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ClimaGoSeattleWeather in September

Seattle Weather in September

United States

Pleasant early fall temperatures around 72°F with mostly clear skies and occasional rain beginning make this excellent for hiking, visiting wineries and enjoying summer festivals with fewer crowds.

Avg High

21°C

Avg Low

13°C

Daily Rain

2mm

Rainfall

Low

💡 Best months to visit Seattle: Jul, Aug, Jun

Seattle Weather by Month

MonthHighLowRain
Jan8°C3°C6.2mm
Feb8°C2°C3.6mm
Mar10°C3°C2.8mm
Apr13°C5°C2.9mm
May17°C9°C1.9mm
Jun21°C12°C1.9mm
Jul25°C15°C0.2mm
Aug25°C15°C0.7mm
Sep21°C13°C2mm
Oct16°C9°C3.6mm
Nov10°C5°C6mm
Dec7°C3°C6.1mm

About Seattle

Seattle's Pike Place Market, tech innovation and Puget Sound views blend coffee culture with natural beauty.