UV Index in San Luis, Argentina

Last updated: July 2, 2025

Understanding the UV Index is essential for residents and visitors of San Luis, Argentina, as it plays a crucial role in safeguarding your skin health and preventing sunburn. With the region’s BSk climate characterized by its dry conditions and heightened solar exposure, being aware of UV levels helps you take proactive measures against harmful effects of the sun. During peak hours, the UV Index can rise to 4, indicating moderate risk, making it vital to adopt protective strategies such as wearing sunscreen and protective clothing. By staying informed about the UV Index, you can enjoy the sunshine safely and maintain healthy skin throughout your time in San Luis.

Hourly UV Index in San Luis

The UV Index for the day reveals a gradual rise in sun intensity, starting from a low 0 at 07:00 and 08:00. As the sun climbs higher, it reaches a moderate 1 by 09:00 and 10:00. By 11:00, the index escalates to 2, signaling the need for some sun protection. The peak intensity occurs between 12:00 and 14:00, where the UV Index hits 4, suggesting it's the best time for outdoor precautions. A slight decline follows, tracing down to 3 at 15:00 and descending further to 2 by 16:00. As the day winds down, conditions become gentler, with values returning to 1 at 17:00 and 18:00, ultimately falling back to 0 by 19:00. Stay mindful of the sun’s strength during the 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.
TimeUVICategoryTime to Burn
07:000low45 min
08:000low45 min
09:001low45 min
10:001low45 min
11:002low45 min
12:004moderate30 min
13:004moderate30 min
14:004moderate30 min
15:003moderate30 min
16:002low45 min
17:001low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in San Luis

Throughout the year, UV Index values fluctuate significantly, with extreme risk levels occurring mainly in January, February, March, October, November, and December—all of which have a UV Index of 15 or higher and a burn time of just 10 minutes. From April to August, the UV Index dips to very high and moderate categories, reaching a peak in April at 8 and returning to 6 in August. Visitors and residents are strongly advised to take precautions during the high-risk months of January, February, March, October, and November by wearing protective clothing, using broad-spectrum sunscreen, and limiting sun exposure, particularly during midday hours.

Monthly Maximum UV Index for San Luis, Argentina

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in San Luis. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec151311854469111415
Data source: Statistical UV Index data for San Luis, 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 San Luis UV Index with Other Argentina Cities

The table above highlights how UV exposure in San Luis 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.
San Luis's solar exposure compared to other cities in Argentina. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Buenos Aires UVI141311754468101314
Rosario UVI141311854468111314
San Luis151311854468111415
Mendoza UVI151412864569121415
Cordoba UVI151312964579121415
San Miguel de Tucuman UVI15141310756710131515