UV Index in Arenal, Colombia

Last updated: July 2, 2025

Understanding the UV Index in Arenal, Colombia, is crucial for maintaining skin health and preventing sunburn, especially given the region's tropical climate. With UV levels peaking at 13 around noon, Arenal experiences significant sun exposure risks that can affect both locals and visitors alike. By monitoring the UV Index, you can take essential precautions to protect your skin and enjoy the beautiful outdoor activities that Arenal has to offer while minimizing harmful effects. Stay informed and stay safe under the Colombian sun!

Hourly UV Index in Arenal

The UV Index varies significantly throughout the day, peaking between 12:00 PM and 1:00 PM at a striking 13—a clear signal to take precautions if you're outdoors. Starting the morning with a mild 1 at 7:00 AM, the UV levels rise steadily, reaching 6 by 9:00 AM and climbing to a critical high of 12 by 11:00 AM. After the noon peak, there's a gradual decline, with values falling to 5 at 3:00 PM, and ultimately dropping back to 1 by 5:00 PM and remaining low past sunset at 6:00 PM and 7:00 PM, where the index hits 0. Keep in mind this rhythm of UV exposure, as it underscores the importance of sun protection during the midday hours!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	5	moderate	30 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Arenal

The UV Index exhibits extreme levels throughout most of the year, with particularly high values from January to April, peaking at 15 in April and remaining above 12 until November. From May onwards, the index slightly declines but stays within the extreme range, indicating a consistent risk for skin damage from UV rays. December sees a drop to a very high level of 10, but burn times still remain short. Therefore, it is essential for both visitors and residents to take precautions, especially during the high-risk months of March to April, by seeking shade, wearing protective clothing, and applying sunscreen frequently to mitigate the risk of sunburn.

Monthly Maximum UV Index for Arenal, Colombia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Arenal. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Arenal, based on 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.

Compare Arenal UV Index with Other Colombia Cities

The table above highlights how UV exposure in Arenal compares to other major locations across Colombia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Arenal's solar exposure compared to other cities in Colombia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Barranquilla UVI	11	12	14	14	13	12	13	13	13	13	11	10
Cartagena UVI	11	11	13	15	13	13	12	13	13	13	11	10
Arenal	12	13	14	15	14	13	13	13	13	13	12	10
Medellin UVI	14	15	17	16	16	14	14	15	14	14	13	12
Cali UVI	15	16	17	17	15	14	14	14	15	14	13	12
Bogota UVI	15	16	18	18	17	15	15	16	15	15	14	13