UV Index in San Marcos, Mexico

Last updated: June 2, 2025

In San Marcos, Mexico, being aware of the UV Index is essential for safeguarding your skin from harmful sun exposure. Understanding UV levels not only helps in preventing painful sunburns but also plays a critical role in long-term skin health. With a dry semi-arid climate (BSk), San Marcos experiences significant UV radiation, peaking at an alarming Index of 14 during midday hours. This means that even a short time in the sun without protection can lead to adverse effects. Stay informed and proactive about UV exposure to ensure your sunny days are both enjoyable and safe!

Hourly UV Index in San Marcos

The UV Index for the day paints a vivid picture of solar intensity. Starting off at 0 at 07:00, the sun gradually warms up, hitting 2 by 09:00. As the clock strikes 10:00, the index surges to a notable 5, marking the beginning of peak sun exposure. Things heat up significantly by 11:00, peaking at an impressive 14 by 14:00—the zenith of UV intensity. After this, a gentle decline begins, with the index easing to 12 at 15:00 and tapering off to 6 by 17:00. As the day winds down, the UV Index further drops to 3 by 18:00 and concludes with a 1 at 19:00—a gentle reminder to enjoy the sun wisely!

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	0	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	11	extreme	10 min
13:00	13	extreme	10 min
14:00	14	extreme	10 min
15:00	12	extreme	10 min
16:00	10	very high	15 min
17:00	6	high	25 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in San Marcos

The UV index varies significantly throughout the year, with the highest values observed from March to October, reaching an extreme level of 14 during the summer months (May through August). Visitors and residents should be particularly cautious from February to October, where burn times are as short as 10 minutes due to the extreme exposure category. January and November present a slightly lower UV index, categorized as very high, with a burn time of 15 minutes. By December, the UV index decreases to 7, making exposure risks lower, with a burn time of 25 minutes. It is essential for everyone to take protective measures against UV radiation, especially during the high-risk months, by wearing sunscreen, protective clothing, and seeking shade.

Monthly Maximum UV Index for San Marcos, Mexico

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

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

San Marcos's solar exposure compared to other cities in Mexico. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
San Marcos	8	11	13	14	14	14	14	14	13	12	9	7
Guadalajara UVI	9	11	14	14	14	13	13	13	13	12	9	8
Iztapalapa UVI	10	12	14	15	14	14	14	14	14	12	10	8
Ecatepec de Morelos UVI	10	12	14	15	15	14	14	13	14	12	10	8
Mexico City UVI	10	12	14	15	15	14	14	13	14	12	10	8
Puebla UVI	10	12	14	15	15	15	15	14	14	13	10	9