Tag: Seattle Average Yearly Rainfall
Seattle averages 37.49 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. Regardless, Seattle’s precipitation has been logged there since 1945—with records from 1948 onward now digitized by the National Climatic Data Center. Below are two graphs that, together, show Seattle’s yearly precipitation from 1948 to present. The third chart lists Seattle’s top ten wettest days, with the record-setting rains of Oct. 20, 2003 ranking number one.
Note: Data in all charts from records taken at Sea-Tac Airport.
Here’s to 40 and beyond.
Moderate rain showers hit Sea-Tac Airport earlier this afternoon, lifting the total precipitation observed in Seattle this year above 40 inches—some 2.5 inches higher than the yearly norm, with a month and a day to go. With the rainy pattern that began yesterday expected to remain in place well into next week, we’ll continue to pad our 2012 rainfall stats as the calendar turns to December, possibly reaching 42 inches by the end of next week.
However, as impressively soggy as the year has been—despite the fact that we saw the driest two-and-a-half-month period in Seattle history earlier this year—it’ll take a fairly wet December for 2012 to one-up the 46.99 inches that fell just two years ago.
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The big four-oh is almost here.
The only question: Will Seattle reach 40 inches of rain for the year on Wednesday or Thursday?
Our recent soggy weather—including the record-setting 2.13 inches that drenched the city on Nov. 19, and the 1.26 inches that fell on Friday—has pushed Seattle’s 2012 rainfall total to the brink of 40 inches, with 39.84 inches the official tally through today. After a pair of sunny, dry days tomorrow and Tuesday, light rain is forecast to return sometime on Wednesday, with an additional rainmaker arriving Thursday.
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