December 11 sees frequent showers in Seattle. Historical data shows a 53% chance of rain, so pack accordingly. Temperatures average 8°C. You'll find plenty of company in Seattle this month as tourism activity remains quite robust.
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Essential Travel Info for Seattle
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
The area code for the City of Seattle is...
Safety
Moderate Safety
GPI: 2.44
Seattle Weather Forecast for December 11
"Rainy & Overcast. Expect average highs of 7.6°C. 53% chance of snow."
What to Wear in Seattle in December
Based on historical data for December 11, Seattle typically experiences temperatures between 3.1°C and 7.6°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 53% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Seattle
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
- Umbrella
Average High
7.6°C
Daytime Peak
Average Low
3.1°C
Nighttime Low
Feels Like
4.7°C
❄️ Slightly colder
Snow Chance
53%
Avg 5.6mm if it snows
Snowfall
0.1 cm
~53% chance
Pressure
1016.4 hPa
High volatility
Seattle Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 95% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
5.4°C
Dry air
Heat Stress
Low
No heat warning
😕 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
Busy
78/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~575
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seattle
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:48
☀️ Noon
12:04
🌇 Sunset
16:19
⏱️ Daylight
8h 30m
Wind Speed
16.9 km/h
Gentle breeze
Sunshine
3.1 hrs
Direct Sun (Cloud-free)
Humidity
86%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Seattle
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Seattle
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Volcanic Activity
Nearest: Mount Rainier
94.3km away
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Seattle on December 11 averages 7.6°C with a 53% precipitation probability. Wedding/Outdoor Event Score: 37/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Seattle Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 4
7.6°C • 40% rain
Score
48
December 5
7.6°C • 39% rain
Score
48
December 6
7.6°C • 41% rain
Score
47
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 11) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seattle Worth Visiting on December 11?
Planning a trip to Seattle on December 11? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 7.6°C with a 53% historical precipitation risk.
✈️ Travel Logistics: Approximately 575 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest December 11 recorded in the last 30 years saw temperatures hit 13.1°C in 2025, while the coldest dropped to -1.2°C in 2017.