UV Index in Lerma, Mexico

Last updated: June 2, 2025

Understanding the UV Index in Lerma, Mexico is crucial for protecting your skin health and preventing sunburn. With its high altitudes and consistent sunshine, Lerma presents unique UV exposure risks throughout the day. As the index peaks around midday, reaching levels as high as 13, awareness of these UV levels is essential for everyone, from outdoor enthusiasts to everyday residents. By staying informed about the UV Index, you can take proactive steps to safeguard your skin, ensuring a safer and healthier experience under the sun.

Hourly UV Index in Lerma

The UV Index today showcases a dramatic rise in sun exposure as the day progresses. Starting at 7:00 AM with a mild value of 1, the index climbs steadily to reach 4 by 9:00 AM. However, it's around 11:00 AM that the UV radiation peaks at 10, escalating further to a maximum of 12 at noon. The sun’s intensity continues to be fierce, reaching a high of 13 by 1:00 PM before gradually tapering off. From 2:00 PM, the index starts its descent, hovering at 12 and then dropping to 9 by 3:00 PM. As the afternoon transitions into evening, the UV levels diminish significantly, resting at 1 by 7:00 PM. For anyone spending time outdoors, taking precautions during the peak hours is crucial to ensure safety from harmful UV rays.

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	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	10	very high	15 min
12:00	12	extreme	10 min
13:00	13	extreme	10 min
14:00	12	extreme	10 min
15:00	9	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Lerma

Throughout the year, UV levels in the area exhibit significant seasonal variations, with the highest risks occurring during the spring and summer months. From March to October, the UV Index reaches extreme levels of 13, necessitating shortened burn times of just 10 minutes. Conversely, January, February, November, and December register a very high UV Index of 8 to 10, allowing slightly longer burn times of 15 minutes. Visitors and residents are strongly advised to take protective measures during the high-risk months, especially from March to September, by wearing sunscreen, protective clothing, and seeking shade during peak hours to minimize the risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for Lerma, Mexico

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

The table above highlights how UV exposure in Lerma 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.

Lerma'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
Lerma	8	10	13	13	13	13	13	13	12	11	9	8
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