UV Index in Castro Alves, Brazil

Last updated: June 2, 2025

In Castro Alves, Brazil, being aware of the UV Index is crucial for safeguarding your skin and overall health. With its tropical climate and significant sun exposure, understanding UV levels helps you prevent sunburn and long-term skin damage. Knowledge of the UV Index—ranging from a moderate 3 in the morning to a peak of 9 during midday—empowers residents and visitors alike to take necessary precautions. By keeping an eye on UV levels, you can enjoy the sun while prioritizing your well-being in this beautiful region.

Hourly UV Index in Castro Alves

The UV Index throughout the day showcases a distinctive pattern, peaking dramatically as the sun ascends. From 7:00 AM to 8:00 AM, the index starts at a low 1, gradually climbing to a moderate 3. By 9:00 AM, the intensity rises to 5, but the real surge occurs between 10:00 AM and 12:00 PM, where it reaches a maximum of 9, indicating a high risk for sun exposure. As afternoon approaches, the UV Index begins to taper off, dropping to 5 by 2:00 PM, and further declining to 3 at 3:00 PM. The day winds down with 1 at 4:00 PM and dwindling to 0 by 6:00 PM. To ensure safety during peak hours, it's crucial to take precautions from 10:00 AM to 12:00 PM, when UV radiation is at its strongest.

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
09:005moderate30 min
10:008very high15 min
11:009very high15 min
12:009very high15 min
13:008very high15 min
14:005moderate30 min
15:003moderate30 min
16:001low45 min
17:001low45 min
18:000low45 min
19:000low45 min

Monthly UV Index Trends in Castro Alves

The UV Index showcases significant seasonal changes, with extreme exposure levels predominating from January to April and again from August to November. The highest-risk months include January, February, March, and April, where the UV Index consistently reaches 14 to 15, resulting in a burn time of just 10 minutes. Notably, June and July present slightly lower but still concerning levels of very high exposure with a UV Index of 9 to 10 and a burn time of 15 minutes. As visitors and residents navigate these months, it is imperative to take precautions, such as wearing sunscreen, protective clothing, and seeking shade, especially during peak sunlight hours. Prioritizing sun safety is essential year-round, but particularly so during these high UV periods.

Monthly Maximum UV Index for Castro Alves, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Castro Alves. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec15141413119101213151514
Data source: Statistical UV Index data for Castro Alves, 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 Castro Alves UV Index with Other Brazil Cities

The table above highlights how UV exposure in Castro Alves 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.
Castro Alves'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
Castro Alves15141413119101213151514
Fortaleza UVI141415151311111213131313