UV Index in Rosario, Argentina

Last updated: February 8, 2026

In Rosario, Argentina, staying informed about the UV Index is crucial for your skin health and overall well-being. Understanding UV levels helps you take proactive steps to prevent sunburn and reduce the risk of long-term skin damage. With a Cfa climate, Rosario experiences significant UV exposure, especially during peak hours when the index reaches levels 4. This highlights the importance of sun safety measures, ensuring that residents and visitors alike can enjoy the sunshine while effectively safeguarding their skin.

Hourly UV Index in Rosario

The UV Index skyrockets as the sun climbs higher, peaking at 12:00 PM with a level of 4, indicating a moderate risk of harm from unprotected sun exposure. As the daylight progresses, 07:00 starts at a cool 0, gradually rising to 1 by 08:00 and 09:00. By 10:00, it hits 2, and by 11:00, it reaches 3, setting the stage for that midday high. Later in the afternoon, from 12:00 to 14:00, the index maintains its strength at 4, before gently tapering off as the sun begins to set. By 19:00, it’s back to 0, marking the end of a sun-filled day. Stay protected 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	60+ minutes
08:00	1	low	60+ minutes
09:00	3	moderate	30–60 min
10:00	6	high	15–30 min
11:00	9	very high	10–15 min
12:00	12	extreme	<10 minutes
13:00	13	extreme	<10 minutes
14:00	12	extreme	<10 minutes
15:00	10	very high	10–15 min
16:00	7	high	15–30 min
17:00	4	moderate	30–60 min
18:00	2	low	60+ minutes
19:00	1	low	60+ minutes

Monthly UV Index Trends in Rosario

The UV Index exhibits significant seasonal fluctuations, with January, February, March, October, November, and December classified as high-risk months due to extreme levels, where a mere 10 minutes of exposure can lead to sunburn. April transitions to very high exposure with a 15-minute burn time, while May and June see a drop to moderate levels, allowing for safer exposure of 30 minutes. As summer progresses, July maintains a moderate index, but the risk increases again in August with a high category and a burn time of 25 minutes. September returns to very high levels, emphasizing caution. Visitors and residents should exercise heightened vigilance during these high-risk months by applying sunscreen, wearing protective clothing, and seeking shade, particularly from late fall through early spring when UV exposure remains dangerously high.

Monthly Maximum UV Index for Rosario, Argentina

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 Argentina Cities

The table above highlights how UV exposure in Rosario 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.

Rosario'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	14	13	11	8	5	4	4	6	8	11	13	14
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