UV Index in Rosario, Uruguay

Last updated: August 1, 2025

In Rosario, Uruguay, staying informed about the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels helps in preventing sunburns and long-term skin issues, especially in a region with a Cfa climate that often brings intense sunlight. With midday UV Index values peaking at 4, it's essential to take protective measures during the warmest parts of the day. Awareness of these risks empowers you to enjoy the sun responsibly while minimizing its potential harm. Stay sun-safe, Rosario!

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	2	low	45 min
10:00	3	moderate	30 min
11:00	4	moderate	30 min
12:00	5	moderate	30 min
13:00	6	high	25 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 Rosario

Throughout the year, UV Index levels display significant seasonal changes, with extreme risk months occurring from January to March and again in November and December, where the UV Index peaks at 14 and burn time is as short as 10 minutes. The month of March is notably severe with a UV Index of 11, still categorized as extreme, making it crucial for both visitors and residents to take protective measures. As spring transitions into summer, the UV Index decreases to moderate levels in May through July, allowing for longer safe exposure times of up to 30 minutes. However, caution is still warranted as both August and September experience a rebound with high and very high levels, respectively, necessitating vigilance during outdoor activities. To summarize, it is advisable for everyone to apply sunscreen, wear protective clothing, and seek shade during peak UV times, especially in the high-risk months of January through March and November through December.

Monthly Maximum UV Index for Rosario, Uruguay

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 Uruguay Cities

The table above highlights how UV exposure in Rosario compares to other major locations across Uruguay. 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 Uruguay. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Las Piedras UVI	14	13	11	7	5	3	4	6	8	10	13	14
Montevideo UVI	14	13	11	7	5	3	4	6	8	10	13	14
Rosario	14	13	11	7	5	4	4	6	8	10	13	14
Paysandu UVI	15	13	11	8	5	4	4	6	8	11	13	14
Salto UVI	15	13	12	8	5	4	5	6	9	11	13	14
Rivera UVI	15	14	12	9	5	4	5	7	9	12	14	15