Seattle's reputation for endless rain is partly true and partly slander. The city sees rain on roughly 150 days a year, which is a lot, but the annual total is lower than Boston or Houston because each rain event tends to be light and brief. Summers from late June through early September are famously dry and mild, with low humidity and long evenings. Winters are gray and cool rather than cold; snow falls a few days a year and rarely sticks for long. The Olympic rain shadow keeps the city itself meaningfully drier than the coastal mountains 50 miles west.
Climate and Average Weather Year Round in Seattle
Year-round temperature
In Seattle, the warmest months are June through September, with average daily highs between 71°F and 77°F. The coldest stretch runs December through February, with highs between 48°F and 51°F and overnight lows reaching 36°F.
Rainfall through the year
Rainfall in Seattle averages 3.0 in per month over the long run. November is the wettest at 5.8 in, while July is the driest at 0.6 in.
Days at 90 °F or hotter
Seattle averages 4.0 days per year at 90 °F or hotter. The hottest year on record saw 12 such days (2015); the coolest just 1 (2001).
Precipitation this year
As of May 28, Seattle has received 10.0 in of precipitation this year — 43% below the long-term normal for this point in the year (17.5 in).