Santiago Weather in January
Chile · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Santiago sees average temperatures ranging from a low of 15.1°C (59.2°F) to a high of 30.0°C (86.0°F), with a mean of 21.6°C (70.9°F). Compared to the annual average of 16.1°C (61.0°F), this month is 5.5°C warmer than the yearly norm. Precipitation averages 14.6mm, making it approximately 16.0mm drier than the monthly average of 30.0mm. The city receives an average of 13.5 hours of sunshine per day during January, with relative humidity averaging 49.7%. Wind speeds reach an average maximum of 19.2 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.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 20.8°C (69.4°F) | 21.6°C (70.9°F) | 21.7°C (71.1°F) |
| Rainfall | 1.9mm | 14.6mm | 4.3mm |
| Sunshine | 13.4 hrs | 13.5 hrs | 12.6 hrs |
| Humidity | 48.6% | 49.7% | 51.8% |
| Wind | 18.0 km/h | 19.2 km/h | 17.9 km/h |
| Rainy Days | 0.8 | 1.0 | 1.4 |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Santiago in January, 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 January?
The average temperature in Santiago during January ranges from 15.1°C (59.2°F) to 30.0°C (86.0°F), with a mean of 21.6°C (70.9°F).
How much does it rain in Santiago in January?
Santiago receives an average of 14.6mm of precipitation in January, spread across approximately 1.0 rainy days.
What should I pack for Santiago in January?
Based on January weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is January a good time to visit Santiago?
January is a good time to visit Santiago, with comfortable temperatures and manageable rainfall.
Other Months for Santiago
Cities with Similar January 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.