UV Index in Ascension, Mexico

Last updated: July 2, 2025

In Ascension, Mexico, staying informed about the UV Index is essential for protecting your skin and overall health. Understanding UV levels not only aids in preventing painful sunburns but also plays a crucial role in reducing the long-term risks of skin damage and related conditions. With a semi-arid climate (BSk) characterized by intense sunlight, residents and visitors to Ascension face elevated UV exposure, especially during midday hours when indices peak at a striking 12. Being aware of these levels empowers you to enjoy the sun safely while taking necessary precautions.

Hourly UV Index in Ascension

As the sun rises, the UV Index starts at a low 1 at 07:00, offering a safe environment for early risers. By 08:00, it edges up to 2, still remaining relatively mild. However, the tide begins to turn at 09:00 as it climbs to 3, marking the onset of more significant UV radiation. From 10:00 onward, the index surges dramatically, peaking at an intense 12 between 13:00 and 14:00—a critical window where sun protection becomes essential. After reaching its zenith, the UV levels begin a gradual decline, dropping to 10 at 15:00, and continuing to fall to just 1 by 19:00. This hourly data underscores the importance of vigilance during the midday hours when UV exposure is at its highest.

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	3	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	12	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 Ascension

Throughout the year, UV Index levels display significant seasonal changes, with the highest risks occurring from February to September. The months of April to September feature an extreme exposure category, peaking at UV Index 13 in May and June, where the burn time drops to just 10 minutes. Visitors and residents should be particularly cautious during these months and consider protective measures such as wearing sunscreen, hats, and protective clothing when outdoors. January, December, and November present moderate to high exposure levels, allowing for longer burn times of 25 to 30 minutes, yet sun protection remains advisable. As the UV Index varies dramatically throughout the year, staying informed and prepared is essential for safe outdoor activities.

Monthly Maximum UV Index for Ascension, Mexico

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

The table above highlights how UV exposure in Ascension 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.

Ascension'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
Ascension	5	8	10	12	13	13	12	12	11	9	7	5
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