UV Index in Rosario, Mexico

Last updated: July 2, 2025

Understanding the UV Index in Rosario, Mexico is crucial for safeguarding your skin against the sun's harmful rays. With high UV levels peaking around midday—reaching a maximum of 12—it’s vital to be aware of potential sunburn risks and long-term skin health effects. Rosario's BSh climate not only brings warm temperatures but also a significant likelihood of intense sun exposure, particularly between 10 AM and 2 PM. By staying informed about UV levels, you can take proactive steps to protect yourself and enjoy the sunny weather safely.

Hourly UV Index in Rosario

The UV Index today tells a dramatic story of sunlight intensity as the day progresses. Starting off gently at 1 by 7:00 AM, the sun begins its ascent and the index surges, reaching a moderate 3 by 8:00 AM. As we approach 9:00 AM, it climbs to 6, signifying that sunscreen might be wise. But the real heat kicks in at 10:00 AM with a striking 8, soaring to a peak of 12 between 12:00 PM and 1:00 PM—a serious warning to take protective measures. The afternoon sees a gradual decline as the index drops to 10 at 2:00 PM, and then steadily decreases through the later hours, settling back to 1 by 7:00 PM. Stay informed and protect your skin during those peak hours!

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	3	moderate	30 min
09:00	6	high	25 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Rosario

Throughout the year, UV exposure varies significantly, peaking during the summer months from April to September, where the UV Index reaches an extreme category of 12, allowing for a burn time of just 10 minutes. Visitors and residents should be particularly cautious in the high-risk months of February through September, with March to August being the peak months for very high and extreme exposure. During these periods, it's crucial to apply sunscreen frequently, wear protective clothing, and seek shade to reduce the risk of harmful sunburns. As the seasons shift, January and November see a high exposure risk, while December has a moderate level of UV, making it essential to stay vigilant regardless of the month.

Monthly Maximum UV Index for Rosario, Mexico

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

The table above highlights how UV exposure in Rosario 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.

Rosario'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
Rosario	6	8	10	12	12	12	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