Santiago Weather in September

September in Santiago brings high temperatures, with highs of 28°C (82°F) and nights dropping to 18°C (64°F). It's the rainiest month of the year, so come prepared with waterproof gear.

Rainfall in Santiago in September

This month is characterized by heavy rain, often falling intensely. Equip yourself with a poncho to stay protected from the rain. Looking at the last 30 years, the data shows about 8 days with rain, averaging 194 mm (7.6 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Santiago in September

In September, expect high temperatures in Santiago, with highs of 28°C (82°F) and lows of 18°C (64°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 18°C (64°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Santiago in September

Expect a lot of sunshine this month, with about 200 hours of sun. These sunny conditions add to the overall experience.

September in Santiago has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• August

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• October
• November
• December

For a detailed overview over the year and the best time to visit Mexico, check out our Santiago's climate page.

Santiago Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 25%  

Precipitation 194 mm (7.6 in)  

Rainy days 8 days  

Humidity 70% *  

Sunshine 200 hours *  

Percentage Sunshine *  

* Data from: Monterrey, Mexico (32 KM, 20 Miles).

What to Wear in Santiago in September

Warm but pleasant conditions in Santiago in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Santiago in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Mexico, check out our Santiago's climate page.

More climate data for Santiago

Temperature Rainfall Sunshine Humidity

See the full Santiago climate overview or explore weather in Mexico.