Santiago Weather in August
Chile · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Santiago sees average temperatures ranging from a low of 7.2°C (45.0°F) to a high of 16.2°C (61.2°F), with a mean of 11.1°C (52.0°F). Compared to the annual average of 16.1°C (61.0°F), this month is 5.0°C cooler than the yearly norm. Precipitation averages 77.1mm, making it approximately 47.0mm wetter than the monthly average of 30.0mm. The city receives an average of 8.2 hours of sunshine per day during August, with relative humidity averaging 69.6%. Wind speeds reach an average maximum of 11.0 km/h. Snowfall averages 0.5cm during August, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in Santiago, with wetter-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.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 10.7°C (51.3°F) | 11.1°C (52.0°F) | 12.7°C (54.9°F) |
| Rainfall | 49.3mm | 77.1mm | 31.4mm |
| Sunshine | 7.5 hrs | 8.2 hrs | 9.0 hrs |
| Humidity | 61.1% | 69.6% | 69.9% |
| Wind | 9.2 km/h | 11.0 km/h | 12.8 km/h |
| Rainy Days | 5.8 | 10.6 | 9.4 |
| Snowfall | 1.1 cm | 0.5 cm | 0.0 cm |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Santiago in August, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Santiago in August?
The average temperature in Santiago during August ranges from 7.2°C (45.0°F) to 16.2°C (61.2°F), with a mean of 11.1°C (52.0°F).
How much does it rain in Santiago in August?
Santiago receives an average of 77.1mm of precipitation in August, spread across approximately 10.6 rainy days.
What should I pack for Santiago in August?
Based on August weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is August a good time to visit Santiago?
August is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Santiago
Cities with Similar August 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.