UV Index in Rio Branco, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Rio Branco, Brazil, where the sun's intensity can pose significant risks to skin health. Monitoring UV levels helps prevent sunburn and long-term skin damage, making it essential for outdoor activities. With a tropical rainforest climate, Rio Branco experiences high UV exposure, especially between 10:00 AM and 2:00 PM, when the UV Index peaks at an intense 12. Being aware of these levels can empower you to take protective measures, ensuring your time in the sun is safe and enjoyable.

Hourly UV Index in Rio Branco

The UV Index shows a dynamic pattern throughout the day, starting at a gentle 2 at 7:00 AM and gradually rising to a peak of 12 by 12:00 PM. This indicates a high risk of harm from unprotected sun exposure, especially during the midday hours when the sun is strongest. As the afternoon progresses, the index begins to decline, dropping to 6 by 2:00 PM and then further to 3 by 3:00 PM. By 4:00 PM, it decreases to a minimal level of 1, eventually settling at 0 by 6:00 PM and beyond. For those planning outdoor activities, it's crucial to protect your skin during those peak UV hours from 10:00 AM to 1:00 PM!

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
07:002low45 min
08:004moderate30 min
09:007high25 min
10:0010very high15 min
11:0012extreme10 min
12:0012extreme10 min
13:009very high15 min
14:006high25 min
15:003moderate30 min
16:001low45 min
17:001low45 min
18:000low45 min
19:000low45 min

Monthly UV Index Trends in Rio Branco

Throughout the year, UV Index levels exhibit significant seasonal variation, with the highest values recorded in the winter and early spring months. From January to April, the UV Index remains at an extreme level, peaking at 16, with a dangerously short burn time of just 10 minutes. The risk gradually decreases through the summer, reaching a very high level of 10 in June and July, before rising again to high extremes in August and September. Notably, the months of January through April, alongside November and December, are particularly high-risk for UV exposure. As such, residents and visitors are advised to take precautionary measures year-round, including wearing sun protection, seeking shade during peak sunlight hours, and limiting sun exposure, especially during these high-risk months.

Monthly Maximum UV Index for Rio Branco, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Rio Branco. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec151616141210101112141514
Data source: Statistical UV Index data for Rio Branco, 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 Rio Branco UV Index with Other Brazil Cities

The table above highlights how UV exposure in Rio Branco 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.
Rio Branco's solar exposure compared to other cities in Brazil. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Rio de Janeiro UVI15141310767911121315
Sao Paulo UVI16151211867911131415
Belo Horizonte UVI171614129781012131416
Salvador UVI1414141310991212151514
Fortaleza UVI141415151311111213131313
Rio Branco151616141210101112141514