October Weather in Buenos Aires, Costa Rica

Last updated: August 23, 2025

In Buenos Aires, Costa Rica, the average temperature in October hovers around 19°C (67°F), making it a comfortable time to visit. Expect a minimum of 10°C (51°F) and a maximum of 26°C (80°F). With an average humidity of 80%, the air can feel quite moist. Be prepared for some rainfall, as 490 mm (19.3 in) of precipitation is expected over 30 days.

October Temperature in Buenos Aires

In October in Buenos Aires, the average temperature is 19°C (67°F). Maximums can reach 26°C (80°F) and minimums can be as low as 10°C (51°F). It’s a great time to explore Buenos Aires comfortably, as the weather is mild and perfect for outdoor activities.

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

The chart illustrates October 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, October typically has an average temperature of 19°C (67°F), with highs reaching up to 26°C (80°F) and lows dropping to around 10°C (51°F).

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

October Precipitation in Buenos Aires

In Buenos Aires in October, the total precipitation amount is 490 mm (19.3 in) over a span of 30 days.

October Precipitation Trends in Buenos Aires

The chart displays monthly precipitation patterns in Buenos Aires, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Buenos Aires, October typically receives around 490 mm (19.3 inches) of precipitation spread over approximately 30 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Buenos Aires

In Buenos Aires in October humidity is 80%. With an average temperature of 19°C (67°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor exploration a bit uncomfortable and sticky, yet it encourages you to seek out refreshing indoor activities or shaded spots to escape the heat.

October Average Humidity in Buenos Aires

This chart illustrates the average monthly humidity levels in Buenos Aires, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Buenos Aires is approximately 80%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Buenos Aires

In Buenos Aires in October, 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 October

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

Data source: Buenos Aires October 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 October 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 October’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 October’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