UV Index in Rio de Janeiro, Brazil

Last updated: June 2, 2025

Understanding the UV Index is essential for residents and visitors in Rio de Janeiro, Brazil, a city known for its vibrant culture and stunning beaches. By being aware of daily UV levels, you can take proactive measures to prevent sunburn and protect your long-term skin health. With Rio's tropical climate, the UV exposure can be particularly high, especially during midday when indices frequently hit 6, indicating a moderate to high risk of harm from unprotected sun exposure. Embrace the sun responsibly and enjoy the beautiful outdoors, knowing you've taken the necessary steps to stay safe!

Hourly UV Index in Rio de Janeiro

The UV Index starts low in the early morning, with a maximum of 1 at 07:00 and 08:00, making it a safe time for outdoor activities. As the day progresses, the intensity rises sharply, peaking at 6 between 11:00 and 12:00—the perfect time to take precautions if heading outside. By 13:00, it dips slightly to 5, and a more noticeable decline occurs in the afternoon, falling to 2 by 15:00. As the sun sets, the UV Index drops off sharply, reaching 1 by 16:00, and finally 0 past 18:00. It’s clear that midday sun calls for some sun safety measures, but the later hours provide a much more forgiving environment for enjoying the outdoors!

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

Monthly UV Index Trends in Rio de Janeiro

Throughout the year, UV Index values experience significant fluctuations, with January, February, March, September, October, November, and December categorized as high-risk months due to their extreme exposure levels (UV Index 13-15) and a rapid burn time of 10 minutes. In contrast, April and August will see very high readings (UV Index 10 and 9, respectively) with a burn time of 15 minutes, while May, June, and July present a high exposure risk (UV Index 6-7) but with extended burn times of 25 minutes. To protect themselves, visitors and residents should strictly limit sun exposure during these high-risk months, seek shade whenever possible, and apply broad-spectrum sunscreen regularly, especially during peak sun hours.

Monthly Maximum UV Index for Rio de Janeiro, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Rio de Janeiro. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec15141310767911121315
Data source: Statistical UV Index data for Rio de Janeiro, 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 de Janeiro UV Index with Other Brazil Cities

The table above highlights how UV exposure in Rio de Janeiro 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 de Janeiro's solar exposure compared to other cities in Brazil. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Rio de Janeiro15141310767911121315
Sao Paulo UVI16151211867911131415
Belo Horizonte UVI171614129781012131416
Salvador UVI1414141310991212151514
Fortaleza UVI141415151311111213131313