Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Portland Weather in September
September in Portland brings very high temperatures around 32°C (90°F) during the day, dropping to 23°C (73°F) at night, with the most rainfall of the year.
Rainfall in Portland in September
This month sees the most rain, so carrying an umbrella will ensure you stay dry. Typically around 13 days of rainfall are expected, averaging 143 mm (5.6 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Portland in September
In September, Portland sees very high temperatures, with highs of 32°C (90°F). Nights drop to around 23°C (73°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. Nights stay warm at around 23°C (73°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Portland in September
Expect a lot of sunshine this month, with about 246 hours of sun. These sunny conditions add to the overall experience.Our weather planner can help you find worldwide destinations with pleasant weather during this period. February, March, April, October, November and December typically offer the best weather for Portland.
Portland Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
32°C (90°F)
Chance of Rain
43%
Precipitation
143 mm (5.6 in)
Rainy days
13 days
Humidity
75% *
Sunshine
246 hours *
Percentage Sunshine
66% *
* Data from: Corpus Christi, the United States of America (11 KM, 6 Miles).
Portland Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portland - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Portland in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Portland in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Portland 3-Day Forecast
More climate data for Portland
Temperature Rainfall Sunshine Humidity
See the full Portland climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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