UV Index in San Diego, Mexico

Last updated: July 2, 2025

In San Diego, Mexico, staying informed about the UV Index is crucial for safeguarding your skin health and preventing sunburn. With a climate characterized by abundant sunshine and warm temperatures, understanding the daily UV levels can help you make informed decisions about sun protection. During peak hours, the UV Index can soar to heights of 15, posing significant risks for skin damage if proper precautions aren’t taken. By being aware of the UV Index in San Diego, you can enjoy the sunshine while prioritizing your well-being.

Hourly UV Index in San Diego

The UV index for the day showcases a dramatic rise in sun intensity as the hours progress. Starting at a mild 1 during the early morning (7:00 AM), the index remains low until 9:00 AM when it reaches 3. However, by 10:00 AM, it soars to 7, heralding a sunny peak ahead. The afternoon sees an impressive climb, peaking at a maximum of 15 at 1:00 PM—the most critical time for sun exposure—before gradually tapering off to 11 by 3:00 PM and falling to 1 by nighttime. This data underscores the importance of sun safety measures during the vibrant midday hours!

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	7	high	25 min
11:00	10	very high	15 min
12:00	13	extreme	10 min
13:00	15	extreme	10 min
14:00	14	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 Diego

The UV Index exhibits significant seasonal changes, with high-risk months from February to October, where values reach extreme levels (UV Index 13-15) for most of the period, resulting in a quick burn time of just 10 minutes. January and November present a slightly lower risk with very high exposure (UV Index 10) and a burn time of 15 minutes, while December sees a marginally decreased risk (UV Index 9). Visitors and residents are strongly advised to take protective measures during these high-risk months, such as wearing sunscreen with a high SPF, donning protective clothing, and seeking shade, particularly during midday hours when UV radiation is at its peak. Being proactive can greatly mitigate the risks associated with UV exposure throughout the year.

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
San Diego	10	13	14	15	14	14	15	14	14	13	10	9
Puebla UVI	10	12	14	15	15	15	15	14	14	13	10	9