UV Index in Rosario, Argentina

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Rosario, Argentina, where sunshine and warm weather are common. Monitoring UV levels is essential not only for preventing sunburn but also for maintaining long-term skin health. In Rosario's Cfa climate, typical summer days can present heightened UV exposure risks, particularly during midday hours when the UV Index peaks at 4 between 12:00 PM and 1:00 PM. Staying informed and taking protective measures can help ensure you enjoy the sun safely while minimizing the risk of harmful UV effects.

Hourly UV Index in Rosario

The UV Index throughout the day reveals a dynamic pattern of sun intensity. In the morning, it starts off low, peaking at 1 by 09:00. As the sun climbs higher, we see a steady increase with the index reaching 3 by 11:00. The highest point occurs from 12:00 to 13:00, where the UV Index hits a robust 4, indicating a need for sun protection during those hours. Following this peak, the index gradually declines, returning to 2 at 15:00, and then dropping back down to 0 by 18:00, marking the end of significant UV exposure for the day. Plan your outdoor activities accordingly to stay safe under the sun!

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

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