August Weather in Buenos Aires, Costa Rica

Last updated: August 23, 2025

In August, the average temperature in Buenos Aires, Costa Rica reaches a comfortable 20°C (67°F). Expect a range from a cool 14°C (58°F) to a warm 26°C (80°F). However, prepare for a fair amount of rain, with 354 mm (13.9 in) expected over 29 days. The air will be quite humid, with an average humidity of 82%.

August Temperature in Buenos Aires

In August in Buenos Aires, the average temperature is 20°C (67°F). Maximums can reach 26°C (80°F), and minimums can be as low as 14°C (58°F). This mild climate makes Buenos Aires an ideal destination for travelers seeking pleasant weather during this time of year.

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

The chart illustrates August 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, August typically has an average temperature of 20°C (67°F), with highs reaching up to 26°C (80°F) and lows dropping to around 14°C (58°F).

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

August Precipitation in Buenos Aires

In Buenos Aires in August, the precipitation amount is 354 mm (13.9 in) spread over a duration of 29 days.

August Precipitation Trends in Buenos Aires

The chart displays monthly precipitation patterns in Buenos Aires, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Buenos Aires, August typically receives around 354 mm (13.9 inches) of precipitation spread over approximately 29 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Buenos Aires

In Buenos Aires in August humidity is 82%. With an average temperature of 20°C (67°F), this humidity feels like a warm, thick blanket enveloping you, making travel slightly uncomfortable as you navigate the stickiness in the air.

August Average Humidity in Buenos Aires

This chart illustrates the average monthly humidity levels in Buenos Aires, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Buenos Aires is approximately 82%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Buenos Aires

In Buenos Aires in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Buenos Aires in August, 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 August, the maximum UV index in Buenos Aires typically reaches 14, which falls under the extreme exposure category.

Data source: Buenos Aires August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	50 mm (2.0 inches)	68%	extreme
February Weather	19°C (66°F)	42 mm (1.6 inches)	68%	extreme
March Weather	19°C (67°F)	35 mm (1.4 inches)	66%	extreme
April Weather	20°C (68°F)	113 mm (4.5 inches)	67%	extreme
May Weather	20°C (68°F)	397 mm (15.6 inches)	69%	extreme
June Weather	20°C (68°F)	288 mm (11.4 inches)	84%	extreme
July Weather	20°C (68°F)	237 mm (9.3 inches)	85%	extreme
August Weather	20°C (67°F)	354 mm (13.9 inches)	82%	extreme
September Weather	19°C (67°F)	299 mm (11.8 inches)	81%	extreme
October Weather	19°C (67°F)	490 mm (19.3 inches)	80%	extreme
November Weather	19°C (67°F)	304 mm (12.0 inches)	80%	extreme
December Weather	19°C (66°F)	86 mm (3.4 inches)	72%	extreme