Seattle is lining up a textbook July day for Tuesday, July 14, with wall-to-wall sunshine, warm temperatures near 81°F and light north winds. The dry streak sticks around through Wednesday, July 15, before a weak coastal low slips inland late Wednesday night and brings a shot at showers and a few brief, isolated thunderstorms on Thursday morning, July 16. Any rain that does show up should stay on the light side, and drier weather returns by Friday, with the weekend shaping up mostly warm and dry.
Afternoon Heat And What To Expect
Afternoon highs will land in the upper 70s to low 80s across most neighborhoods, with inland spots and the I-5 corridor between Seattle and Tacoma running a bit warmer than areas near the water. Winds will be light from the north to northwest at about 1 to 8 mph, so it will feel like a standard Puget Sound summer day instead of a heavy, humid slog.
If you are heat sensitive, the City of Seattle continues to recommend limiting strenuous outdoor activity and using public cooling spaces when needed.
Rain Possible Thursday Morning
A weak upper-level low is expected to move onshore late Wednesday night and bring rain that is likely after 5 a.m. on Thursday, July 16. Forecasters put the chance of precipitation near 60 percent and expect new rainfall amounts under a tenth of an inch for most places. Brief thunderstorms are most likely over higher terrain, with only a small chance they spill into the city.
Plan on a light jacket for early Thursday plans and slightly cooler afternoon readings that day, according to the National Weather Service.
Weekend Outlook
Dry weather returns on Friday, July 17, with daytime highs in the mid to upper 70s. Building high pressure will bring warmer, drier conditions Saturday and Sunday, with highs climbing back into the upper 70s and low 80s. The warming trend looks to continue into next week, with Monday, July 20, potentially nudging into the low to mid 80s.
Stay Cool If You’re Vulnerable
If you or someone you care for is sensitive to heat, check the City of Seattle list of cooling centers and public air-conditioned spaces before heading out. Shift outdoor activity to mornings or evenings when you can, carry water, and watch for signs of heat exhaustion such as dizziness, nausea or heavy sweating. Employers and event organizers should plan for shade, hydration and regular rest breaks during the warmest part of the afternoon.
