UV Index in San Isidro, Mexico

Last updated: June 2, 2025

Understanding the UV Index is essential for residents and visitors in San Isidro, Mexico, where the sun shines strong in the BSh climate zone. With UV levels peaking at a concerning 12 during midday hours, being informed can help prevent sunburn and long-term skin damage. Awareness of these UV levels not only protects your skin but also encourages safer outdoor activities—vital to enjoying San Isidro’s beautiful weather. As the UV Index fluctuates throughout the day, staying alert to these changes can significantly enhance your sun safety practices.

Hourly UV Index in San Isidro

As the sun rises, the UV Index slowly climbs, starting at a low 1 at 07:00 and 08:00. By 09:00, it slightly increases to 2. However, the real intensity kicks in as the day progresses, peaking at an impressive 12 between 13:00 and 14:00. This is the critical time when sun protection is essential, given the dangerous exposure level. As the afternoon wanes, the index starts to decrease, dropping to 10 by 15:00 and further declining to 5 at 17:00. Finally, as the sun sets, it returns to a mild 1 by 19:00. Take note of these fluctuations, as they are crucial for staying safe under the sun!

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	8	very high	15 min
12:00	10	very high	15 min
13:00	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in San Isidro

The UV Index shows significant seasonal changes, with the highest levels occurring from April to September, where the index reaches an extreme level of 12. Notably, February and March also present high values of 8 and 10, respectively. The highest risk months for UV exposure are April through August, each with a burn time of only 10 minutes. Visitors and residents are advised to take precaution during these months by wearing sunscreen with a high SPF, donning protective clothing, and seeking shade during peak sun hours. In contrast, November and December offer lower UV levels with a burn time of 25 minutes, indicating a reduced risk. It is essential for everyone, particularly during high UV periods, to remain vigilant about sun safety.

Monthly Maximum UV Index for San Isidro, Mexico

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

The table above highlights how UV exposure in San Isidro 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 Isidro'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
San Isidro	6	8	10	12	12	12	12	12	11	10	7	6
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