January Weather in Buenos Aires, Peru

Last updated: August 27, 2025

In Buenos Aires, Peru, the average temperature in January hovers around 21°C (69°F), creating a pleasantly warm atmosphere. You'll experience lows of 17°C (63°F) and highs of 26°C (79°F), giving you a comfortable range to enjoy outdoor activities. However, be prepared for some rain, as 17 mm (0.7 in) of precipitation can fall over 4 days, accompanied by an average humidity of 91%.

January Temperature in Buenos Aires

In January in Buenos Aires, the average temperature is 21°C (69°F). Maximums can reach 26°C (79°F), while minimums can dip to as low as 17°C (63°F). This mild climate makes Buenos Aires an ideal travel destination for those seeking comfortable weather.

January Weather in Buenos Aires: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Buenos Aires, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Buenos Aires, January typically has an average temperature of 21°C (69°F), with highs reaching up to 26°C (79°F) and lows dropping to around 17°C (63°F).

Data source: Temperature data for Buenos Aires generated using information from the Copernicus Climate Change Service.

January Precipitation in Buenos Aires

In Buenos Aires in January, the precipitation amount is 17 mm (0.7 in) over a span of 4 days.

January Precipitation Trends in Buenos Aires

The chart displays monthly precipitation patterns in Buenos Aires, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Buenos Aires, January typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Buenos Aires

In Buenos Aires in January humidity is 91%. With an average temperature of 21°C (69°F), this humidity feels like walking through a warm, damp embrace, making travel a sweaty endeavor as the air clings to your skin and the slightest movement requires extra effort.

January Average Humidity in Buenos Aires

This chart illustrates the average monthly humidity levels in Buenos Aires, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Buenos Aires is approximately 91%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Buenos Aires

In Buenos Aires in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Buenos Aires, you can check here.

Maximum UV Index Levels in Buenos Aires for January

The chart shows the monthly maximum UV Index (UVI) for Buenos Aires in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Buenos Aires typically reaches 14, which falls under the extreme exposure category.

Data source: Buenos Aires January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Buenos Aires Compares to Other Months

Weather in Buenos Aires varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Buenos Aires, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Buenos Aires, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (69°F)	17 mm (0.7 inches)	91%	extreme
February Weather	22°C (72°F)	16 mm (0.6 inches)	89%	extreme
March Weather	22°C (72°F)	28 mm (1.1 inches)	89%	extreme
April Weather	20°C (68°F)	16 mm (0.6 inches)	88%	extreme
May Weather	18°C (65°F)	13 mm (0.5 inches)	84%	extreme
June Weather	18°C (64°F)	15 mm (0.6 inches)	73%	very high
July Weather	17°C (63°F)	19 mm (0.8 inches)	55%	very high
August Weather	16°C (61°F)	19 mm (0.8 inches)	53%	extreme
September Weather	16°C (61°F)	24 mm (1.0 inches)	62%	extreme
October Weather	16°C (61°F)	22 mm (0.9 inches)	82%	extreme
November Weather	17°C (63°F)	13 mm (0.5 inches)	89%	extreme
December Weather	19°C (66°F)	22 mm (0.9 inches)	91%	extreme