Seattle weather in March
March in Seattle: cold, rainy, with clean air — a good time to visit.
#8 of 12 months in Seattle · #444 of 604 destinations to visit in March · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Seattle climate normals — March
| Daytime high | 11°C / 52°F | 🧥 cold |
|---|---|---|
| Nighttime low | 2°C / 36°F | |
| Feels like (high) | 8°C / 46°F | |
| Rainfall | 97 mm / 3.8 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 3°C / 37°F | |
| Sunshine | 8.1 h/day | |
| Daylight | 11.9 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 1.5 cm / 0.6 in | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Seattle in March — FAQ
- Is March a good time to visit Seattle?
- March in Seattle: cold, rainy, with clean air — a good time to visit. It ranks #8 of 12 months for Seattle on SeasonMap's comfort score (68/100).
- What is the weather like in Seattle in March?
- In March, Seattle averages a daily high of 11°C and a low of 2.2°C, with about 97 mm of rain over roughly 15.4 rainy days.
- What is the air quality in Seattle in March?
- Seattle has a mean US Air Quality Index of about 44 in March.
- Does it snow in Seattle in March?
- Seattle sees roughly 1.5 cm of snowfall in March.