March in Seattle brings low temperatures around 12°C during the day, dropping to 4°C at night, with quite a bit of rainfall expected, averaging around 124 mm for the month.

March marks the beginning of spring in Seattle, with temperatures ranging from 39°F to 54°F (4°C to 12°C). Days continue to lengthen, with around 12 hours of daylight. While rain showers are still …

Seattle's March 2026 forecast shows daily high temperatures ranging from 55° to 62°, with overnight lows between 41° and 47°. The average high for March is 58° with an average low of 44°.

In Seattle during March average daily high temperatures increase from 53°F to 57°F and it is overcast or mostly cloudy about 67% of the time.

This page gives detailed information on the typical March temperature, precipitation, sun, humidity, wind and storms for Seattle. The weather measurements are averages based on climate data gathered at …

Oct 31, 2025 · The chart illustrates March temperature patterns in Seattle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the …

Weather.com brings you the most accurate monthly weather forecast for Seattle, Washington with average/record and high/low temperatures, precipitation and more.

March weather in Seattle, Washington: average high 54°F, low 39.7°F, 3.64" rainfall.

The average daily temperature expected in Seattle in this month is 12°C (54°F), dropping to an average temperature of 3°C (37°F). Seattle sees up to 5 hours of sunshine per day throughout the month.

Averages and records for weather in Seattle, Washington in the month of March.