SeaTac Weather in March
March in SeaTac brings moderate temperatures, with daytime highs of 12°C (54°F) and nights around 4°C (39°F). Quite a bit of rainfall is expected, around 124 mm (4.9 in), so pack an umbrella.
Rainfall in SeaTac in March
Records from the past 30 years suggest around 21 days of rain, with 124 mm (4.9 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in SeaTac in March
In March, expect moderate temperatures in SeaTac, with highs of 12°C (54°F) and lows of 4°C (39°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in SeaTac in March
With about 179 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.
Wind Speed in SeaTac in March
Wind speeds average 5 m/s (10 knots) during March. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.March in SeaTac has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.
SeaTac Temperature in March
Min Temperature
4°C (39°F)
Max Temperature
12°C (54°F)
Chance of Rain
68%
Precipitation
124 mm (4.9 in)
Rainy days
21 days
Humidity
73% *
Windspeed
5 m/s (10 knots) *
Sunshine
179 hours *
Percentage Sunshine
48% *
Best Places in the United States of America in March
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in March →
perfect weather
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tolerable
unpleasant
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What to Wear in SeaTac in March
The weather can swing between comfortable and chilly in March, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in SeaTac in March
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full SeaTac climate overview or explore weather in the United States of America.
