Seattle Weather in March
11.5°C high · 3.4°C low · 106 mm rain · 4.5h sun
Mar is a cool month in Seattle — not peak season, but a good time to avoid crowds.
March at a glance
| Metric | Value |
|---|---|
| Average high | 11.5°C |
| Average low | 3.4°C |
| Rainfall | 106 mm |
| Sunshine | 4.5 hours/day |
| Daylight | 11.6 hours |
What to pack in March
Pack a warm coat and layers, plus a raincoat and umbrella for Seattle in March.
Seattle weather by month
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Frequently asked questions
What is the weather in Seattle in March?
Highs of 11.5°C and lows of 3.4°C, with about 106 mm of rain and 4.5 hours of sunshine per day.
Is March a good time to visit Seattle?
Mar is a cool month in Seattle — not peak season, but a good time to avoid crowds.
What to do in Seattle · Best time to visit Seattle
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.