Tag: Seattle Average Yearly Rainfall

Rain Stats

Filed in Posted on January 25, 2013 12:52 pm by

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.

55.14 inches of precipitation doused Seattle in 1950—the wettest year on record for the city. Just two years later, however, only a meager 23.78 inches fell—making 1952 the driest year in Seattle’s history.

55.14 inches of precipitation doused Seattle in 1950—the wettest year on record for the city. Just two years later, however, only a meager 23.78 inches fell—making 1952 the driest year in Seattle’s history.

In 1996, Seattle topped 50 inches of precipitation for just the third time—good enough for the second-soggiest year on record. By contrast, a mere 25.13 inches was recorded in 1985, making it second only to 1952 in terms of dryness.

In 1996, Seattle topped 50 inches of precipitation for just the third time—good enough for the second-soggiest year on record. By contrast, a mere 25.13 inches was recorded in 1985, making it second only to 1952 in terms of dryness.

Seattle had never seen a daily rainfall of 4 inches or more until Oct. 20, 2003, when a torrential 5.02 inches deluged the city--setting a new record for the wettest day in Seattle history. Just four years later, 3.77 inches fell at the height of widespread flooding in Western Washington.

Seattle had never seen a daily rainfall of 4 inches or more until Oct. 20, 2003, when a torrential 5.02 inches deluged the city—setting a new record for the wettest day in Seattle history. Just four years later, 3.77 inches fell at the height of widespread flooding in Western Washington, placing Dec. 3, 2007 second on the list.

Note: Data in all charts from records taken at Sea-Tac Airport.

40 Inches and Counting

Filed in Rain Posted on November 29, 2012 3:33 pm by 0 Comments
40 Inches and Counting

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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2012 Rainfall Nearing 40 Inches

Filed in Rain Posted on November 25, 2012 6:57 pm by 0 Comments
2012 Rainfall Nearing 40 Inches

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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