Portland in October
October in Portland is peak spring, and the weather reflects it. You're looking at average daily highs of 17.7 degrees.
The average daily maximum is 17.7 degrees with overnight lows of 10.4 degrees. Manageable with a decent layer, and you'll warm up by midday.
October's temperature is very close to the annual average for Portland.
Rainfall in October averages 68mm over about 12 days. That means roughly a 40% chance of rain on any given day, pack a compact umbrella just in case.
Solar exposure averages 19.1 MJ/m2 per day in October, with UV levels in the very high range. You'll want SPF 50+ and a decent hat.
At 5.6/10 on the Comfort Score, October is middle of the road.
For your suitcase: a decent jumper or fleece, a rain jacket or compact umbrella, and SPF 50+ sunscreen and a hat.
Check the data table below for the full picture, or compare Portland in October with another destination.
October at a Glance
Temperature Range
Daily temperature range in October. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Layered clothing for mild to cool conditions
- A waterproof jacket or compact umbrella
- Sunscreen (SPF 30+) and sunglasses for UV protection
Coming From Overseas?
How October in Portland stacks up against major cities around the world.
About 2 degrees warmer and considerably drier.
About 1 degrees cooler and considerably drier.
About 4 degrees cooler and considerably drier.
How October Compares
Portland's monthly climate at a glance. October is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 21.2 | 14.6 | 71mm | 8.2 |
| Feb | 22.2 | 13.5 | 5mm | 10.0 |
| Mar | 21.9 | 13.7 | 14mm | 9.2 |
| Apr | 16.9 | 11.3 | 54mm | 4.0 |
| May | 15.9 | 9.7 | 23mm | 3.5 |
| Jun | 13.2 | 7.6 | 37mm | 1.5 |
| Jul | 13.0 | 7.4 | 84mm | 1.0 |
| Aug | 16.2 | 9.4 | 70mm | 3.4 |
| Sep | 14.8 | 10.0 | 90mm | 2.3 |
| Oct | 17.7 | 10.4 | 68mm | 5.6 |
| Nov | 19.8 | 12.0 | 91mm | 7.1 |
| Dec | 21.5 | 13.2 | 41mm | 9.1 |