Seattle weather
11-year climate averages (2015–2025), month by month
Seattle in october
Current month averages, based on 11 complete years of records (2015–2025). Read the full guide →
Seattle sits at 47°36′N 122°19′W in United States, in North America. Its climate profile is shaped by these coordinates — and the 11 complete years of records below (2015–2025) reveal exactly how each season feels on the ground.
Below, you'll find monthly averages for temperature, rainfall and sunshine, drawn from the Open-Meteo Archive. Every month links to a full guide with what to pack, where to stay, and when to arrive.
The year in weather
Seattle weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for Seattle.
Places that feel like Seattle in october
Seattle weather — FAQ
Q01Which months are best for visiting Seattle?
Which months are best for visiting Seattle?
The best months to visit Seattle are May, June, July, August. July through mid-September is the 'dry season' when Rainier finally shows itself daily and the Bumbershoot festival takes over Seattle Center.
Q02Which month is warmest in Seattle?
Which month is warmest in Seattle?
August runs the highest averages in Seattle, with typical daytime highs of 26°C (78°F). August heat domes hit 35C and 40% of homes lack AC; locals sleep in basements or drive to Alki Beach where the Sound stays 12C year-round.
Q03Which month is chilliest in Seattle?
Which month is chilliest in Seattle?
December brings the lowest averages, with daytime highs near 8°C (46°F). January isn't cold at 5C but the low ceiling and 4:30pm sunset drive locals to SAD lamps; the Chihuly garden is the warmest indoor color hit.
Q04When is the rainy season in Seattle?
When is the rainy season in Seattle?
December typically records the highest monthly rainfall — around 193mm on average. November atmospheric rivers dump three inches in 24 hours; the Duwamish floods Georgetown and Highway 99 tunnel entrances close.
Q05How would you describe Seattle's weather?
How would you describe Seattle's weather?
Seattle, United States has mild summers, cold winters, moderate seasonal rainfall. The Freeze is real — locals will smile at you at Trader Joe's and never invite you anywhere. The correct coffee order is a 'cortado' at Milstead or Elm, not a Starbucks anything. Ballard is where Norwegians settled and where the salmon locks let you watch chinook climb concrete steps every August. Never open an umbrella; it marks you as tourist. Locals wear Gore-Tex hoods and consider anything under a half-inch per hour to be 'not really raining.' You can read the detailed month-by-month breakdown on this page.