UV Index in Casillas, Guatemala

Last updated: August 1, 2025

In Casillas, Guatemala, being aware of the UV Index is crucial for protecting your skin and maintaining overall health. Understanding UV levels is not just about preventing painful sunburns; it plays a vital role in long-term skin health and reducing the risk of skin cancer. Given Casillas' tropical climate with intense sunlight, particularly during midday hours, UV exposure can reach dangerous levels—with indices peaking at 14 around noon, when the sun is most aggressive. Stay informed and take necessary precautions to enjoy the beautiful outdoors safely!

Hourly UV Index in Casillas

Experience the day's UV Index journey, starting at a gentle 1 at 7:00 AM, gradually climbing to a peak of 14 by noon. As the sun reaches its zenith, the UV intensity intensifies, with maximum levels recorded at 11:00 AM and 12:00 PM. The UV Index begins to taper off after 1:00 PM, dropping to 10 by 2:00 PM. As afternoon turns to evening, the levels decrease further, settling back to a safe 1 by 5:00 PM. With a final dip to 0 by 7:00 PM, the day's UV exposure concludes, reminding us of the sun's powerful influence in the midday hours. Stay protected!

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	10	very high	15 min
11:00	13	extreme	10 min
12:00	14	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 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 Casillas

Throughout the year, the UV Index experiences significant fluctuations, particularly peaking from January to April, where it reaches extreme levels of 11 to 15. These months are classified as high-risk, urging both visitors and residents to take extra precautions, as the burn time is just 10 minutes under direct sun exposure. As we move into November and December, the index dips slightly to 10, still classified as very high, but with a slightly longer burn time of 15 minutes. It’s crucial for everyone to incorporate protective measures such as sunscreen, hats, and protective clothing, especially during the high-risk months when the sun’s intensity can lead to skin damage in a short period.

Monthly Maximum UV Index for Casillas, Guatemala

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

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

Casillas's solar exposure compared to other cities in Guatemala. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Casillas	11	13	14	15	14	14	14	14	14	13	10	10
Petapa UVI	11	13	14	15	14	14	14	14	14	13	10	10
Villa Nueva UVI	11	13	14	15	14	14	14	14	14	13	10	10
Mixco UVI	11	13	15	15	14	14	14	14	14	13	11	10
Guatemala City UVI	11	13	15	15	14	14	14	14	14	13	11	10
San Juan Sacatepequez UVI	11	13	15	15	14	14	15	14	14	13	11	10