Santiago weather
Our guide to the weather in Santiago during September
We've looked at the most up-to-date weather data for Santiago, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Santiago weather in September.
What's the temperature like in Santiago during September?
The temperature reaches around 18℃ during the daytime in September, falling away to 5℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Santiago during September?
On average, there will be 2 rainy days during the month, amounting to 32.8mm in total. That's much drier than we see in England during August, and therefore not something to be concerned about. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Santiago during September?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. With moderate humidity, the wind will feel chilly, so you'll want to wear layers.
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