Santiago weather in December
December in Santiago: warm, dry — one of the best months to visit.
#2 of 12 months in Santiago · #7 of 604 destinations to visit in December · comfort 94/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Santiago climate normals — December
| Daytime high | 27°C / 81°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Feels like (high) | 28°C / 82°F | |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 54% | 🍃 comfortable |
| Dew point | 10°C / 50°F | |
| Sunshine | 13.2 h/day | |
| Daylight | 14.3 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 75 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santiago in December — FAQ
- Is December a good time to visit Santiago?
- December in Santiago: warm, dry — one of the best months to visit. It ranks #2 of 12 months for Santiago on SeasonMap's comfort score (94/100).
- What is the weather like in Santiago in December?
- In December, Santiago averages a daily high of 27.2°C and a low of 14.9°C, with about 3.1 mm of rain over roughly 0.4 rainy days.
- What is the air quality in Santiago in December?
- Santiago has a mean US Air Quality Index of about 75 in December.