Buenos Aires Weather in January
In January, Buenos Aires averages a high of 30°C (86°F) and a low of 21°C (69°F), from 51 years of daily records (1971–2025).
30°C
Average high
86°F
21°C
Average low
69°F
39°C
Record high
101°F · January 27, 1987
9°C
Record low
49°F · January 30, 1988
What January Is Like in Buenos Aires
- 5 of the 10 warmest Januarys on record in Buenos Aires have come since 2011.
- The January heat record, 39°C (101°F) on January 27, 1987, has stood for 38 years.
- The coldest January reading, 9°C (49°F) on January 30, 1988, has not been matched in 37 years.
- January is Buenos Aires's warmest month of the year.
At least 1 mm of rain falls on 32% of January days.
Warmest: 1989 (32.2°C)Latest: 2025 (29.4°C)10-year averageLong-run average (29.9°C)
Look Up a Day in January
See the weather in Buenos Aires on any January date, year by year.
Source: NOAA GHCN-Daily, Buenos Aires Observ (1971–2025); Aeroparque Jorge Newbery (1973–2025). Averages cover 1971–2025. How we compute this