UV Index in California, Mexico

Last updated: July 2, 2025

In the sun-soaked region of California, Mexico, staying aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels helps you take preventive measures against sunburn and long-term skin damage, allowing you to enjoy the outdoors while safeguarding your well-being. With California's BSk climate, known for its dry, sunny days, the potential for intense UV exposure, particularly during peak hours from 11 AM to 2 PM when levels can reach a staggering 14, makes vigilance essential. Whether you’re lounging on the beach or hiking in the hills, keeping an eye on the UV Index empowers you to relish the radiant sunshine without compromising your skin’s health.

Hourly UV Index in California

As the sun rises, the UV Index begins to climb steadily, starting from a gentle 0 at 7:00 AM before reaching a modest 1 by 8:00 AM. By 9:00 AM, it picks up pace, hitting 2, and then escalates dramatically through the late morning. At 10:00 AM, the index spikes to 5, soon soaring to a peak of 14 from 1:00 PM to 2:00 PM, marking the day’s most intense exposure. The afternoon witnesses a gradual decline, settling at 10 by 4:00 PM and tapering off to a more manageable 3 by 6:00 PM. As the sun begins to set, the UV intensity eases into the evening, leaving behind a trace of 1 at 7:00 PM. Stay protected, especially during the peak hours, and enjoy the sunshine responsibly!

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	8	very high	15 min
12:00	11	extreme	10 min
13:00	14	extreme	10 min
14:00	14	extreme	10 min
15:00	13	extreme	10 min
16:00	10	very high	15 min
17:00	6	high	25 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in California

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 California, Mexico

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

The table above highlights how UV exposure in California 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.

California'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
California	9	11	14	15	15	14	14	14	14	12	10	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