UV Index in El Letrero, Mexico

Last updated: May 3, 2025

In El Letrero, Mexico, being aware of the UV Index is crucial for protecting your skin and overall health. With the region's warm Aw climate, intense sun exposure can lead to sunburn and increase the risk of skin damage, making it essential to understand UV levels throughout the day. From moderate levels in the morning to extreme peaks around noon, knowing when to seek shade or apply sunscreen can significantly reduce your risk of adverse effects. By staying informed about the daily UV Index, you can enjoy the sunny beauty of El Letrero safely and sustainably.

Hourly UV Index in El Letrero

The UV Index throughout the day reveals a dynamic and intense sun exposure pattern. Starting off slowly at 0 at 7:00 AM, the levels gradually increase, reaching 2 by 9:00 AM. However, the real surge occurs between 10:00 AM and 1:00 PM, where the index peaks at a striking 13 during both 1:00 PM and 2:00 PM, indicating a high risk of harm from unprotected sun exposure. As the afternoon progresses, the index begins to decline, dropping to 8 by 4:00 PM, further decreasing to 1 by 7:00 PM. This hourly data underscores the importance of sun safety measures during peak hours when UV rays are at their strongest. 🌞

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	0	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	8	very high	15 min
12:00	11	extreme	10 min
13:00	13	extreme	10 min
14:00	13	extreme	10 min
15:00	11	extreme	10 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 El Letrero

Throughout the year, the UV Index demonstrates significant seasonal fluctuations, with the highest values occurring during the summer and early fall months. Notably, from February to October, the UV index remains in the extreme category, peaking at 14 in April, June, July, and September. This period constitutes the high-risk months, where burn times are alarmingly short, limited to just 10 minutes. Conversely, January, November, and December see lower UV ratings classified as very high, with slightly longer burn times of 15 minutes. To ensure safety, visitors and residents are advised to take precautions during the high-risk months by wearing protective clothing, applying sunscreen, and seeking shade, especially during midday hours.

Monthly Maximum UV Index for El Letrero, Mexico

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

The table above highlights how UV exposure in El Letrero 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.

El Letrero'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
El Letrero	9	11	13	14	13	14	14	13	14	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