Verdict: Fair month
Seattle Weather in March
March is mild-to-cool in Seattle, topping out near 10°C (50°F) — comfortable with a layer on. Expect showers on roughly 14 days of the month — rarely trip-ruining, worth planning around. March is workable in Seattle if your dates are fixed — just plan around the conditions.
Average high
10°C / 50°F
Average low
3°C / 37°F
Rain days
~14
Precipitation
84 mm
What to pack for Seattle in March
- A proper warm jacket, and a hat for mornings
- Rain gear is non-negotiable — expect rain on roughly 14 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
March against the rest of the year
Warmest in Seattle: Jul (25°C / 77°F) · Coolest: Jan (8°C / 46°F) · Wettest: Jan (~20 rain days)
8°
3°
Jan
8°
3°
Feb
10°
3°
Mar
13°
5°
Apr
17°
9°
May
21°
12°
Jun
25°
15°
Jul
25°
15°
Aug
21°
13°
Sep
15°
9°
Oct
10°
5°
Nov
8°
3°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)