Weekend Weather Forecast - San Francisco

Weekend weather in San Francisco. Saturday high 19°C (66°F). Sunday high 20°C (68°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
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Temperature · peaks at +18°C

Weekend Activity Outlook

Travel / Drive
Rating
Great
Reason
Clear roads — ideal for a drive (Morning is best)
Outdoor Sports
Rating
Great
Reason
Excellent conditions — low humidity, clear skies
Home / Laundry
Rating
Great
Reason
High wind (33 km/h) — excellent drying
Outdoor Events
Rating
Great
Reason
Clear skies — perfect for weddings or outdoor gatherings

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

San Francisco is forecast to reach a high of 19°C this weekend, with an overnight low around 14°C. That's 5° below the long-term average high of 24°C for this time of year. It continues a recent pattern — 4 of the last 19 days with published data have run cooler than normal. Expect little chance of rain (2% probability) and moderate breezes averaging 33 km/h. Air quality is currently Moderate (AQI 57), driven mainly by PM2.5 at 12 μg/m³.

Today vs Normal

27°C+3° above normal

The long-term average high for today is 24°C.

4 of the last 19 days with published data ran above normal.

That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.

2026-08-19: 21°C21°2026-08-20: 21°C21°2026-08-21: 20°C20°2026-08-22: 23°C23°2026-08-23: 25°C25°2026-08-24: 22°C22°2026-08-25: 23°C23°2026-08-26: 26°C26°2026-08-27: 27°C27°2026-08-28: 19°C19°2026-08-29: 23°C23°2026-08-30: 21°C21°

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

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.