UV Index in San Fernando, Mexico

Last updated: August 1, 2025

Understanding the UV Index in San Fernando, Mexico is crucial for protecting your skin and maintaining overall health. With the region's BSh climate and high levels of sun exposure, being aware of UV levels can help you prevent sunburn and reduce long-term skin damage. Between 10 AM and 4 PM, UV exposure often peaks, reaching a maximum index of 12, making it essential to take precautions during these hours. Stay informed and safeguard your skin while enjoying the sun in San Fernando!

Hourly UV Index in San Fernando

As the sun rises, the UV Index slowly climbs, starting at a low 1 at 07:00 and 08:00. By 09:00, it slightly increases to 2. However, the real intensity kicks in as the day progresses, peaking at an impressive 12 between 13:00 and 14:00. This is the critical time when sun protection is essential, given the dangerous exposure level. As the afternoon wanes, the index starts to decrease, dropping to 10 by 15:00 and further declining to 5 at 17:00. Finally, as the sun sets, it returns to a mild 1 by 19:00. Take note of these fluctuations, as they are crucial for staying safe under the sun!

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	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	12	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in San Fernando

As the seasons change, so does the intensity of UV radiation, with the UV Index peaking from March through September. The months of February to September mark a high-risk period where the UV Index reaches extreme levels (11-12), particularly from March to August, indicating a burn time of only 10 minutes. Visitors and residents should remain vigilant during these months, taking precautions such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sun hours to minimize risk of skin damage. As the year transitions into fall and winter, the UV Index gradually decreases, offering a brief respite in December with a high exposure category of 6. Nonetheless, maintaining sun safety practices is advisable year-round.

Monthly Maximum UV Index for San Fernando, Mexico

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

The table above highlights how UV exposure in San Fernando 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 Fernando'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 Fernando	7	9	11	12	12	12	12	12	11	10	8	6
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