January Weather in Arenal, Honduras

Last updated: August 23, 2025

In January, the average temperature in Arenal, Honduras is a comfortable 21°C (69°F). Expect a range with minimums dropping to 11°C (51°F) and highs reaching up to 34°C (94°F). Be prepared for some precipitation, with an average of 37 mm (1.5 in) spread over 11 days. The air tends to be on the humid side, with an average humidity of 78%.

January Temperature in Arenal

In January in Arenal, the average temperature is 21°C (69°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 11°C (51°F). This makes it an ideal time for outdoor activities and exploration, so pack accordingly!

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 21°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (51°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 total precipitation amount is 37 mm (1.5 in), occurring over the course of 11 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 37 mm (1.5 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Arenal

In Arenal in January, humidity is 78%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace that clings to your skin, making outdoor activities feel more intense and leaving you yearning for refreshing breezes or a cool drink as you explore.

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 78%, 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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, 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	21°C (69°F)	37 mm (1.5 inches)	78%	extreme
February Weather	22°C (71°F)	23 mm (0.9 inches)	74%	extreme
March Weather	23°C (73°F)	25 mm (1.0 inches)	67%	extreme
April Weather	25°C (77°F)	37 mm (1.4 inches)	61%	extreme
May Weather	25°C (78°F)	126 mm (5.0 inches)	59%	extreme
June Weather	25°C (77°F)	131 mm (5.2 inches)	61%	extreme
July Weather	24°C (76°F)	99 mm (3.9 inches)	68%	extreme
August Weather	24°C (76°F)	122 mm (4.8 inches)	70%	extreme
September Weather	24°C (76°F)	125 mm (4.9 inches)	75%	extreme
October Weather	23°C (74°F)	205 mm (8.1 inches)	81%	extreme
November Weather	22°C (71°F)	127 mm (5.0 inches)	82%	very high
December Weather	21°C (69°F)	49 mm (1.9 inches)	75%	very high