UV Index in San Diego, Mexico

Last updated: July 2, 2025

In San Diego, Mexico, awareness of the UV Index is essential for safeguarding your skin health and preventing sunburn. With its Cwb climate, this vibrant locale features sunny days and high UV exposure, particularly during peak hours when the UV Index can soar to 14—very high levels that demand attention. Understanding these UV levels is crucial; being informed empowers you to take protective measures, ensuring you enjoy the sun safely while protecting your skin from its harmful effects. Stay vigilant and embrace the beauty of San Diego responsibly!

Hourly UV Index in San Diego

The UV Index for the day showcases a dramatic rise in intensity as the sun climbs higher in the sky. Starting from a calm 0 at 07:00, it gradually ticks upward, reaching 1 by 08:00. As the clock strikes 10:00, the UV Index surges to 5, and by 11:00, it climbs to a robust 9. The peak occurs at 13:00 and 14:00, where it hits a thrilling 14—a clear warning for sun protection. As the afternoon wanes, the intensity begins to drop, falling to 9 by 16:00, and further down to 5 at 17:00. The day wraps up with a gentle decline, ending with a low 1 by 19:00. As such, it’s essential to stay vigilant during the peak hours, particularly between 11:00 and 14:00, to enjoy the sun safely!

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	9	very high	15 min
12:00	12	extreme	10 min
13:00	14	extreme	10 min
14:00	14	extreme	10 min
15:00	12	extreme	10 min
16:00	9	very high	15 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in San Diego

Throughout the year, the UV Index demonstrates significant seasonal changes, peaking between March and September with values consistently classified as extreme (UV Index 15) and requiring minimal exposure for skin protection. The highest risk months are March, April, May, and September, where the UV Index reaches 15, indicating a burn time of just 10 minutes. Even in January and November, the UV Index remains high at 10, requiring careful sun exposure management. Visitors and residents are advised to take precautions during these high-risk months by wearing sunscreen, protective clothing, and seeking shade to minimize the risk of skin damage. Remember, even on cloudy days, UV radiation can still be intense, so staying vigilant is key.

Monthly Maximum UV Index for San Diego, Mexico

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

The table above highlights how UV exposure in San Diego 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 Diego'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 Diego	10	12	15	15	15	14	14	14	15	12	10	9