Seattle Weather in March
March in Seattle brings low temperatures around 12°C (54°F) during the day, dropping to 4°C (39°F) at night, with quite a bit of rainfall expected, averaging around 124 mm (4.9 in) for the month.
Rainfall in Seattle in March
You can expect rain on roughly 21 days based on historical data, averaging 124 mm (4.9 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Seattle in March
In March, Seattle sees low temperatures, with highs of 12°C (54°F). Nights drop to around 4°C (39°F). Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Seattle in March
The month experiences a moderate amount of sunlight, with 179 hours of sunshine. This provides a nice balance between sunshine and clouds.
Wind Speed in Seattle in March
Average wind conditions reach 5 m/s (10 knots) in March. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.March in Seattle can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, 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 Seattle's climate page.
Seattle 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%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seattle typically stay consistent throughout March, with daily highs averaging around 12°C (54°F). Nights are cold, with lows around 4°C (39°F).
Average temperatures in March
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in March
Historical weather for Seattle in March
Browse day-by-day weather records for Seattle spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seattle historical weather extremes in March
The extremes listed below come from historical weather data collected in Seattle from 1976 through 2026.
- The hottest March day on record in Seattle reached 26°C (79°F) (March 20, 2019).
- The coldest March day was on March 2, 1989, with a maximum of 0°C (32°F).
- The lowest overnight temperature recorded in March was -6°C (21°F) (March 3, 1989).
- Peak precipitation in March occurred on March 15, 2015, when 55 mm (2.2 in) of precipitation was measured.
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 →
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What to Wear in Seattle in March
Pack for changing conditions in Seattle in March. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Seattle 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 Seattle's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Seattle climate overview or explore weather in the United States of America.
