Seattle weather
Ten-year climate averages, month by month
Seattle in august
Current month averages, based on ten years of records. 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 ten years of records below 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 august
Seattle weather — FAQ
Q01When is the best time to visit Seattle?
When is the best time to visit Seattle?
The best months to visit Seattle are May, June, July, August. Ten-year daily records show these months hold the most stable mix of temperature, rainfall and sunshine.
Q02What is the hottest month in Seattle?
What is the hottest month in Seattle?
August runs the highest averages in Seattle, with typical daytime highs of 26°C (78°F). Plan around midday and consider accommodation with reliable cooling.
Q03What is the coldest month in Seattle?
What is the coldest month in Seattle?
December brings the lowest averages, with daytime highs near 8°C (46°F). Layer up and expect shorter daylight hours if you plan sightseeing.
Q04Which month has the most rain in Seattle?
Which month has the most rain in Seattle?
December typically records the highest monthly rainfall — around 193mm on average. Plan indoor alternatives and pack proper rain gear if visiting this month.
Q05What is the climate like in Seattle?
What is the climate like in Seattle?
Seattle, United States has mild summers, cold winters, moderate seasonal rainfall. You can read the detailed month-by-month breakdown on this page.