UV Index in Casillas, Guatemala

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Casillas, Guatemala, where the sun shines brightly in the tropical climate. With levels soaring as high as 14 during midday hours, awareness of UV exposure is essential for preventing sunburn and safeguarding skin health. Knowledge of when to seek shade or apply sunscreen can make a significant difference, especially in a region known for its strong UV radiation risks. Stay vigilant and protect your skin while enjoying the beauty of Casillas!

Hourly UV Index in Casillas

The UV Index today showcases a dramatic rise in solar intensity, starting with a moderate level of 2 at 7:00 AM. As the sun climbs higher in the sky, the intensity peaks at a staggering 14 by noon, marking the most hazardous time for sun exposure. It reaches a maximum of 13 at 1:00 PM, emphasizing the need for protective measures like sunscreen and hats. The afternoon sees a swift decline, dropping to 10 by 2:00 PM and further down to 6 at 3:00 PM. As evening approaches, the UV Index dips to 1 by 5:00 PM, offering some relief, before finally settling at 0 after 7:00 PM. For those planning their day, early morning and late evening provide a safer window for outdoor activities, while midday requires caution to avoid overexposure.

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	7	high	25 min
10:00	11	extreme	10 min
11:00	13	extreme	10 min
12:00	14	extreme	10 min
13:00	13	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