Seattle (WA) Rainfall by Month – Average Precipitation Seattle experiences significant rain snowfall throughout the year, averaging 1009 mm of precipitation annually However, this abundant rainfall is not evenly distributed, with a distinct dry season during certain months You can clearly see this in our monthly precipitation graphs below
How Rainy Is Seattle? Its Not Even in the Top 30 of Major U. S. Cities At 37 7 inches of precipitation annually, Seattle ranks 32nd among the nation's 50 largest cities Notice that most of the cities with more rainfall are located east of the Mississippi River, as shown in the map below made by climatologist Brian Brettschneider
Rain Stats - Seattle Weather Blog Seattle averages 39 34 inches of precipitation a year, with the vast majority falling as rain instead of snow Official precipitation totals for the city are measured at Sea-Tac Airport, which is actually located south of the Seattle city limits
Total Precipitation - Seattle Climate Data Analyze Seattle's precipitation patterns and trends from 1978 to present View monthly and yearly rainfall data, historical precipitation records, and climate change effects on Seattle's weather patterns
Yearly Monthly weather - Seattle, WA Remarkably, despite being in a region known for its rainfall, the city observes just under nine days of rainfall on average per month, with the highest frequency in November at 9 1 days and the lowest in August at 2 8 days
National Weather Service R INDICATES RECORD WAS SET OR TIED MM INDICATES DATA IS MISSING T INDICATES TRACE AMOUNT
Seattle Precipitation Humidity by Month | Rain Snow Averages This chart shows the monthly average precipitation in Seattle, United States, based on ERA5 data spanning 2000 to 2025 The stacked bars represent total precipitation distributed between rain and snow
Climate of Seattle - Wikipedia In an average year, at least 0 01 inches (0 25 mm) of precipitation falls on 150 days, more than nearly all U S cities east of the Rocky Mountains