Average temperatures, rainfall and packing tips for Seattle, United States in March
March in Seattle is typically cool, with average daytime highs around 11°C and nights near 4°C. Temperature-wise it sits mid-range for Seattle (the 8th warmest month).
March is one of the wetter months in Seattle, with around 87 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Seattle are usually June, July, August and September.
← Seattle weather tomorrow (live)
In March, Seattle averages a daytime high of about 11°C and a night-time low of around 4°C, based on recent historical data.
March is one of the wetter months in Seattle, with around 87 mm of rain - plan around showers.
March is a workable time to visit Seattle, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Seattle are usually June, July, August and September.