Month-by-month travel weather
Portland December weather
Portland, United States · December
Staying dry is the main comfort strategy
December is frequently rainy and cloudy. Even mild temperatures can feel chilly when you’re damp and in wind.
If you plan indoor anchors well, you can keep days comfortable even when it’s wet outside.
December averages at a glance
Average low
around 2–5°C
Average high
around 8–11°C
Average precipitation
around 120–170 mm
Rainy days
about 16–20 days
What to wear in December in Portland
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Rain-ready outer layer + layers works well.
- • A hood/hat helps with wind and drizzle.
- • Keeping feet dry improves comfort a lot.
Travel tips for visiting Portland in December
- • Assume rain is possible most days and plan routes accordingly.
- • Use cafés/markets/museums as mid-day resets.
December weather in Portland — FAQ
Q. Is December very cold?
A. Usually mild by numbers, but damp wind can feel cold—rain gear matters.
Q. Is it gray all day?
A. It can be, though there are occasional bright breaks.
Explore Portland
These pages are connected so you can compare conditions and decide for yourself.