Weekend Weather Forecast - Santiago

Weekend weather in Santiago. Saturday high 18°C (64°F). Sunday high 23°C (73°F).

Weekend Hourly Forecast

Fri·11 Sep
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Temperature · peaks at +16°C

48-Hour Weekend Forecast Chart

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Fri11 Sep
Sat12 Sep
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Temperature · peaks at +14°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

Weather Insight

Santiago is forecast to reach a high of 18°C this weekend, with an overnight low around 8°C. That's 1° below the long-term average high of 19°C for this time of year. It continues a recent pattern — 8 of the last 28 days with published data have run cooler than normal. Expect little chance of rain (8% probability) and light winds averaging 7 km/h. Air quality is currently Unhealthy for Sensitive Groups (AQI 125), driven mainly by PM2.5 at 41 μg/m³.

Today vs Normal

16°C-3° below normal

The long-term average high for today is 19°C.

8 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: 11°C11°2026-08-29: 14°C14°2026-08-30: 14°C14°2026-08-31: 15°C15°2026-09-01: 20°C20°2026-09-02: 18°C18°2026-09-03: 15°C15°2026-09-04: 16°C16°2026-09-05: 18°C18°2026-09-06: 19°C19°2026-09-07: 18°C18°2026-09-08: 17°C17°

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

Air Quality

Air Quality
Unhealthy for Sensitive Groups

Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.