UV Index in San Julian, Mexico

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of San Julian, Mexico, where the sun’s rays can be particularly intense due to its Cwa climate. Being aware of UV levels not only helps in preventing painful sunburns but also plays a vital role in long-term skin health. With midday UV indices soaring to 15, it's essential to recognize the risks associated with prolonged sun exposure. Given San Julian's sunny disposition, taking proactive measures to protect your skin is key to enjoying all that this vibrant region has to offer while staying safe in the sun.

Hourly UV Index in San Julian

The daily UV Index chart showcases the sun's intensity as the day unfolds. Starting from a gentle 0 at 7:00 AM, the index gradually climbs, reaching 1 by 8:00 AM. As the morning progresses, it gains momentum, hitting 5 at 10:00 AM. The peak intensity occurs at 12:00 PM with an impressive 12, followed closely by the highest reading of 15 at 2:00 PM, making this the most critical time for sun exposure. As the afternoon turns to evening, the UV Index declines, dropping to 10 by 4:00 PM, and further easing to 1 by 7:00 PM. This data highlights the importance of sun protection, especially during the midday hours when the UV levels are at their 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	0	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	15	extreme	10 min
15:00	13	extreme	10 min
16:00	10	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 San Julian

As the seasons change, the UV Index reflects significant variations in sun exposure risk throughout the year. The high-risk months start in February and continue through October, where the UV Index consistently falls within the extreme category, reaching a peak of 15 in April and May. During these months, the recommended burn time is reduced to just 10 minutes, highlighting the urgency for protective measures. In contrast, November and December see a slight decline in UV levels, but the very high exposure category remains, especially in January with an index of 9. It is crucial for both visitors and residents to take precautionary measures during these months, such as wearing sunscreen, protective clothing, and sunglasses, to minimize the risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for San Julian, Mexico

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

The table above highlights how UV exposure in San Julian 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.

San Julian'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
San Julian	9	11	14	15	15	14	13	14	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