What the weather in metro Seattle actually is, rather than what it will do this week — the normal high and low for every month, how much rain and snow to expect, the hottest and coldest readings ever taken here, and the warmest, coldest, wettest and driest years since 1895.
Monthly normals are NOAA/NCEI nClimGrid area averages for the recent period. The annual series behind the warmest/coldest/wettest/driest years is NOAA’s Climate at a Glance, 1895 onward. Records are the all-time extremes in the nClimGrid-Daily series. Snow is the NOAA NOHRSC analysis, its own shorter record. Everything here is county-resolution — nClimGrid, PRISM and Climate at a Glance all publish to the county and no finer — so a figure for a town is the figure for the county around it, and area figures are the mean across this area’s counties.