UV Index in Merlo, Argentina

Last updated: July 2, 2025

Understanding the UV Index in Merlo, Argentina is crucial for safeguarding your skin and overall health. The UV Index provides essential information about sun exposure risks, helping residents and visitors alike prevent sunburn and long-term skin damage. With Merlo's semi-arid climate (BSk), UV levels can peak in the afternoon hours, reaching values as high as 5 between 1 PM and 2 PM, making it vital to stay informed and protected during these times. By keeping an eye on the UV Index, you can enjoy the beautiful outdoors while minimizing the risks associated with excessive sun exposure.

Hourly UV Index in Merlo

Starting off the day, the UV Index remains at a cool 0 from 07:00 to 08:00, perfect for early risers. Gradually, the sun begins to climb higher, nudging the index up to 1 by 09:00 and 10:00. By 11:00, it peaks to 3, signaling more intense exposure ahead. Noon brings a noticeable increase as the UV Index hits 4, and by 13:00 and 14:00, it reaches its maximum of 5, indicating a higher risk of harm from unprotected sun exposure. Thankfully, by 15:00, it dips slightly to 4 and continues to decline to 2 at 16:00. As evening approaches, the index stabilizes at 1 through 18:00, before returning to 0 at 19:00. Whether you're seeking shade or planning to bask in the sun, keep the UV Index in mind for your day's activities! 🌞

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	0	low	45 min
09:00	1	low	45 min
10:00	1	low	45 min
11:00	3	moderate	30 min
12:00	4	moderate	30 min
13:00	5	moderate	30 min
14:00	5	moderate	30 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Merlo

Throughout the year, UV levels fluctuate significantly, with high-risk months spanning from January to April and again in October to November, where the UV Index reaches extreme levels of 15 and 14, respectively, resulting in a rapid burn time of only 10 minutes. From March to September, the exposure remains a concern, particularly in April and September when the index is rated very high (8 and 9), allowing for 15 to 25 minutes of safe exposure. Advise visitors and residents to take precautionary measures during these peak months, such as seeking shade, wearing protective clothing, and using sunscreen with a high SPF, especially between 10 a.m. and 4 p.m. when the sun is strongest. Staying vigilant about UV exposure throughout the year is essential for maintaining skin health.

Monthly Maximum UV Index for Merlo, Argentina

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

The table above highlights how UV exposure in Merlo compares to other major locations across Argentina. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Merlo's solar exposure compared to other cities in Argentina. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Buenos Aires UVI	14	13	11	7	5	4	4	6	8	10	13	14
Rosario UVI	14	13	11	8	5	4	4	6	8	11	13	14
Merlo	15	14	12	8	6	4	5	7	9	12	14	15
Mendoza UVI	15	14	12	8	6	4	5	6	9	12	14	15
Cordoba UVI	15	13	12	9	6	4	5	7	9	12	14	15
San Miguel de Tucuman UVI	15	14	13	10	7	5	6	7	10	13	15	15