Seattle's late-summer heat fades as cooler marine air moves in
Seattle saw another warm day on Monday, with temperatures hitting 79 degrees at Boeing Field. The coming week will bring a shift in weather, starting with sunshine before cooling down midweek. The week began with dry, sunny conditions, keeping temperatures well above normal for late summer. Normal highs for this time of year usually sit in the mid-60s, but the region has stayed warmer than average.
From Tuesday, mornings will start cloudy before the skies clear by afternoon. Highs will drop to the mid-70s on Tuesday, then fall further to around 70 degrees on Wednesday and Thursday. A weak weather system moving north will push Friday’s high down into the mid-60s.
Onshore winds are now shifting offshore, pulling cooler marine air into the area. However, a ridge of high pressure could push temperatures back into the mid-70s by the weekend.
Rain remains absent from the forecast, adding to concerns about water supply. The region is already below normal precipitation levels, which could worsen if dry conditions persist. The week will see a steady cooldown after Monday’s warmth, with the lowest temperatures arriving on Friday. While the weekend may warm up again, the lack of rain continues to raise worries about water shortages in the area.
