UV Index in Zarcero, Costa Rica

Last updated: July 2, 2025

In Zarcero, Costa Rica, being aware of the UV Index is crucial for protecting your skin and overall health. As a region with a tropical highland climate, Zarcero experiences varying UV levels throughout the day, with peak values reaching up to 14 around midday. Understanding these UV levels is essential for preventing sunburn, reducing the risk of skin cancer, and maintaining healthy skin, especially when outdoor activities are common in the stunning natural surroundings. Check the UV Index regularly to enjoy the sun safely!

Hourly UV Index in Zarcero

The UV Index reveals a dramatic rise in sunlight intensity throughout the morning, peaking at an impressive 14 between 11:00 AM and 12:00 PM. This indicates a time when sun protection is vital, especially as it climbs swiftly from 2 at 07:00 AM to reach 8 by 09:00 AM, illustrating the day’s rapid increase in UV exposure. As the afternoon progresses, the index starts to decline, dropping to 5 at 3:00 PM before diminishing further to 1 by 5:00 PM and finally reaching 0 after 6:00 PM. Thus, the midday hours present the highest risk, calling for caution and proper sun safety measures!

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	4	moderate	30 min
09:00	8	very high	15 min
10:00	11	extreme	10 min
11:00	14	extreme	10 min
12:00	14	extreme	10 min
13:00	12	extreme	10 min
14:00	9	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 Zarcero

During the year, the UV Index remains consistently high, with extreme exposure levels from January through April and generally high values even in the summer months. The highest UV ratings occur in March and April, reaching a peak of 15, while December sees a slight reduction to a UV Index of 10, categorized as very high, with a longer potential burn time of 15 minutes. For visitors and residents, it is crucial to be vigilant during the high-risk months of March to April when the burn time is notably short at just 10 minutes. To protect yourself, always wear sunscreen, protective clothing, and seek shade, especially during midday hours, as prolonged exposure can lead to severe burns and increase the risk of skin damage.

Monthly Maximum UV Index for Zarcero, Costa Rica

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

The table above highlights how UV exposure in Zarcero 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.

Zarcero'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
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
Zarcero	12	13	14	15	14	14	14	13	13	14	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