Portland Weather in September
United States · 30-year monthly averages
🌟 Great time to visit
September in Portland is pleasantly warm, with average daytime highs around 25°C (77°F) and nighttime lows near 12°C (54°F). Expect roughly 39mm of precipitation spread over about 5 rainy days, with little rainfall.
Avg high
25°C
77°F
Avg low
12°C
54°F
Rainfall
39mm
dry
Rainy days
5
days with ≥1mm
🎒 What to pack
- light layers
- comfortable walking shoes
September vs the rest of the year
FAQ
- How hot is Portland in September?
- September in Portland is pleasantly warm, with average daytime highs around 25°C (77°F) and nighttime lows near 12°C (54°F). Expect roughly 39mm of precipitation spread over about 5 rainy days, with little rainfall.
- Does it rain a lot in Portland in September?
- Portland sees around 39mm of precipitation in September on average — dry by global standards.
- Is September a good time to visit Portland?
- September is one of the best months to visit Portland — comfortable temperatures and manageable rainfall.