UV Index in Viana, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial in Viana, Brazil, where sunlight is abundant throughout the year. Awareness of UV levels plays a vital role in preventing sunburn and protecting skin health, particularly as the city experiences peak UV exposure between 10:00 AM and 2:00 PM, when values soar to a critical level of 8. With a tropical climate that enhances UV radiation risk, recognizing these levels not only helps safeguard your skin but also promotes overall well-being under the radiant sun. Stay informed and enjoy the outdoors safely!

Hourly UV Index in Viana

As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it nudges up to 2, signaling a mild increase in UV exposure. The intensity heats up quickly, reaching a moderate 4 by 9:00 AM, before hitting its peak of 8 from 11:00 AM to 12:00 PM. This is the prime time for sun safety awareness! After noon, the UV Index gradually declines; by 3:00 PM, it recedes to 3, and as the day wanes, it drops significantly to 1 by 4:00 PM. By evening, UV levels have diminished, reaching 0 by 6:00 PM, offering a reprieve from the sun’s rays.

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
07:001low45 min
08:002low45 min
09:004moderate30 min
10:006high25 min
11:008very high15 min
12:008very high15 min
13:007high25 min
14:005moderate30 min
15:003moderate30 min
16:001low45 min
17:001low45 min
18:000low45 min
19:000low45 min

Monthly UV Index Trends in Viana

The UV Index exhibits significant seasonal variations, with extreme levels prevalent from January through April and again in September through November, where the index consistently reaches values between 13-15, indicating a burn time of just 10 minutes. The months of May through August experience a slight decrease, though they still present very high levels of UV exposure, particularly in May and July. Notably, April and September are key transition months that also require caution due to their extreme UV ratings. Visitors and residents are strongly advised to take protective measures, especially during high-risk months of January, February, March, April, September, October, November, and December, by wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to minimize skin damage.

Monthly Maximum UV Index for Viana, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Viana. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec151413118781012131415
Data source: Statistical UV Index data for Viana, 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 Viana UV Index with Other Brazil Cities

The table above highlights how UV exposure in Viana compares to other major locations across Brazil. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Viana's solar exposure compared to other cities in Brazil. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Rio de Janeiro UVI15141310767911121315
Sao Paulo UVI16151211867911131415
Viana151413118781012131415
Belo Horizonte UVI171614129781012131416
Salvador UVI1414141310991212151514
Fortaleza UVI141415151311111213131313