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.

Seattle Average Rainfall by Month 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.

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 …

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 …

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 …

4 days ago · Applying the 0.01 -inch standard, Seattle averages approximately 150 to 155 days each year with measurable precipitation. This frequency places Seattle among the US cities with the …

Monthly temperature, precipitation and hours of sunshine. A climate graph showing rainfall, temperatures and normals.

Dec 31, 2025 · Through 2017, the most extreme z-score was -4.95 z, for 15 Nov 1955. The fourth chart down depicts daily rainfall, as high as 5.02 inches (20 Oct 2003), the fifth (when applicable) shows …

Seattle, Washington receives 965.4 mm (38 in) of rainfall per year, or 80.5 mm (3.2 in) per month. On average there are 150 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or …

Seattle, Washington is a city of wet winters and dry summers. The moderate year-round temperatures mean that Seattle rarely sees snow, and yet the city enjoys pleasant summers. This page gives …