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
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
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 In November, Seattle averages more rainfall than any other U S city of more than 250,000 people; it also ranks highly in winter precipitation
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
National Weather Service 069 CXUS56 KSEW 011036 CLMSEW CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 336 AM PDT FRI MAY 01 2026 THE SEATTLE WA WFO
Seattle, WA - ClimateStations. com Graphical Climatology of Seattle: Daily Temperatures and Rainfall, by Year (1945 – Present) The following is a graphical climatology of Seattle, Washington (Seattle-Tacoma Int’l Airport) temperatures, precipitation, and various other parameters, from 1945 into 2026