at times | 24° /15° | 1.7 mm | 5 | |
| Aug. 15 | Light rain shower | 23° /15° | 3.2 mm | 5 | |
| Aug. 16 | Patchy rain possible | 23° /15° | 0.1 mm | 5 | |
| Aug. 17 | Mist | 25° /17° | 0 mm | 6 | |
| Aug. 18 | Patchy rain possible | 23° /17° | 0.1 mm | 5 | |
| Aug. 19 | Light rain | 21° /17° | 4.6 mm | 5 | |
| Aug. 20 | Light rain shower | 19° /14° | 4.5 mm | 4 | |
| Aug. 21 | Patchy rain possible | 18° /13° | 1.8 mm | 4 | |
| Aug. 22 | Light rain shower | 19° /10° | 4.9 mm | 4 | |
| Aug. 23 | Partly cloudy | 23° /11° | 0 mm | 6 | |
| Aug. 24 | Sunny | 25° /15° | 0 mm | 7 | |
| Aug. 25 | Partly cloudy | 24° /16° | 0 mm | 6 | |
| Aug. 26 | Thundery outbreaks possible | 22° /16° | 1.7 mm | 5 | |
| Aug. 27 | Partly cloudy | 25° /15° | 0 mm | 7 | |
| Aug. 28 | Light rain | 20° /17° | 1 mm | 5 | |
| Aug. 29 | Sunny | 21° /12° | 0 mm | 6 | |
| Aug. 30 | Sunny | 20° /11° | 0 mm | 6 | |
| Aug. 31 | Patchy light rain | 21° /13° | 1.8 mm | 5 | |
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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.
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 23° 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 44.3 mm across approximately 15 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 14 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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