Buenos Aires weather in January
January in Buenos Aires: hot, a little rain, with clean air — an excellent time to visit.
#10 of 12 months in Buenos Aires · #148 of 604 destinations to visit in January · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Buenos Aires climate normals — January
| Daytime high | 29°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 76 mm / 3 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 65% | 💧 humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 14.2 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Buenos Aires in January — FAQ
- Is January a good time to visit Buenos Aires?
- January in Buenos Aires: hot, a little rain, with clean air — an excellent time to visit. It ranks #10 of 12 months for Buenos Aires on SeasonMap's comfort score (81/100).
- What is the weather like in Buenos Aires in January?
- In January, Buenos Aires averages a daily high of 28.6°C and a low of 21.2°C, with about 75.8 mm of rain over roughly 8.8 rainy days.
- What is the air quality in Buenos Aires in January?
- Buenos Aires has a mean US Air Quality Index of about 33 in January.