Santiago weather in September (Santiago Metropolitan Region, Chile)

How is the weather in Santiago in September? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.

In September, the weather in Santiago typically experiences moderate temperatures and moderate rainfall. Daytime temperatures hover around 18°C (show in °F), while nights can cool down to about 5°C.

Santiago in September usually receives moderate rainfall, averaging around 72 mm (show in inches) for the month. Delving into the climate records from the past 30 years, one can predict that nearly 4 days of the month will see rainfall.

The area enjoys a balanced 186 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If your ideal weather consists of dry skies and moderate temperatures January, February, March, April, October, November and December generally stand out with best weather. While June tends to showcase less optimal conditions.

For an in-depth look at the yearly weather and climate conditions, visit our specialized Santiago climate page with graphs.


Santiago, monthly averages in September

Show in Fahrenheit
Min Temperature 4.7°C  
Max Temperature 17.8°C  
Chance of Rain 12%  
Precipitation 72 mm  
Rainy days 4 days  
Humidity 76%  
Sunshine 186 hours  
Percentage Sunshine  

Where to go in Chile in September

Find out more about the weather in Chile in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So, what should you wear in Santiago in September?

​ For visitors traveling to Santiago, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes. ​ ​

What To Do

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

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Santiago.

Our site offers climate and forecast data for every country in the world. Are you going to Chile? On this website you can find historical weather averages for many cities in Chile. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.