Portland Weather in September

During September, Portland experiences high daytime temperatures of 23°C (73°F) and cooler nights around 11°C (52°F). Expect quite a bit of rainfall. Around 74 mm (2.9 in) is typical.

Rainfall in Portland in September

Past climate data indicates that roughly 10 days will see rain, totalling around 74 mm (2.9 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Portland in September

September is one of the better months to visit Portland. Expect 23°C (73°F) during the day and 11°C (52°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Portland in September

There are approximately 217 hours of sunshine this month, resulting in mostly clear days.

If your ideal day consists of dry skies and pleasant temperatures, June, July and September typically offer the best circumstances for Portland.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

Portland Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 33%  

Precipitation 74 mm (2.9 in)  

Rainy days 10 days  

Humidity 76% *  

Sunshine 217 hours *  

Percentage Sunshine 58% *  

* Data from: Lansing, the United States of America (32 KM, 19 Miles).

What to Wear in Portland in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Portland in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

More climate data for Portland

Temperature Rainfall Sunshine Humidity

See the full Portland climate overview or explore weather in the United States of America.