UV Index in San Isidro, Mexico

Last updated: July 2, 2025

Understanding the UV Index is essential for residents and visitors in San Isidro, Mexico, where the sun’s rays can be deceptively intense. With peak UV levels soaring to 15, awareness can play a crucial role in preventing sunburn and protecting your skin health. The climate in San Isidro, characterized by its Cwb zone, leads to significant UV exposure during midday hours, making it vital to stay informed and take precautions. By keeping an eye on the UV Index, you can enjoy the sun safely while safeguarding your skin from harmful effects.

Hourly UV Index in San Isidro

The UV Index for the day presents a striking pattern of intensity as the sun rises and reaches its zenith. Beginning at 1 at 07:00 and 08:00, the index gradually climbs to 3 by 09:00. As the morning progresses, it spikes dramatically, peaking at an impressive 15 from 13:00 to 14:00. This period of high UV exposure, highlighted by a maximum of 13 at 12:00, underscores the potential risks for outdoor activities without proper protection. Following this peak, the index gracefully declines, dipping to 9 at 16:00 and tapering off to 1 again by 19:00. It’s a reminder to embrace the sun wisely, prioritizing skin safety during those mid-afternoon 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	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	12	extreme	10 min
16:00	9	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 seasonal UV changes indicate that from January to March, UV exposure begins high, escalating to extreme levels by April. The peak UV Index occurs in July at 15, maintaining extremely high levels throughout the summer months with minimal fluctuations. High-risk months include February through August, where the UV Index remains between 12 and 15, necessitating careful sun protection measures. Visitors and residents are strongly advised to limit sun exposure, especially during peak hours, wear protective clothing, use broad-spectrum sunscreen, and seek shade to minimize the risk of sunburn and skin damage. In contrast, November and December see a drop in the UV Index to 10 and 9, respectively, representing a relatively safer time for sun exposure, though caution is still recommended.

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
Guadalajara UVI	9	11	14	14	14	13	13	13	13	12	9	8
San Isidro	10	12	13	14	14	14	15	13	14	12	10	9
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