January Weather in Arenal, Colombia

Last updated: August 23, 2025

In Arenal, Colombia, the average temperature in January is a warm 28°C (84°F), making it ideal for outdoor activities. You'll experience a comfortable minimum of 22°C (71°F), while the highs can reach up to 38°C (100°F). Expect some light rain, with an average precipitation of 22 mm (0.9 in) spread over 4 days. With an average humidity of 51%, the atmosphere remains enjoyable throughout the month.

January Temperature in Arenal

In January, in Arenal, the average temperature is 28°C (84°F). Maximum temperatures can reach 38°C (100°F), while minimum temperatures can drop to as low as 22°C (71°F). This warm climate makes Arenal an ideal destination for travelers seeking sunny weather and outdoor adventures.

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

The chart illustrates January 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, January typically has an average temperature of 28°C (84°F), with highs reaching up to 38°C (100°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.

January Precipitation in Arenal

In Arenal in January, the precipitation amount is 22 mm (0.9 in) over a duration of 4 days.

January Precipitation Trends in Arenal

The chart displays monthly precipitation patterns in Arenal, 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 Arenal, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Arenal

In Arenal in January, humidity is 51%. With an average temperature of 28°C (84°F), this humidity feels like a warm, enveloping embrace that can make outdoor activities a bit more challenging. Travelers may find themselves pleasantly sticky but will appreciate the lush surroundings and vibrant atmosphere it creates.

January Average Humidity in Arenal

This chart illustrates the average monthly humidity levels in Arenal, 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 Arenal is approximately 51%, 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 Arenal

In Arenal in January, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Arenal.

Maximum UV Index Levels in Arenal for January

The chart shows the monthly maximum UV Index (UVI) for Arenal 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 Arenal typically reaches 12, which falls under the extreme exposure category.

Data source: Arenal 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 Arenal Compares to Other Months

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