Santiago weather in August
August in Santiago: cool, a little rain, with poor air quality — a great time to visit.
#10 of 12 months in Santiago · #409 of 604 destinations to visit in August · comfort 71/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Santiago climate normals — August
| Daytime high | 16°C / 61°F | 🙂 cool |
|---|---|---|
| Nighttime low | 4°C / 38°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 69 mm / 2.7 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 2°C / 36°F | |
| Sunshine | 8.7 h/day | |
| Daylight | 10.9 h | |
| Wind | 9 km/h / 5 mph | |
| Air quality (US AQI) | 109 | 😷 poor |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santiago in August — FAQ
- Is August a good time to visit Santiago?
- August in Santiago: cool, a little rain, with poor air quality — a great time to visit. It ranks #10 of 12 months for Santiago on SeasonMap's comfort score (71/100).
- What is the weather like in Santiago in August?
- In August, Santiago averages a daily high of 15.9°C and a low of 3.5°C, with about 68.7 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Santiago in August?
- Santiago has a mean US Air Quality Index of about 109 in August.