UV Index in Castro Alves, Brazil

Last updated: July 2, 2025

In Castro Alves, Brazil, understanding the UV Index is crucial for protecting your skin and overall health. With sunny weather characterized by an Af climate, the UV levels can soar, particularly between 10 AM and 2 PM, when the index peaks at 10—indicating very high risk for sunburn and potential long-term skin damage. Being aware of these levels allows residents and visitors alike to take proactive steps in sun safety, ensuring a balance between enjoying the outdoor beauty of Castro Alves and keeping your skin healthy. Stay informed and protect yourself!

Hourly UV Index in Castro Alves

The UV Index throughout the day showcases a notable peak from 11:00 AM to 12:00 PM, where it reaches a high of 10, indicating very high levels of UV radiation and a strong need for sun protection. This intense sunlight starts to build up at 9:00 AM with a reading of 5, escalating to 8 by 10:00 AM. As the afternoon unfolds, the index gradually declines, dropping to 6 at 2:00 PM, followed by a significant decrease back to 3 by 3:00 PM. By the evening, the UV levels return to safe numbers, tapering off to 1 at 4:00 PM and 0 by 6:00 PM, prompting a welcome end to the day’s sun exposure. Always remember to take precautions during those 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.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	10	very high	15 min
13:00	8	very high	15 min
14:00	6	high	25 min
15:00	3	moderate	30 min
16:00	1	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 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.

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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rio de Janeiro UVI	15	14	13	10	7	6	7	9	11	12	13	15
Sao Paulo UVI	16	15	12	11	8	6	7	9	11	13	14	15
Belo Horizonte UVI	17	16	14	12	9	7	8	10	12	13	14	16
Salvador UVI	14	14	14	13	10	9	9	12	12	15	15	14
Castro Alves	15	14	14	13	11	9	10	12	13	15	15	14
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13