United States Seattle Weather in March — Climate Guide
March in Seattle is Improving
Seattle Weather in March — Quick Answer
As of 2026- Avg temp
- 12° / 5°
- Rainfall
- 100mm · 16 days
- Crowds
- Moderate
As of 2026, Seattle in March averages a high of 12°C and low of 5°C with 100mm of rain over about 16 days. Early spring — high 12°C, low 5°C. Light waterproof jacket + sweater. First cherry blossoms begin late month at University of Washington.
March is Improving for Seattle.
March is shoulder season — improving weather + hotel rates still 25% below summer peak. **University of Washington Quad cherry blossoms** (mid-late March) is Seattle's defining spring spectacle — free, walk-in. First clear-sky days return; the city starts to come alive.
Travel score
Seattle March Weather Stats
Avg High
12°C
Avg Low
5°C
Rainy Days
16
100mm total
Sunshine
4h
Daily avg
Humidity
75%
Damp + cool
UV Index
3
Moderate
Wind
14 km/h
Gusts 30
Sea Temp
8°C
Avg water temp
Crowds
Moderate
At attractions
March Sunrise & Sunset
Air Quality
PM2.5
10 μg/m³
PM10
20 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
11°C
Nighttime
4°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 30 km/h
Activities Recommended for March
March Travel Pros & Cons
Pros
- UW Cherry Blossoms (defining spring event)
- Weather improves (12/5°C)
- Hotel rates moderate
Cons
- Still rainy (16 days)
- Cherry blossom crowds at UW
March Events & Festivals
- UW Cherry Blossoms (mid-late March)
- Daylight Saving begins (clocks forward 1h)
Seattle in March — Full Picture
March is shoulder season — improving weather + hotel rates still 25% below summer peak. **University of Washington Quad cherry blossoms** (mid-late March) is Seattle's defining spring spectacle — free, walk-in. First clear-sky days return; the city starts to come alive.
What to Wear & What to Pack
Early spring — high 12°C, low 5°C. Light waterproof jacket + sweater. First cherry blossoms begin late month at University of Washington.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current14.3°C
6.7°C
13.3/mo
Summer (Jun·Jul·Aug)
22.7°C
12.3°C
5/mo
Autumn (Sep·Oct·Nov)
15.7°C
8°C
13/mo
Winter (Dec·Jan·Feb)
8.7°C
3.3°C
17.3/mo
Seattle Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 3° | 18d·145mm | 2h | 80% | 1 | Quiet | Low season | |
| 10° | 4° | 16d·110mm | 3h | 78% | 2 | Quiet | Low season | |
| 12° | 5° | 16d·100mm | 4h | 75% | 3 | Moderate | Shoulder | |
| 14° | 6° | 14d·80mm | 5h | 72% | 4 | Moderate | Shoulder | |
| May (Best) | 17° | 9° | 10d·50mm | 7h | 70% | 6 | Busy | Shoulder |
| June (Best) | 20° | 11° | 8d·38mm | 8h | 68% | 7 | Very busy | Peak |
| July (peak month) (Best) | 24° | 13° | 3d·18mm | 10h | 65% | 8 | Very busy | Peak |
| August (Best) | 24° | 13° | 4d·22mm | 9h | 67% | 7 | Very busy | Peak |
| 21° | 11° | 7d·38mm | 7h | 70% | 5 | Busy | Shoulder | |
| 15° | 8° | 13d·90mm | 4h | 75% | 3 | Moderate | Shoulder | |
| 11° | 5° | 19d·175mm | 2h | 80% | 1 | Quiet | Low season | |
| 8° | 3° | 18d·145mm | 2h | 80% | 1 | Busy | Peak |
View Other Months
Seattle March Hotel Picks
Frequently Asked Questions
Is March a good time to visit Seattle?
Seattle in March is Improving. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Seattle in March?
Seattle March averages a high of 12°C and a low of 5°C.
Does it rain much in Seattle in March?
Seattle March averages 100mm of rainfall over about 16 rainy days.
What should I wear in Seattle in March?
Early spring — high 12°C, low 5°C. Light waterproof jacket + sweater. First cherry blossoms begin late month at University of Washington.
What time are sunrise and sunset in Seattle in March?
Seattle March sunrise is 07:20 and sunset is 19:25, with 12h 05m of daylight.
What's the air quality like in Seattle in March?
Seattle March air quality (AQI) averages 35, rated Good. PM2.5 averages 10μg/m³.
What activities are recommended in Seattle in March?
In March, Seattle is great for UW Cherry Blossoms (Quad), Pike Place, Museums.
Is March peak season in Seattle?
Seattle March crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Seattle
View Other Months
Planning a March trip to Seattle?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.