Weekend Weather Forecast - Seattle

Weekend weather in Seattle. Saturday high 21°C (70°F). Sunday high 18°C (64°F).

Weekend Hourly Forecast

Fri·11 Sep
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Temperature · peaks at +19°C

48-Hour Weekend Forecast Chart

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Fri11 Sep
Sat12 Sep
Sun13 Sep
Night
Morning
Day
Evening
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Morning
Day
Evening
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Morning
Day
Evening

Temperature · peaks at +15°C

Weekend Activity Outlook

Travel / Drive
Rating
Poor
Reason
Heavy rain — road conditions poor
Outdoor Sports
Rating
Poor
Reason
Wet field — matches likely cancelled
Home / Laundry
Rating
Poor
Reason
Rain will prevent outdoor drying
Outdoor Events
Rating
Poor
Reason
Venue should have indoor backup ready

5-Day Weather Forecast

Full 15-Day Forecast
Today11 Sep
Overcast
19°/ 11°
3%
Rain
1–11
Wind
Tomorrow12 Sep
Overcast
21°/ 11°
58%
Rain
1–17
Wind
Sun13 Sep
Rainy
18°/ 12°
78%
Rain
8–21
Wind
Mon14 Sep
Overcast
20°/ 12°
4%
Rain
2–13
Wind
Tue15 Sep
Overcast
20°/ 10°
1%
Rain
1–14
Wind

Weather Insight

Seattle is forecast to reach a high of 21°C this weekend, with an overnight low around 11°C. Expect a fair chance of rain (58% probability) and a gentle breeze averaging 17 km/h. Air quality is currently good (AQI 48), with no notable outdoor health concerns.

Today vs Normal

19°C-2° below normal

The long-term average high for today is 21°C.

10 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running below normal.

2026-08-28: 19°C19°2026-08-29: 18°C18°2026-08-30: 19°C19°2026-08-31: 22°C22°2026-09-01: 18°C18°2026-09-02: 17°C17°2026-09-03: 17°C17°2026-09-04: 19°C19°2026-09-05: 19°C19°2026-09-06: 21°C21°2026-09-07: 19°C19°2026-09-08: 21°C21°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.