Portland weather in September (Oregon, United States of America)

What can you expect from the weather in Portland during September? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.

In Portland the weather in September is generally perfect, characterized by high temperatures and moderate rainfall. September is a summer month. Daytime temperatures hover around 24°C, while nights can cool down to about 12°C.

Portland in September usually receives moderate rainfall, averaging around 41 mm for the month. Typically around 8 days of rainfall is expected.

The days are predominantly sunny, with an estimated total of around 236 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Portland. May, June, July, August and September typically offer the most agreeable circumstances. On the other hand, January, March, November and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Portland climate page with graphs.

 

Portland, monthly averages in September

Min TemperatureMin Temperature 12°C  
Max TemperatureMax Temperature 24°C  
Chance of RainChance of Rain 27%  
PrecipitationPrecipitation 41 mm  
Rainy daysRainy days 8 days  
HumidityHumidity 69%  
WindspeedWindspeed 7 km/h  
SunshineSunshine 236 hours  
Percentage SunshinePercentage Sunshine  

Where to go in the United States of America in September

Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Portland in September?

For visitors traveling to Portland, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
10/10
Cycling
10/10
Walking
10/10
Barbeque
9/10
Camping
10/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Portland.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.