August Weather in Arenal, Colombia

Last updated: August 23, 2025

In August, the average temperature in Arenal, Colombia is a warm 28°C (83°F), with highs reaching up to 37°C (99°F) and lows dipping to 22°C (73°F). Visitors should be prepared for ample precipitation, with 187 mm (7.4 in) expected over the course of 25 days. The air is often thick with humidity, averaging around 83%, creating a tropical ambiance that is both vibrant and lush.

August Temperature in Arenal

In August in Arenal, the average temperature is 28°C (83°F), with maximums reaching 37°C (99°F) and minimums dropping to as low as 22°C (73°F). This warm and inviting climate makes it an ideal time for travelers looking to enjoy outdoor activities and explore the beauty of the region.

August Weather in Arenal: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Arenal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arenal, August typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (99°F) and lows dropping to around 22°C (73°F).

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

August Precipitation in Arenal

In Arenal in August, the total precipitation amount is 187 mm (7.4 in) spread over 25 days.

August Precipitation Trends in Arenal

The chart displays monthly precipitation patterns in Arenal, 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 Arenal, August typically receives around 187 mm (7.4 inches) of precipitation spread over approximately 25 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 Arenal

In Arenal in August humidity is 83%. With an average temperature of 28°C (83°F), this humidity feels like a warm, sticky blanket wrapping around you, making travel uncomfortable and requiring frequent breaks to hydrate and cool down.

August Average Humidity in Arenal

This chart illustrates the average monthly humidity levels in Arenal, 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 Arenal is approximately 83%, 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 Arenal

In Arenal in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Arenal.

Maximum UV Index Levels in Arenal for August

The chart shows the monthly maximum UV Index (UVI) for Arenal 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 Arenal typically reaches 13, which falls under the extreme exposure category.

Data source: Arenal 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 Arenal Compares to Other Months

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

This table compares monthly weather conditions in Arenal, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (84°F)	22 mm (0.9 inches)	51%	extreme
February Weather	30°C (86°F)	5 mm (0.2 inches)	47%	extreme
March Weather	30°C (86°F)	54 mm (2.1 inches)	45%	extreme
April Weather	28°C (83°F)	171 mm (6.7 inches)	46%	extreme
May Weather	28°C (82°F)	272 mm (10.7 inches)	62%	extreme
June Weather	28°C (82°F)	192 mm (7.6 inches)	81%	extreme
July Weather	28°C (83°F)	136 mm (5.3 inches)	87%	extreme
August Weather	28°C (83°F)	187 mm (7.4 inches)	83%	extreme
September Weather	27°C (82°F)	193 mm (7.6 inches)	83%	extreme
October Weather	27°C (81°F)	205 mm (8.1 inches)	85%	extreme
November Weather	27°C (81°F)	181 mm (7.1 inches)	83%	extreme
December Weather	28°C (82°F)	39 mm (1.5 inches)	65%	very high