Seattle, United States skyline

Seattle Weather in March

Typical March weather in Seattle, United States, based on 2006–2025 climate averages.

In March, Seattle averages a high of 10.6°C (51.1°F) and a low of 3.3°C (37.9°F), with about 17 rainy days (135 mm of rain) and 7.4 hours of sunshine a day.

Avg high

10.6°C (51.1°F)

Avg low

3.3°C (37.9°F)

Rainfall

135 mm (5.3 in)

Rainy days

17 days

Sunshine

7.4 h / day

Humidity

80%

March vs the rest of the year

Here is how every month in Seattle stacks up against March — the 4th wettest month for rain.

MonthAvg highvs MarchRainRainy days
January7.5°C (45.5°F)−3.1°C (−5.6°F)177 mm18
February8.1°C (46.6°F)−2.5°C (−4.5°F)116 mm15
March10.6°C (51.1°F)—135 mm17
April13.3°C (55.9°F)+2.7°C (+4.9°F)96 mm14
May17.3°C (63.1°F)+6.7°C (+12.1°F)67 mm11
June20.2°C (68.4°F)+9.6°C (+17.3°F)52 mm8
July24.4°C (75.9°F)+13.8°C (+24.8°F)17 mm4
August24.3°C (75.7°F)+13.7°C (+24.7°F)29 mm5
September20.6°C (69.1°F)+10°C (+18°F)66 mm9
October14.7°C (58.5°F)+4.1°C (+7.4°F)126 mm14
November9.9°C (49.8°F)−0.7°C (−1.3°F)191 mm18
December6.9°C (44.4°F)−3.7°C (−6.7°F)179 mm18

What March feels like in Seattle

March is early spring in Seattle. The daytime air has a chill to it, though it is rarely bitter. The gap between afternoon and night is small, so nights are cold and the temperature hardly changes after dark. Moisture in the air gives the cold a damp edge.

Rain in Seattle in March

March is persistently wet here: some rain falls on about every other day. Each rainy day adds about 7.9 mm (0.3 in), a proper wetting rather than a sprinkle. That is close to Seattle's typical rain per wet day for the whole year (about 8.3 mm).

Daylight and sunshine in March

In mid-March, sunrise is at about 7:25 am and sunset at about 7:13 pm (local time) — 11 h 49 min of daylight. Since mid-February the day has gained 1 h 35 min. The sun is out for roughly 63% of those daylight hours, so there are plenty of bright spells.

How March compares to the rest of the year

March is the 5th coolest month of the year in Seattle. Afternoons run 2.5°C (4.5°F) warmer than in February, with 18 mm more rain. Temperatures keep climbing into April. The next month's average high: 13.3°C (55.9°F).

Who March suits

  • Sightseeing: less ideal — rain falls on more than half the days.
  • Parks & outdoor: less ideal — too cool to sit outside for long.
  • Beach: less ideal — the sea air is too cool.
  • Hiking: less ideal — trails are cool.
  • Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.

Tips for visiting Seattle in March

Rain Protection

A compact umbrella and a light waterproof jacket.

Warm Layers

A warm jacket, a hat and gloves for cold mornings and evenings.

Sunglasses

Plenty of sun, so bring sunglasses and a cap.

Quick questions

How warm is Seattle in March?

It feels chilly: typical highs are 10.6°C (51.1°F), with lows near 3.3°C (37.9°F).

Does it rain a lot in Seattle in March?

It does: about 17 rainy days bring roughly 135 mm, so plan some indoor options.

What should I wear in Seattle in March?

Based on the averages: rain protection, warm layers and sunglasses. There is little need to change for the evening.

Is March or April better for visiting Seattle?

April, clearly: it ranks #6 of 12 among Seattle's months, against #9 for the other. April is warmer and has fewer rainy days.

Is March a good time to visit Seattle?

Poor

Poor — chilly days, rain on most days (about 17). Within Seattle's own year, March ranks #9 of 12.

March in other United States cities

Warmer or drier places in March

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Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Seattle weather by month.