December · United States
Best time to visit Seattle in December Weather, crowds & prices
Weather in Seattle in December
Average temperature 5°C, 222 mm of rain, about 0 days with 6+ hours of sunshine and 93% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
2.3/10
Ranked #12 of 12 months
- Avg temp
- 5°C
- Rainfall
- 222 mm
- Humidity
- 93%
- Days with 6h+ sun
- 0
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Seattle scores 2.3/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 5°C, 222 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Ferry views, coffee culture, and evergreen trails peak in clearer May-September weather.
December in Seattle: expect compromises
December averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
222 mm of rain puts this in monsoon territory — almost no days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 2.3/10 here, 12th of 12 months, against 9.6/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? July scores 7.3 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Seattle in December?
- In December, Seattle averages 5°C, 222 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 2.3/10.
- Is December a good time to visit Seattle?
- December earns a 2.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Seattle in December?
- Expect about 222 mm of rain in December. Average humidity is 93% and there are about 0 days with 6+ hours of sunshine.
Curated in Seattle
Tickets & experiences
Things to do in Seattle
Seattle, United States. Live activities and tours from GetYourGuide, matched to this destination.