UV Index in Jaco, Costa Rica

Last updated: June 2, 2025

Understanding the UV Index is crucial for anyone enjoying the sunny beaches of Jaco, Costa Rica. With the region's tropical climate, the sun can be intense, and awareness of UV levels is vital for preventing sunburn and maintaining long-term skin health. The UV Index here can peak at a staggering 13 around noon, indicating an extreme risk of harm from unprotected sun exposure. By being informed about the UV Index, you can take the necessary precautions to enjoy the beautiful weather while safeguarding your skin against its potentially damaging effects.

Hourly UV Index in Jaco

The UV Index throughout the day showcases a dynamic and intense solar experience. Starting at 7:00 AM, it begins modestly at 2, gradually escalating to 5 by 8:00 AM. The real surge occurs by 9:00 AM, peaking at a striking 11 by 10:00 AM, and reaching its maximum of 13 during both 11:00 AM and 12:00 PM. As the afternoon unfolds, the index starts to decline, dipping to 12 at 1:00 PM and tapering off to 8 by 2:00 PM. By mid-afternoon, the UV intensity diminishes further, falling to 5 at 3:00 PM, before settling at a gentle 2 by 4:00 PM. The evening brings a welcome respite, with the UV Index reducing to 1 at 5:00 PM and finally dropping to zero by 7:00 PM, marking the end of a day characterized by significant exposure potential. Stay protected during those peak UV 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	2	low	45 min
08:00	5	moderate	30 min
09:00	8	very high	15 min
10:00	11	extreme	10 min
11:00	13	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Jaco

Throughout the year, UV Index levels indicate extreme exposure risk from January to July, with values consistently reaching 13 to 14. February, March, April, May, July, and August are identified as high-risk months, where the UV Index peaks at 14, indicating a burn time of just 10 minutes. Residents and visitors should take precautions during these months by wearing protective clothing, applying sunscreen regularly, and seeking shade when possible. As the year progresses, the UV Index gradually decreases, with November and December showing lower, albeit still significant levels. It's crucial to remain vigilant year-round, especially during the high-risk months, to protect skin health.

Monthly Maximum UV Index for Jaco, Costa Rica

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Jaco. 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 Jaco, 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 Jaco UV Index with Other Costa Rica Cities

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

Jaco's solar exposure compared to other cities in Costa Rica. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Jaco	11	13	13	14	14	13	14	13	13	13	11	10
Limon UVI	12	13	14	15	14	13	13	13	13	14	11	10
Liberia UVI	11	13	14	14	14	14	14	13	13	13	11	10
Alajuela UVI	12	13	15	15	14	14	14	13	13	14	12	10
San Jose UVI	12	14	15	16	14	14	14	14	14	15	12	11
Paraiso UVI	13	14	16	16	15	15	15	14	14	15	12	11