UV Index in Cal y Mayor, Mexico

Last updated: June 2, 2025

In Cal y Mayor, Mexico, awareness of the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels not only helps in preventing painful sunburns but also plays a vital role in reducing the long-term risks of skin cancer. With a warm Aw climate, residents and visitors face heightened UV exposure, especially during midday hours when the index can peak at a staggering 13. By staying informed about the UV Index, you can better protect yourself during those intense sun hours and enjoy the beautiful weather safely.

Hourly UV Index in Cal y Mayor

As the day unfolds, the UV Index reveals a dynamic shift in sun exposure. Early hours see a gentle start, with values of 1 at both 07:00 and 08:00. However, by 09:00, it climbs to 3, signaling an increase in UV intensity. The real peak occurs around midday, where the index soars to a scorching 12 at 12:00 and reaches its zenith with a striking 13 at 13:00 and 14:00—a reminder to seek shade and protect your skin. The intensity gradually wanes, dipping to 10 by 15:00 and then descending to 4 at 17:00, before evening settles in with a gentle 2 at 18:00 and returning to 1 by 19:00. Balancing safety with sun enjoyment is key as the day transitions from peak exposure to the soothing dusk.

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	9	very high	15 min
12:00	12	extreme	10 min
13:00	13	extreme	10 min
14:00	13	extreme	10 min
15:00	10	very high	15 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 Cal y Mayor

Throughout the year, UV index levels fluctuate significantly, peaking during the late spring and summer months. From February to October, the UV index consistently remains in the extreme category, with the highest readings in April, May, June, and July, all reaching a UV index of 14 and a burn time of just 10 minutes. As such, March through October is deemed the high-risk period for skin damage and sunburn. Visitors and residents are strongly advised to take precautions, including wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade—especially during midday hours—to reduce the risk of harmful UV exposure. In contrast, November and December see a decrease in UV levels, transitioning to a very high category, but it’s still important to stay vigilant as burn times extend to 15 minutes.

Monthly Maximum UV Index for Cal y Mayor, Mexico

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

The table above highlights how UV exposure in Cal y Mayor 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.

Cal y Mayor'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
Cal y Mayor	9	12	13	14	14	14	14	13	13	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