UV Index in Santo Tomas, El Salvador

Last updated: July 2, 2025

Understanding the UV Index is essential for the residents and visitors of Santo Tomas, El Salvador, as it directly relates to sun exposure and skin health in this vibrant tropical climate. Given the area's typical high UV levels—peaking at a staggering 13 around midday—awareness can play a crucial role in preventing sunburns and long-term skin damage. With UV radiation intensifying from morning until afternoon, being informed about the current UV Index not only helps you enjoy the sun safely but also protects your skin from harmful effects. Stay vigilant and embrace the sunny days with the right precautions!

Hourly UV Index in Santo Tomas

The UV Index for the day demonstrates a significant rise and fall in intensity, peaking sharply at 11:00 AM and 12:00 PM with a staggering 13. Early in the morning, from 7:00 AM to 8:00 AM, the index starts low at 1, gradually increasing to 3 by 8:00 AM. As the sun climbs higher, a rapid escalation occurs, reaching 10 by 10:00 AM and hitting its maximum at noon. After this peak, the index begins to decline, dropping steadily to 9 at 2:00 PM, and later retreating to 1 by 5:00 PM. By 7:00 PM, the UV Index has faded to 0, reminding us of the crucial midday hours to protect our skin from UV exposure.

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	7	high	25 min
10:00	10	very high	15 min
11:00	13	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	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 Santo Tomas

The UV Index clearly demonstrates a pattern of extreme sun exposure from January through July. The highest values peak in March to June, with an index of 14, indicating the most critical months for UV risk. As summer transitions into fall, the index gradually decreases but remains at a high level through August and September. Notably, November and December present a slight reduction to very high levels, with a burn time of 15 minutes. Residents and visitors should take precautionary measures during these high-risk months, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade to minimize UV exposure and prevent sunburn.

Monthly Maximum UV Index for Santo Tomas, El Salvador

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Santo Tomas. 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 Santo Tomas, 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 Santo Tomas UV Index with Other El Salvador Cities

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

Santo Tomas's solar exposure compared to other cities in El Salvador. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Santo Tomas	11	12	14	14	14	14	13	13	13	13	10	9
Mejicanos UVI	11	12	14	14	14	14	13	13	13	13	10	9
Soyapango UVI	11	12	14	14	14	14	13	13	13	13	10	9
San Salvador UVI	11	12	14	14	14	14	13	13	13	13	10	9
San Miguel UVI	11	12	14	14	14	14	13	13	13	13	10	9
Santa Ana UVI	11	13	14	14	14	14	14	13	13	13	10	9