Seattle, WA weather
Right now 55°, clear · tonight 54°, fog · seven days from the National Weather Service
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Right now · 55° · clear · calm · 1° warmer than this time yesterday · at Boeing - King, 2:55 AM
Today, in the Weather Service’s words
Areas of fog after 5am. Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. North northeast wind around 3 mph.
Seven days
Winter in Seattle
Seattle averages 4 inches of snow a year, according to NOAA’s 1991-2020 climate normals - a rare snow place. Snow is unusual here. An inch is enough to close schools because almost nothing is set up to clear it.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 4 inches a year is equipped differently from one that never sees any. Here, roughly 1 inches in a single storm is where a normal school day comes under threat.
Upper air over Seattle
The nearest radiosonde launch is Quillayute, about 105 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere - which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.
Sources: National Weather Service forecast and hourly grid for Seattle (api.weather.gov), updated Tue, 3:42 AM UTC. Sunrise and sunset from NOAA’s solar position calculations. Snowfall normals from NOAA’s 1991-2020 US Climate Normals. County lines from the US Census Bureau.