Portland in august: average Weather, Temperature and Climate
Weather in Portland in august 2025
The weather in Portland in august comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout august
perfect weather UV index: 6
Weather at 6am
18°C
Clear/Sunny
57% of time
24%
11%
6%
Weather at 12pm
28°C
Clear/Sunny
70% of time
18%
7%
5%
Weather at 6pm
23°C
Clear/Sunny
73% of time
17%
6%
4%
Weather at 3am
15°C
37%
37%
15%
6%
Evolution of daily average temperature and precipitation in Portland in august
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Portland in august.
The climate of Portland in august is perfect
The climate in august in Portland is dry ; it hardly ever rains (20mm of rainfall over 1 days).
The climate nice there august. The high seasonal norm is 29°C. The seasonal minimum is 18°C. Thus, the mean temperature average in august in Portland is 23°C. Note that these seasonal averages are in contrast with those observed in Portland in august with a maximum record of 43°C in 2017 and a minimum record of 9°C in 2021. You can plan to have about 12 days with temperatures over 30°C, or 39 of the month.
Day length in Portland in august is 14:06. Sunrise is at 05:12 and sunset is at 19:18.
With a perfect weather, the month of august is advisable to go in this city.
Seasonal average climate and temperature of Portland in august
Check below seasonal norms These datas are generated from the weather statements earlier years of the month of august.
| August | |||||
| Outside temperature | |||||
| Average temperature | 23°C | ||||
| Highest temperature | 29°C | ||||
| Lowest temperature | 18°C | ||||
| Highest record temperature | 43°C (2017) | ||||
| Lowest record temperature | 9°C (2021) | ||||
| Number of days at +30°C | 12 day(s) (39%) | ||||
| Number of days at +18°C | 31 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 13.8°C | ||||
| Lowest sea temperature | 12.3°C | ||||
| Highest sea temperature | 15.2°C | ||||
| Wind | |||||
| Wind speed | 10km/h | ||||
| Wind temperature | 18°C | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 20mm | ||||
| Number of days with rainfall | 1 day(s) (4%) | ||||
| Record daily rainfall | 27.3mm (2015) | ||||
| Other climate data | |||||
| Humidity | 75% | ||||
| Visibility | 8.96km | ||||
| Cloud cover | 22% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 14 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:12 | ||||
| Time of sunset | 19:18 | ||||
| Length of day | 14:06 | ||||
| Our opinion about the weather in august | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last august?
Here is the day by day recorded weather in Portland in august 2024:
17°C to 35°C
21°C to 34°C
19°C to 29°C
18°C to 33°C
17°C to 32°C
15°C to 30°C
14°C to 31°C
18°C to 32°C
19°C to 31°C
17°C to 31°C
15°C to 29°C
14°C to 25°C
14°C to 26°C
14°C to 27°C
15°C to 26°C
14°C to 26°C
14°C to 30°C
15°C to 25°C
14°C to 25°C
14°C to 24°C
14°C to 23°C
16°C to 22°C
14°C to 17°C
11°C to 14°C
12°C to 24°C
14°C to 27°C
17°C to 23°C
11°C to 23°C
12°C to 30°C
16°C to 32°C
17°C to 34°C
Map: other cities in the United States (USA) in august
Cities near Portland:
| Salem (Oregon) in august | perfect weather |
| Lincoln City (Oregon) in august | perfect weather |
| Long Beach (Washington) in august | good weather |
| Newport (Oregon) in august | perfect weather |
| Ocean Park (Washington) in august | good weather |
| Mount Rainier National Park (Washington) in august | good weather |
| Westport (Washington) in august | good weather |
| Seattle in august | perfect weather |
| Coos Bay in august | good weather |
| Crater Lake (Oregon) in august | good weather |
| La Push (Washington) in august | good weather |
| Boise (Idaho) in august | perfect weather |
Click over cities on the map for information about the weather in august.
perfect weather
good
tolerable
bad
very bad
Weather data for Portland in august:
Weather data for Portland for august are derived from an average of the weather forecast since 2009 in Portland. There is a margin of error and these forecasts are to be considered as general information only. The weather in Portland can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Portland.