Seattle
December
Weather in Seattle for December 2025
Your guide to Seattle weather in December - trends and predictions
Seattle typically experiences moderate snowfall in December, with an average of 8 snowy days.
In general, the average temperature in Seattle at the beginning of December is 6.9 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 6.4 °F by the end of December.
New! Chat with our AI weatherman - it’s amazing and free.
Snow Forecast ❄️
Temperatures
More
0
Dry days
23
Rainy days
8
Snow days
6°/1°
Temperatures
13 km/h
Avg max wind
86 %
Avg humidity
Seattle in December average weather
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  7° | 2  7° | 3  6° | 4  6° | 5 7° | 6 7° | |
| 7 8° | 8 8° | 9 5° | 10 6° | 11 8° | 12  6° | 13 7° |
| 14 7° | 15 7° | 16 7° | 17 8° | 18 8° | 19 7° | 20 8° |
| 21 7° | 22 5° | 23  6° | 24 6° | 25 6° | 26 8° | 27 5° |
| 28 7° | 29 5° | 30 7° | 31 7° |
You can click on date
Access Seattle weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in Seattle
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Patchy rain possible | 7° /1° | 3.1 mm | 0 cm | |
| Dec. 2 | Heavy rain at times | 7° /1° | 6.4 mm | 0.3 cm | |
| Dec. 3 | Overcast | 6° /0° | 3.1 mm | 1 cm | |
| Dec. 4 | Moderate rain at times | 6° /-1° | 7.1 mm | 0 cm | |
| Dec. 5 | Overcast | 7° /1° | 12.5 mm | 0 cm | |
| Dec. 6 | Heavy rain at times | 7° /3° | 7.8 mm | 0 cm | |
| Dec. 7 | Patchy rain possible | 8° /4° | 15.6 mm | 0 cm | |
| Dec. 8 | Heavy rain at times | 8° /3° | 4.6 mm | 0 cm | |
| Dec. 9 | Moderate rain at times | 5° /1° | 9.8 mm | 0 cm | |
| Dec. 10 | Moderate rain at times | 6° /0° | 7.2 mm | 0 cm | |
| Dec. 11 | Moderate or heavy rain shower | 8° /3° | 6.4 mm | 0 cm | |
| Dec. 12 | Cloudy | 6° /2° | 1 mm | 0 cm | |
| Dec. 13 | Heavy rain at times | 7° /1° | 5.2 mm | 0 cm | |
| Dec. 14 | Patchy rain possible | 7° /2° | 3.8 mm | 0 cm | |
| Dec. 15 | Overcast | 7° /2° | 2.8 mm | 0 cm | |
| Dec. 16 | Moderate or heavy rain shower | 7° /2° | 8.4 mm | 0 cm | |
| Dec. 17 | Moderate rain at times | 8° /2° | 3.1 mm | 0 cm | |
| Dec. 18 | Moderate or heavy rain shower | 8° /3° | 15.2 mm | 0.3 cm | |
| Dec. 19 | Moderate or heavy rain shower | 7° /3° | 10.4 mm | 0 cm | |
| Dec. 20 | Overcast | 8° /3° | 4.1 mm | 0.3 cm | |
| Dec. 21 | Overcast | 7° /1° | 13.8 mm | 0.1 cm | |
| Dec. 22 | Moderate or heavy rain shower | 5° /1° | 9.3 mm | 0 cm | |
| Dec. 23 | Partly cloudy | 6° /0° | 6.8 mm | 2.1 cm | |
| Dec. 24 | Moderate or heavy rain shower | 6° /1° | 9 mm | 0 cm | |
| Dec. 25 | Patchy rain possible | 6° /2° | 12 mm | 0.1 cm | |
| Dec. 26 | Moderate rain at times | 8° /2° | 21.1 mm | 0.9 cm | |
| Dec. 27 | Moderate rain at times | 5° /1° | 8.9 mm | 0 cm | |
| Dec. 28 | Patchy rain possible | 7° /1° | 2.4 mm | 0 cm | |
| Dec. 29 | Patchy rain possible | 5° /0° | 9 mm | 0 cm | |
| Dec. 30 | Moderate or heavy rain shower | 7° /2° | 9.2 mm | 0.7 cm | |
| Dec. 31 | Heavy rain at times | 7° /1° | 3.1 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for Seattle in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Seattle forecast closer to your planned date for the most up-to-date weather information.
Seattle in December - FAQ
What are the expected maximum and minimum temperatures in Seattle during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.
How much rainfall should be expected in Seattle during December?
Significant rainfall exceeding 209.6 mm is expected in Seattle during December, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Seattle in December 2025?
Seattle experiences an average snowfall of 6.9075 cm during December, occurring over 8 days.
What are the typical wind conditions in Seattle during December?
The average wind speed in Seattle during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
Seattle snow forecast December 2025
Track daily snowfall levels and discover Seattle’s snowy potential this December ❄️
December rainfall patterns in Seattle
Explore the daily rainfall trends and prepare for Seattles December weather 💧
Quick links
You are here
Where is Seattle?Get accurate weather forecasts for Seattle, located at latitude 47.606 and longitude -122.332. Stay updated with localized weather information tailored for Seattle.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.