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United States weather

Weather in Seattle, Washington for December 2025

Your guide to Seattle weather in December - trends and predictions

    Snow Forecast ❄️

  • Seattle typically experiences moderate snowfall in December, with an average of 8 snowy days.
    According to Seattle snow forecast for December 2025, 3 snowy days are expected in the next 2 weeks. The closest date with snow is Monday, December 22.

    • Temperatures

  • So far, December 2025 in Seattle is slightly warmer than the historical average by 1.5 °F.

  • Expect cooler weather in the next days in Seattle with the forecast suggesting a temperature of 5.8 °F, lower than the historical average.

  • In general, the average temperature in Seattle at the beginning of December is 7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 5 °F by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
0
Dry days
Average rainy days
23
Rainy days
Average snowy days
8
Snow days
Average temperatures
6°/2°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
86 %
Avg humidity

Seattle Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
6°
2
Heavy rain at times
7°
3
Overcast
6°
4
Moderate rain at times
6°
5
Overcast
8°
6
Overcast
8°
7
Overcast
8°
8
Heavy rain at times
9°
9
Moderate rain
7°
10
Moderate rain at times
7°
11
Moderate or heavy rain shower
9°
12
Mist
7°
13
Heavy rain at times
8°
14
Patchy rain possible
11°
15
Patchy rain possible
13°
16
Heavy rain
12°
17
Moderate rain
7°
18
Moderate rain
7°
19
Patchy rain possible
5°
20
Patchy rain possible
5°
21
Moderate rain
5°
22
Patchy rain possible
4°
23
Partly cloudy
1°
24
Cloudy
1°
25
Moderate snow
1°
26
Cloudy
3°
27
Moderate rain at times
5°
28
Patchy rain possible
7°
29
Patchy rain possible
5°
30
Moderate or heavy rain shower
7°
31
Heavy rain at times
7°

Temperatures trend during December in Seattle

See the weather trend as well as the moving average line

December weather in Seattle day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Patchy rain possible
Patchy rain possible
 6° /1° 2.8 mm 0 cm
Dec. 2 Heavy rain at times
Heavy rain at times
 7° /1° 5.1 mm 0.3 cm
Dec. 3 Overcast
Overcast
 6° /1° 2.5 mm 0.8 cm
Dec. 4 Moderate rain at times
Moderate rain at times
 6° /0° 13.2 mm 0 cm
Dec. 5 Overcast
Overcast
 8° /2° 12.5 mm 0 cm
Dec. 6 Overcast
Overcast
 8° /4° 6.2 mm 0 cm
Dec. 7 Overcast
Overcast
 8° /5° 12.5 mm 0 cm
Dec. 8 Heavy rain at times
Heavy rain at times
 9° /4° 10.4 mm 0 cm
Dec. 9 Moderate rain
Moderate rain
 7° /3° 14.8 mm 0 cm
Dec. 10 Moderate rain at times
Moderate rain at times
 7° /2° 12.3 mm 0 cm
Dec. 11 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /4° 5.9 mm 0 cm
Dec. 12 Mist
Mist
 7° /3° 0.8 mm 0 cm
Dec. 13 Heavy rain at times
Heavy rain at times
 8° /3° 4.3 mm 0 cm
Dec. 14 Patchy rain possible
Patchy rain possible
 11° /8° 0.8 mm 0 cm
Dec. 15 Patchy rain possible
Patchy rain possible
 13° /9° 4.3 mm 0 cm
Dec. 16 Heavy rain
Heavy rain
 12° /9° 39 mm 0 cm
Dec. 17 Moderate rain
Moderate rain
 7° /5° 8.3 mm 0 cm
Dec. 18 Moderate rain
Moderate rain
 7° /4° 5.5 mm 0 cm
Dec. 19 Patchy rain possible
Patchy rain possible
 5° /3° 0.2 mm 0 cm
Dec. 20 Patchy rain possible
Patchy rain possible
 5° /3° 1.7 mm 0 cm
Dec. 21 Moderate rain
Moderate rain
 5° /3° 10.1 mm 0 cm
Dec. 22 Patchy rain possible
Patchy rain possible
 4° /1° 2.3 mm 1.7 cm
Dec. 23 Partly cloudy
Partly cloudy
 1° /-2° 0 mm 0 cm
Dec. 24 Cloudy
Cloudy
 1° /-3° 0 mm 0 cm
Dec. 25 Moderate snow
Moderate snow
 1° /-1° 1.5 mm 1.1 cm
Dec. 26 Cloudy
Cloudy
 3° /-2° 0 mm 0 cm
Dec. 27 Moderate rain at times
Moderate rain at times
 5° /1° 8.9 mm 0 cm
Dec. 28 Patchy rain possible
Patchy rain possible
 7° /1° 2.4 mm 0 cm
Dec. 29 Patchy rain possible
Patchy rain possible
 5° /0° 9 mm 0 cm
Dec. 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /2° 9.2 mm 0.7 cm
Dec. 31 Heavy rain at times
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.
Change Month
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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 2°.
How much rainfall should be expected in Seattle during December?
Significant rainfall exceeding 241.9 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 5.797 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 14 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 ❄️
On average, Seattle sees 8 snowy days during December, with approximately 5.8 cm of total snowfall.

December rainfall patterns in Seattle

Explore the daily rainfall trends and prepare for Seattles December weather 💧
Typically, Seattle has 23 rainy days in December with a total of 241.9 mm of rainfall.

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Get accurate weather forecasts for Seattle, located at latitude 47.606 and longitude -122.332. Stay updated with localized weather information tailored for Seattle.

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