UV Index in El Cajon, Mexico

Last updated: July 2, 2025

In El Cajon, Mexico, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding UV levels can empower residents and visitors alike to make informed decisions about sun exposure, particularly in a region characterized by a dry and sunny climate typical of the BSk zone. With the UV Index peaking at a high 14 between noon and 2 PM, outdoor activities during these hours warrant caution. By staying informed about UV levels, you can protect your skin and enjoy all that El Cajon has to offer while minimizing the risks associated with excess sun exposure.

Hourly UV Index in El Cajon

As the sun rises, the UV Index begins at a modest 1 at 7:00 AM, gradually climbing to reach 2 by 9:00 AM. The intensity ramps up sharply, hitting 5 at 10:00 AM and soaring to a peak of 14 between 1:00 PM and 2:00 PM. It's critical to stay protected, especially during this prime time, as the UV Index touches a high of 12 at noon. Afterward, the index begins to decline, slipping to 9 by 4:00 PM and tapering off to 3 at 6:00 PM, before settling back down to a low of 1 by 7:00 PM. This data clearly highlights the urgency of sun safety during the midday hours when UV radiation is at its most intense.

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

Monthly UV Index Trends in El Cajon

The UV Index in the region exhibits significant seasonal fluctuations, peaking from February to October, with extremely high levels reached in March, April, May, June, July, August, and September, where the UV Index consistently registers at 14 to 15. These months carry a burn time of just 10 minutes, indicating a critical risk for sunburn and skin damage. Conversely, during January, November, and December, the UV Index falls to levels classified as very high (9 to 10), allowing for slightly longer exposure times of 15 minutes. Visitors and residents should exercise caution during the high-risk months (February through October), ensuring the use of sunscreen, protective clothing, and seeking shade during peak hours to safeguard against UV radiation.

Monthly Maximum UV Index for El Cajon, Mexico

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

The table above highlights how UV exposure in El Cajon 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 Cajon'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
El Cajon	9	12	14	15	15	14	14	14	14	12	10	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