UV Index in Guaira, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Guaira, Brazil, where the tropical climate often leads to high levels of sun exposure. By being aware of UV levels throughout the day, you can effectively prevent sunburn and protect your skin's health, reducing the risk of long-term damage. With peak UV Index values reaching 8 around noon, it's essential to take precautions during these hours to enjoy the beautiful Guaira sun safely, ensuring that your outdoor activities remain both enjoyable and healthy.

Hourly UV Index in Guaira

At dawn, the UV Index remains low, peaking at 1 by 08:00. As the sun rises higher, a notable increase occurs, reaching 3 at 09:00 and escalating dramatically to a maximum of 8 from 12:00 to 13:00. This midday surge indicates a higher risk for sun exposure, making it essential to take precautions such as wearing sunscreen and protective clothing. The intensity then gradually declines, dropping to 4 by 15:00, and continuing its descent to 0 by 19:00, marking the end of the sun’s peak influence for the day. Stay mindful of these hourly fluctuations to enjoy the sun safely!

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

Monthly UV Index Trends in Guaira

The UV Index experiences significant fluctuations throughout the year, with extreme levels occurring from January to April and again in September to November, making these months particularly high-risk for sun exposure. In January, February, March, and April, the UV Index peaks at 16, indicating a burn time of just 10 minutes. As the seasons transition, the UV Index lowers in June to 7 and July to 8, where the exposure remains very high. However, even during the summer months, caution is advised, particularly from May to August, where burn times vary from 15 to 25 minutes. Residents and visitors should adopt sun-safe practices, such as wearing sunscreen, protective clothing, and seeking shade, especially during these high-risk periods. Regularly monitoring the UV Index is crucial to ensure safe outdoor experiences year-round.

Monthly Maximum UV Index for Guaira, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Guaira. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec161613119781012141416
Data source: Statistical UV Index data for Guaira, 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 Guaira UV Index with Other Brazil Cities

The table above highlights how UV exposure in Guaira 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.
Guaira's solar exposure compared to other cities in Brazil. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Rio de Janeiro UVI15141310767911121315
Sao Paulo UVI16151211867911131415
Guaira161613119781012141416
Belo Horizonte UVI171614129781012131416
Salvador UVI1414141310991212151514
Fortaleza UVI141415151311111213131313