Portland in October
October is right in the heart of spring for Portland, and the weather has a definite personality this time of year.
Expect the mercury to hit around 17.7 degrees during the day and settle at 10.4 degrees after dark. The temperature stays pretty consistent through the day. It's cool but manageable. A jumper handles most of it.
October's temperature is very close to the annual average for Portland.
The rain data says 68mm over 12 days. Moderate, often falling in a few good dumps rather than constant drizzle.
Sunshine-wise, October delivers around 19.1 MJ/m2 of daily solar radiation. UV sits in the very high category. You'll want SPF 50+ and a decent hat.
The Comfort Score is 5.6/10 for October. It's fine, but not the highlight of the calendar.
Packing tip: bring layers you can peel on and off, waterproof gear, and serious sun protection.
Scroll down for the detailed climate data, or explore what nearby cities are like in October.
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
- A jumper or light cardigan for flexibility
- 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 |