UV Index in San Antonio, Mexico

Last updated: May 3, 2025

In San Antonio, Mexico, being aware of the UV Index is crucial for safeguarding your skin and overall health. With peak UV levels frequently reaching as high as 14 during mid-afternoon, understanding these levels can help you prevent painful sunburns and long-term skin damage. Given the area's warm climate and abundant sunlight, knowledge of the UV Index will empower residents and visitors alike to take necessary precautions during the sunniest hours of the day. Stay informed and protect your skin in this vibrant corner of Mexico!

Hourly UV Index in San Antonio

The UV Index throughout the day paints a vivid picture of sun intensity, peaking dramatically around noon. Starting at a modest 1 at 7:00 AM, the index gently climbs to 3 by 9:00 AM, before hitting a striking 6 at 10:00 AM. As the sun rises higher, the UV Index reaches its zenith at 12:00 PM with a blistering score of 12, and then surges to a peak of 14 by 1:00 PM. The intensity begins to wane in the afternoon, dropping to 11 at 3:00 PM and further declining to 4 by 5:00 PM. As evening approaches, a safe 2 is reached by 6:00 PM, and the day ends with a gentle 1 by 7:00 PM. It’s a clear reminder to stay protected during the peak hours when the sun’s rays are at their 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	1	low	45 min
08:00	1	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	12	extreme	10 min
13:00	14	extreme	10 min
14:00	13	extreme	10 min
15:00	11	extreme	10 min
16:00	8	very high	15 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in San Antonio

The UV Index experiences significant seasonal changes, peaking in the spring and summer months. From January to February, the UV Index rises from 10 to 11 and remains in the extreme category through to October, reaching a maximum of 14 in April, May, and June. Notably, March through October are particularly high-risk months for UV exposure, where the burn time is as short as 10 minutes. Conversely, as the year progresses into November and December, the UV Index decreases to 10 and 9, indicating a return to the very high category, with burn times extending to 15 minutes. Visitors and residents should take preventative measures by wearing sunscreen, protective clothing, and limiting sun exposure during peak hours, especially during the high-risk months of March through October.

Monthly Maximum UV Index for San Antonio, Mexico

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

The table above highlights how UV exposure in San Antonio 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 Antonio'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
Guadalajara UVI	9	11	14	14	14	13	13	13	13	12	9	8
San Antonio	10	11	13	14	14	14	13	13	13	12	10	9
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