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Portland weather in September 2025
Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portland in September. Check more long-term weather averages for Portland in September before you book your next holiday to Oregon in 2025/2026.
- 2323°C max day temperature
- 8 hours of sunshine per day
- 88 days with some rainfall
- 99°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 4747 mm of monthly rainfall
- 55 (Moderate) UV index
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Recommended for Oregon
The September weather guide for Oregon (Portland) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Portland in September?
Daytime temperatures usually reach 23°C in Portland in September, falling to 9°C at night.
How sunny is it in Portland in September?
There are normally 8 hours of bright sunshine each day in Portland in September - that's 64% of daylight hours.
Does it rain in Portland in September?
There are usually 8 days with some rain in Portland in September and the average monthly rainfall is 47mm.
Portland September sunrise & sunset times
Browse the sunrise and sunset times for Portland in September 2025. Select a month to view Portland sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:33 | 18:48 |
Monday, 15th September 2025 | 05:50 | 18:21 |
Tuesday, 30th September 2025 | 06:08 | 17:52 |
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