King County, WA Weather Forecast
County weather hub
Rain Likely then Showers And Thunderstorms
Compare major city weather across King County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain likely before 5am, then showers and thunderstorms. Cloudy. Low around 52, with temperatures rising to around 54 overnight. West southwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for King County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 31 of 31 mapped cities in King County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 28 to Sep 4, 2026
- Latest sync
- Aug 29, 2026 1:36 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in King County
Monday looks like the warmest upcoming period in King County at 72 degrees F.
Saturday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Saturday at about 2 to 6 mph SW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 29, 2026 1:36 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 8am, then rain between 8am and 11am, then showers and thunderstorms likely between 11am and 2pm, then a chance of rain. Mostly cloudy, with a high near 62. Southwest wind 2 to 6 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of rain before 9pm. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. South southwest wind 2 to 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Mostly cloudy, with a high near 65. Southwest wind around 3 mph.
Partly cloudy, with a low around 50. Northeast wind around 5 mph.
Mostly sunny, with a high near 72.
Mostly cloudy, with a low around 54.
A chance of rain after 11am. Partly sunny, with a high near 69.
A chance of rain. Mostly cloudy, with a low around 54.
Rain. Cloudy, with a high near 62.
Rain. Mostly cloudy, with a low around 52.
Rain likely. Mostly cloudy, with a high near 62.
A chance of rain. Mostly cloudy, with a low around 50.
A chance of rain. Partly sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Aug 28
|
Rain Likely then Showers And Thunderstorms
|
52°F |
5 mph
WSW
|
|
Saturday
Aug 29
|
Showers And Thunderstorms
|
62°F |
2 to 6 mph
SW
|
|
Saturday Night
Aug 29
|
Chance Light Rain then Mostly Cloudy
|
50°F |
2 to 6 mph
SSW
|
|
Sunday
Aug 30
|
Mostly Cloudy
|
65°F |
3 mph
SW
|
|
Sunday Night
Aug 30
|
Partly Cloudy
|
50°F |
5 mph
NE
|
|
Monday
Aug 31
|
Mostly Sunny
|
72°F |
5 mph
NE
|
|
Monday Night
Aug 31
|
Mostly Cloudy
|
54°F |
5 mph
E
|
|
Tuesday
Sep 1
|
Chance Light Rain
|
69°F |
6 mph
SSW
|
|
Tuesday Night
Sep 1
|
Chance Light Rain
|
54°F |
6 mph
SSW
|
|
Wednesday
Sep 2
|
Rain
|
62°F |
2 to 6 mph
S
|
|
Wednesday Night
Sep 2
|
Rain
|
52°F |
5 mph
SSE
|
|
Thursday
Sep 3
|
Light Rain Likely
|
62°F |
3 mph
SSW
|
|
Thursday Night
Sep 3
|
Chance Light Rain
|
50°F |
3 mph
SSE
|
|
Friday
Sep 4
|
Chance Light Rain
|
66°F |
3 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across King County.
Coverage
Forecast coverage currently spans 31 of 31 mapped cities in King County.
Largest mapped city population in this region: 769,714.
