UV Index in San Diego de la Union, Mexico

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of San Diego de la Union, Mexico, where the BSk climate offers plenty of sunshine but also significant UV exposure risks. As the sun rises, UV levels can climb rapidly, peaking at a dangerously high index of 15 around midday. This underscores the importance of staying informed about UV levels for effective sunburn prevention and maintaining skin health. By knowing when to seek shade or apply sunscreen, you can enjoy the beauty of San Diego de la Union while protecting your skin from harmful rays.

Hourly UV Index in San Diego de la Union

The UV Index rises dramatically throughout the day, starting with a mild 1 at 07:00 and 08:00. By 09:00, it inches up to 2, but the real surge begins at 10:00, jumping to 5. The peak intensity hits at 12:00 with an impressive 13, escalating to a striking 15 from 13:00 to 14:00. As the afternoon wanes, the index begins to drop, reaching 9 at 16:00 before settling to 6 at 17:00. As the sun sets, the UV Index falls further to 3 at 18:00 and concludes the day at 1 by 19:00. It’s essential to protect your skin during those peak 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	2	low	45 min
10:00	5	moderate	30 min
11:00	9	very high	15 min
12:00	13	extreme	10 min
13:00	15	extreme	10 min
14:00	15	extreme	10 min
15:00	13	extreme	10 min
16:00	9	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 San Diego de la Union

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 de la Union, Mexico

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

The table above highlights how UV exposure in San Diego de la Union 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 de la Union'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
San Diego de la Union	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