Weather Blog

First time in 22 years Seattle hits 90 in September

First time in 22 years Seattle hits 90 in September
A sunny, 90 degree day in Seattle on Sept. 7, 2012. (Photo: Puget Sound Clean Air Agency Visibility Camera.)

It's been a while since it's been this warm in September.

Seattle hit 90 degrees on Friday, the first time we've reached the 90 degree mark in September since 1990. (Yes, last year when we had a stretch of eight days in the 80s, we didn't reach 90.)

Overall, it's just the 8th time since 1945 that Sea-Tac hit 90 in September, the other years coming in 1967, 1979, 1981, and then a four year streak between 1987 and 1990.

The 90 degree reading was also the fifth time in 2012 the temperature hit 90 in Seattle, joining August 4th, 5th, 16th and 17th. It's the third time in the past four years Seattle has had five or more days in the 90s. The average is (was?) three per year.

However, bad timing prevented Friday's 90 from being a record high. The hot September day in 1981 that was over 90 also fell on the 7th and it reached 94 degrees.

While Seattle was among the hottest temperatures recorded, it was even hotter on the coast where Hoquiam hit 92. It was 89 in Forks. Other high temperatures included 88 in Tacoma, Bremerton and North Bend, 89 in Olympia and Renton, 92 in Shelton and 95 in Vancouver. If you wanted to escape the heat, you had to head north where the high was 82 in Everett and Friday Harbor, 81 in Mount Vernon and 79 in Bellingham and Port Angeles.

Saturday will be a little cooler inland, but much cooler along the coast as the marine layer marches up the coastline. Astoria, Ore. soared to 84 degrees at midday but the temperature crashed into the low 60s two hours later as the fog rolled in. They were down in the upper 50s by evening. A similar cooling fate awaits the Washington coast by Saturday and the rest of Western Washington by Sunday, where highs were only expected in the 60s.

We'll even add in some rain for Monday, but long range models suggest another warm-to-hot spell is possible by the end of next week.