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 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, Portland experiences minimal rainfall in August.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
27
Dry days
4
Rainy days
0
Snow days
29°/15°
Temperatures
13 km/h
Avg max wind
55 %
Avg humidity
Portland in August average weather
Move between months or click on a day
| 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° |
You can click on date
Access Portland weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during August in Portland
See the weather trend as well as the moving average line
August weather day by day
Click on a date for more information
| 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 | |
| Next | |||||
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 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 ☀️
Quick links
You are here
Where is Portland?Get accurate weather forecasts for Portland, located at latitude 45.523 and longitude -122.676. Stay updated with localized weather information tailored for Portland.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.