UV Index in Altos, Brazil

Last updated: July 2, 2025

In Altos, Brazil, staying informed about the UV Index is crucial for protecting your skin and maintaining good health. Understanding UV levels helps you take proactive measures against sunburn and long-term skin damage. Given Altos's tropical climate, residents and visitors face heightened UV exposure, especially during peak hours when the index can soar to a dangerous 11—making it essential to be vigilant about sun safety. By monitoring the UV Index, you can better enjoy the beautiful sunny days while safeguarding your skin.

Hourly UV Index in Altos

The UV Index rises sharply throughout the morning, starting from a modest 1 at 07:00 and making a steady climb to reach its peak of 11 at both 11:00 and 12:00. During this prime time, sun protection is essential to safeguard against harmful rays. As the afternoon progresses, the index begins to decline, dropping to 10 at 13:00 and then tapering off to 4 by 15:00. By late afternoon, the UV Index diminishes significantly, falling to 1 by 17:00 and ultimately reaching 0 at 18:00 and 19:00. This trend emphasizes the importance of planning outdoor activities for early morning or late afternoon 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.
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	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	4	moderate	30 min
16:00	2	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 Altos

The UV Index experiences minimal variation throughout the year, consistently remaining in the extreme exposure category, with values ranging from 11 to 16. This indicates that every month presents a high risk for sunburn, requiring careful sun protection. Notably, the months of March and April peak with the highest UV Index of 16 and 15, respectively, marking them as critical for sun safety. Given that daily burn time is as brief as 10 minutes throughout the year, it is essential for both residents and visitors to take precautions, such as wearing sunscreen, protective clothing, and seeking shade, especially during midday hours. Ensuring consistent sun safety practices is vital to minimize the risk of UV-related health issues.

Monthly Maximum UV Index for Altos, Brazil

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Altos. 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 Altos, 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 Altos UV Index with Other Brazil Cities

The table above highlights how UV exposure in Altos 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.

Altos'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
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13
Altos	14	14	16	15	13	11	11	13	13	13	14	14