October Weather in Arenal, Colombia

Last updated: August 23, 2025

In October, the average temperature in Arenal, Colombia is a warm 27°C (81°F), with a comfortable minimum of 22°C (71°F) and a sizzling maximum of 37°C (99°F). Visitors can expect about 205 mm (8.1 in) of precipitation spread over 28 days, contributing to an average humidity of 85%. It's the perfect time to experience the lush beauty of the region!

October Temperature in Arenal

In October in Arenal, the average temperature is 27°C (81°F), with maximums reaching 37°C (99°F) and minimums dropping to as low as 22°C (71°F). This warm climate makes it an ideal destination for sun-seekers and outdoor enthusiasts alike.

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

The chart illustrates October 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, October typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 22°C (71°F).

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

October Precipitation in Arenal

In Arenal in October, the total precipitation amount is 205 mm (8.1 in) over a span of 28 days.

October Precipitation Trends in Arenal

The chart displays monthly precipitation patterns in Arenal, 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 Arenal, October typically receives around 205 mm (8.1 inches) of precipitation spread over approximately 28 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Arenal

In Arenal in October humidity is 85%. With an average temperature of 27°C (81°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier as sweat clings to your skin and the air feels almost tangible, which can be quite challenging for traveling.

October Average Humidity in Arenal

This chart illustrates the average monthly humidity levels in Arenal, 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 Arenal is approximately 85%, 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 Arenal

In Arenal in October, 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 October

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

Data source: Arenal 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 Arenal Compares to Other Months

Weather in Arenal varies notably across the year, with each month offering distinct climate conditions. This page compares October’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 October’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