March 31 is generally a great time to visit Seattle. While there is a slight chance of rain (32%), showers are usually brief. Expect comfortable 12°C weather. Seattle is seeing high visitor numbers, so iconic spots may be busier than usual.
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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 March 31
"Mild & Comfortable. Expect average highs of 11.8°C. 32% chance of snow."
What to Wear in Seattle in March
Based on historical data for March 31, Seattle typically experiences temperatures between 4°C and 11.8°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 32% 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
11.8°C
Daytime Peak
Average Low
4°C
Nighttime Low
Feels Like
10.9°C
🌤️ Feels accurate
Snow Chance
32%
Avg 2.9mm if it snows
Snowfall
0.1 cm
~32% chance
Pressure
1016.6 hPa
Medium volatility
Seattle Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 38 min to burn
Type III-IV
🟡 57 min to burn
Type V-VI
🟢 95 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
8.1°C
Dry air
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
Busy
75/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~558
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seattle
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:51
☀️ Noon
12:14
🌇 Sunset
18:38
⏱️ Daylight
12h 47m
Wind Speed
14.8 km/h
Gentle breeze
Sunshine
8.8 hrs
Direct Sun (Cloud-free)
Humidity
78%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Seattle
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Seattle
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
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 March 31 averages 11.8°C with a 32% precipitation probability. Wedding/Outdoor Event Score: 71/100."
— 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
Compare Other Cities
Same date (March 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seattle Worth Visiting on March 31?
Planning a trip to Seattle on March 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 11.8°C with a 32% historical precipitation risk.
✈️ Travel Logistics: Approximately 558 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest March 31 recorded in the last 30 years saw temperatures hit 18.8°C in 2016, while the coldest dropped to 1.5°C in 2021.