UV Index in San Marcos, Mexico

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in San Marcos, Mexico, where the warm climate can lead to high levels of sun exposure. As the UV Index peaks with values reaching up to 13 during midday, awareness of these levels is essential for preventing sunburn and safeguarding skin health. With its Cwa climate, San Marcos experiences significant UV radiation risks, particularly in the summer months. By staying informed about the daily UV Index and taking protective measures, you can enjoy the sun while keeping your skin healthy and safe.

Hourly UV Index in San Marcos

As the day unfolds, the UV Index rises steadily, beginning at a safe 0 at 07:00 and peaking dramatically. By 10:00, it escalates to 4, signaling the need for some sun protection. The intensity reaches 10 at 12:00, and then hits its maximum at 13:00 with a formidable 12. Right after, it slightly dips but remains high at 12 until 15:00. As the afternoon wanes, the UV Index begins to decline, dropping to 9 by 16:00, and continuing its descent to 1 by 19:00. This fluctuation highlights the importance of being sun-smart during peak hours, especially between 11:00 and 15:00, when the sun is at its strongest.

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	4	moderate	30 min
11:00	7	high	25 min
12:00	10	very high	15 min
13:00	12	extreme	10 min
14:00	13	extreme	10 min
15:00	12	extreme	10 min
16:00	9	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

During the year, the UV Index experiences significant fluctuations, peaking in the late spring and summer months. From February to October, the UV Index reaches extreme levels, with maximum values of 14 in April, May, and June. High-risk months include March to October, particularly from April to July when burn times are as short as 10 minutes. Residents and visitors are strongly advised to take precautions during these months, such as wearing sunscreen, protective clothing, and seeking shade to reduce the risk of skin damage. In contrast, November to January sees a drop in UV intensity to very high, allowing for slightly longer burn times of 15 minutes but still requiring awareness and protection. Overall, maintaining sun safety is crucial throughout the year, especially during the peak months.

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	9	11	13	14	14	14	13	13	13	12	9	8
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