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 …

Jul 31, 2024 · 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 …

Jan 16, 2019 · 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 …

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 …

R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT.

This page shows the average precipitation (including snowfall) in each month of the year in Seattle, Washington. It is based on NOAA data for the years 1991–2020.

Climate averages for Seattle based on 10 years of historical data. Monthly weather averages for Seattle, United States — temperature, rainfall, sunshine, humidity, sea temperature.

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.

Seattle experiences a warm-summer climate with dry summers and wetter winters. Summers are mild, while winters are cool, bringing moderate precipitation, often as frequent rain or drizzle.

May 15, 2026 · The number that surprises everyone: Seattle averages 39.34 inches of precipitation per year, measured at Sea-Tac Airport, which is the official NOAA reporting station for the city.