UV Index in San Francisco (El Calvito), Mexico

Last updated: June 2, 2025

Understanding the UV Index in San Francisco (El Calvito), Mexico, is crucial for protecting your skin and maintaining overall health. The UV Index provides essential information about the intensity of ultraviolet radiation from the sun, which significantly influences your risk of sunburn and long-term skin damage. Typically characterized by a warm climate, San Francisco experiences varying UV levels throughout the day, peaking between 11 AM and 1 PM when readings soar above 11, indicating a high risk for harm without proper protection. By being aware of these UV levels, you can take proactive steps to safeguard your skin while enjoying the vibrant outdoor life that El Calvito has to offer.

Hourly UV Index in San Francisco (El Calvito)

During the early morning hours, the UV Index starts off low, peaking at only 1 at both 7:00 and 8:00. As the day progresses, sunlight intensifies, and by 9:00, the index jumps to 4. The sun reaches its zenith from 11:00 to 14:00, where the UV Index soars to a staggering 14 at 13:00, indicating extremely high levels of solar radiation. As afternoon turns to evening, the index gradually declines, dropping to 11 at 15:00, then down to 4 by 17:00 and finally waning to 1 again by 19:00. It's essential to stay protected during those peak hours, particularly between 11:00 and 14:00, when the sun's rays are at their most powerful!

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	4	moderate	30 min
10:00	7	high	25 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	14	extreme	10 min
14:00	13	extreme	10 min
15:00	11	extreme	10 min
16:00	7	high	25 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 Francisco (El Calvito)

Throughout the year, UV exposure levels vary significantly, with the highest risks occurring from February to October. During these months, the UV Index frequently reaches extreme levels, peaking at 15 in April through July, meaning that a burn can occur in just 10 minutes. It is crucial for visitors and residents to take precautions during these high-risk months, such as seeking shade, wearing protective clothing, and applying sunscreen liberally. Notably, January and November see a slightly lower UV Index of 10, categorized as very high, resulting in a burn time of 15 minutes. The least intense UV levels occur in December with an index of 9, but vigilance is still advised. Overall, awareness and proactive sun protection are essential to prevent harmful effects from UV radiation throughout the year.

Monthly Maximum UV Index for San Francisco (El Calvito), Mexico

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

The table above highlights how UV exposure in San Francisco (El Calvito) 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 Francisco (El Calvito)'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
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
San Francisco (El Calvito)	10	13	14	15	15	15	15	14	14	13	10	9