Buenos Aires weather in December
December in Buenos Aires: hot, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Buenos Aires · #54 of 604 destinations to visit in December · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Buenos Aires climate normals — December
| Daytime high | 27°C / 81°F | 🥵 hot |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 69 mm / 2.7 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 14.4 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 32 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Buenos Aires in December — FAQ
- Is December a good time to visit Buenos Aires?
- December in Buenos Aires: hot, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Buenos Aires on SeasonMap's comfort score (86/100).
- What is the weather like in Buenos Aires in December?
- In December, Buenos Aires averages a daily high of 27.1°C and a low of 19.2°C, with about 68.7 mm of rain over roughly 7.4 rainy days.
- What is the air quality in Buenos Aires in December?
- Buenos Aires has a mean US Air Quality Index of about 32 in December.