UV Index in Guanajuato, Mexico

Last updated: July 2, 2025

In Guanajuato, Mexico, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding local UV levels can help you take proactive measures against harmful ultraviolet radiation, especially during peak exposure times. With its semi-arid climate, Guanajuato experiences intense sunlight, particularly around midday when UV readings can soar to a staggering 14. By staying informed about the UV Index, residents and visitors alike can enjoy the region’s stunning outdoor beauty while protecting their skin from potential damage.

Hourly UV Index in Guanajuato

The UV Index today presents a dynamic range of exposure throughout the day, starting from a mild 1 at 07:00, which gradually escalates as the sun rises. By 09:00, the index ticks up to 3, hinting at a promising day ahead. The real peak arrives between 11:00 and 14:00, where it skyrockets to a sizzling 14 – a clear reminder to protect your skin from the sun’s powerful rays. As the afternoon wanes, the index begins its descent, dropping to 11 by 15:00 and tapering off to 2 by 18:00, before settling back to 1 as evening falls. Stay vigilant during the peak hours to enjoy a safe and sun-kissed day!

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	6	high	25 min
11:00	10	very high	15 min
12:00	13	extreme	10 min
13:00	14	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 Guanajuato

Throughout the year, the UV Index experiences notable seasonal changes, with the highest levels occurring from February to October. This period is characterized by an extreme risk of UV exposure, where the Index reaches a peak of 14 from April to July and remains high during surrounding months. January and November see a slight decrease to a very high exposure category, while December and October also become very high, with the UV Index dropping to 9. Visitors and residents are advised to take strict precautions, especially from February to October, when the burn time is as low as 10 minutes. It's essential to wear protective clothing, apply broad-spectrum sunscreen frequently, and seek shade during peak hours to minimize the risk of harmful UV radiation effects.

Monthly Maximum UV Index for Guanajuato, Mexico

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

The table above highlights how UV exposure in Guanajuato 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.

Guanajuato'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
Guanajuato	10	12	13	14	14	14	14	13	13	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