UV Index in San Diego, Mexico

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of San Diego, Mexico, where the sun's rays can be particularly intense. With UR levels peaking at 14 during midday, it's essential to grasp how these levels can affect your skin health and lead to sunburn if proper precautions aren’t taken. The BSk climate of San Diego means plenty of sunny days, increasing exposure risks throughout the year. By staying informed about the UV Index, you can enjoy outdoor activities while protecting yourself from potential harm.

Hourly UV Index in San Diego

The UV Index throughout the day presents a vivid picture of solar intensity, peaking at an impressive 14 between 1 PM and 2 PM. Starting from 0 at 7 AM, it gradually climbs, reaching 12 by noon and hitting its maximum just after. As the afternoon wanes, the index begins to taper off, dropping to 10 at 4 PM, and descending further to 3 by 6 PM. By 7 PM, the UV Index is a mere 1, signaling a gentle close to a sun-soaked day. This data underscores the importance of sun protection during peak hours, particularly from 11 AM to 3 PM, where caution is paramount to avoid harmful UV exposure.

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.
TimeUVICategoryTime to Burn
07:000low45 min
08:001low45 min
09:002low45 min
10:005moderate30 min
11:009very high15 min
12:0012extreme10 min
13:0014extreme10 min
14:0014extreme10 min
15:0013extreme10 min
16:0010very high15 min
17:006high25 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in San Diego

The UV Index demonstrates significant seasonal changes, peaking during the late spring and summer months. From January to March, the index starts high but quickly escalates, reaching its maximum of 15 in both April and May. The months of February to October pose the highest risk, with an extreme exposure category, where the burn time is notably short at 10 minutes. Visitors and residents should be particularly vigilant during these high-risk months, especially from February to October, and adopt protective measures such as wearing sunscreen, hats, and protective clothing. As we approach the fall and winter months, the UV risk decreases but remains notably high in November and December. It is essential to stay informed and protect your skin year-round.

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.
JanFebMarAprMayJunJulAugSepOctNovDec9121415151414141412108
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.
 JanFebMarAprMayJunJulAugSepOctNovDec
Guadalajara UVI911141414131313131298
San Diego9111415151414141412108
Iztapalapa UVI10121415141414141412108
Ecatepec de Morelos UVI10121415151414131412108
Mexico City UVI10121415151414131412108
Puebla UVI10121415151515141413109