UV Index in Oeiras, Brazil

Last updated: May 3, 2025

Understanding the UV Index in Oeiras, Brazil, is crucial for promoting sun safety and protecting skin health in this tropical climate. With UV levels spiking to a maximum of 12 during the midday hours, awareness becomes vital to prevent sunburn and long-term skin damage. As Oeiras experiences intense sun exposure, particularly from 10 AM to 2 PM, knowing the UV Index allows you to take necessary precautions and enjoy the sunny days while safeguarding your skin against harmful rays. Stay informed, stay protected!

Hourly UV Index in Oeiras

At sunrise, the UV Index starts at a mild 1 at 7:00 AM, offering a gentle welcome to the day. As the sun climbs higher, the intensity increases, reaching a moderate 3 by 8:00 AM. By 9:00 AM, it escalates to a strong 6, signaling the need for sun protection. The peak arrives at 11:00 AM and 12:00 PM, where the UV Index hits a staggering 12, indicating extreme levels of UV radiation. As the afternoon progresses, the intensity gradually declines, dropping to 8 at 2:00 PM and continuing to diminish through the late afternoon—4 at 3:00 PM, 2 at 4:00 PM, and finally returning to a safe 1 by 5:00 PM. The day winds down with no UV concern after 6:00 PM as the index falls to 0, allowing for a worry-free evening under the twilight sky.

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
12:0012extreme10 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 Oeiras

The UV Index throughout the year displays extreme levels, particularly from January through November, with values consistently between 12 and 15, indicating a high risk of harm from unprotected sun exposure. Notably, the highest UV Index occurs in March at 15, closely followed by February and April at 14. Visitors and residents should take special care during these high-risk months and consistently throughout the year, ensuring they wear appropriate sun protection, including sunscreen, hats, and UV-protective clothing. With a burn time of only 10 minutes, it is crucial to limit sun exposure, especially during midday when UV radiation is at its peak.

Monthly Maximum UV Index for Oeiras, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Oeiras. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec141415141211111213131414
Data source: Statistical UV Index data for Oeiras, 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 Oeiras UV Index with Other Brazil Cities

The table above highlights how UV exposure in Oeiras 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.
Oeiras'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
Oeiras141415141211111213131414