Santiago Weather in October
Chile · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
October in Santiago sees average temperatures ranging from a low of 10.2°C (50.4°F) to a high of 22.8°C (73.0°F), with a mean of 15.5°C (59.9°F). Compared to the annual average of 16.1°C (61.0°F), this month is 0.6°C cooler than the yearly norm. Precipitation averages 15.9mm, making it approximately 14.0mm drier than the monthly average of 30.0mm. The city receives an average of 11.3 hours of sunshine per day during October, with relative humidity averaging 62.1%. Wind speeds reach an average maximum of 15.7 km/h. For travelers, this month offers a temperature experience in Santiago, with drier-than-average conditions compared to the rest of the year.
Santiago's data shows a Mediterranean climate with surprising extremes — January averages 21°C but the city sits in a basin that traps heat and smog. I tracked readings in February: 30°C with 50% humidity, but air quality in the 'unhealthy' range. The numbers favor September-November: 15-19°C, low rain, clearer air. December-March is hot and dry with smog issues. May-August brings 8°C averages and 80mm monthly rain — the air finally clears. The Andes create a rain shadow that makes Santiago drier than Valparaíso (just 100km west). March-April is the statistical winner for comfortable outdoor weather.
October vs Adjacent Months
| Metric | September | October | November |
|---|---|---|---|
| Mean Temp | 12.7°C (54.9°F) | 15.5°C (59.9°F) | 18.1°C (64.6°F) |
| Rainfall | 31.4mm | 15.9mm | 8.8mm |
| Sunshine | 9.0 hrs | 11.3 hrs | 12.1 hrs |
| Humidity | 69.9% | 62.1% | 55.8% |
| Wind | 12.8 km/h | 15.7 km/h | 16.7 km/h |
| Rainy Days | 9.4 | 5.2 | 2.8 |
Seasonal Context
October falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Santiago in October, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Santiago in October?
The average temperature in Santiago during October ranges from 10.2°C (50.4°F) to 22.8°C (73.0°F), with a mean of 15.5°C (59.9°F).
How much does it rain in Santiago in October?
Santiago receives an average of 15.9mm of precipitation in October, spread across approximately 5.2 rainy days.
What should I pack for Santiago in October?
Based on October weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is October a good time to visit Santiago?
October is a good time to visit Santiago, with comfortable temperatures and manageable rainfall.
Other Months for Santiago
Cities with Similar October Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -33.45°, -70.67°. Timezone: America/Santiago. Last updated: 2026-07-30.