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UV Index in Uniao, Brazil

Last updated: May 3, 2025

In União, Brazil, staying informed about the UV Index is essential for maintaining skin health and preventing sunburn, particularly during the peak hours of midday sun. As the climate here falls under the Aw category, residents and visitors alike experience intense UV radiation, with levels reaching a maximum of 13 around noon. Understanding these fluctuations is crucial, as higher UV levels can significantly increase the risk of skin damage. By keeping an eye on the UV Index, you can enjoy the beautiful outdoor environment of União while taking necessary precautions to protect yourself from harmful exposure.

Hourly UV Index in Uniao

The UV Index throughout the day showcases a dramatic rise and fall, peaking at 12 around 12:00 PM. The morning starts gently, with a maximum of 3 at 08:00 AM, but by 10:00 AM, it escalates to 10, indicating a significant increase in sun intensity. This reaches its zenith at 12:00 PM, where a UV Index of 13 emphasizes the need for sun protection. The intensity begins to taper off after this peak, dropping to 4 by 15:00 PM and further declining to 1 by 17:00 PM. As the evening approaches, the UV Index effectively returns to 0 after 18:00 PM, signaling the end of sun exposure risk for the day. Be mindful of these fluctuations and prioritize sun safety during 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
07:001low45 min
08:003moderate30 min
09:006high25 min
10:0010very high15 min
11:0012extreme10 min
12:0013extreme10 min
13:0011extreme10 min
14:008very high15 min
15:004moderate30 min
16:002low45 min
17:001low45 min
18:000low45 min
19:000low45 min

Monthly UV Index Trends in Uniao

The UV Index shows an extreme risk of harm from unprotected sun exposure throughout the year, with very high levels observed from January to March, peaking at 16 in March. This indicates that the sun’s rays can cause skin burn in as little as 10 minutes. April maintains a high UV Index of 15, and while there is a slight decrease in June and July (both at 11), the exposure risk remains severe. August and September return to a UV Index of 13, continuing the call for diligent sun protection. As October progresses to 12 and into the late autumn months, visitors and residents should still remain vigilant, especially since November and December retain a UV Index of 13. To minimize risk, it is essential for everyone to apply sunscreen, wear protective clothing, and seek shade during peak sun hours throughout all seasons.

Monthly Maximum UV Index for Uniao, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Uniao. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec141416141311111313121313
Data source: Statistical UV Index data for Uniao, 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 Uniao UV Index with Other Brazil Cities

The table above highlights how UV exposure in Uniao 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.
Uniao'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
Uniao141416151311111313121313