UV Index in Rio Branco, Brazil

Last updated: July 2, 2025

In Rio Branco, Brazil, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn. The city's tropical climate exposes residents and visitors to varying UV levels throughout the day, peaking at a risky UV Index of 10 around midday. Understanding these levels can empower locals to take necessary precautions against harmful ultraviolet radiation, especially when outdoor activities are most enjoyable. With UV exposure risks on the rise, being informed about the UV Index is a simple yet effective way to protect yourself and ensure a healthy, sun-safe lifestyle in this vibrant Amazonian city.

Hourly UV Index in Rio Branco

As the sun rises, the UV Index starts low at 1 at 07:00, making it a safe time for early birds. By 08:00, it climbs to 3, indicating a slight increase in UV exposure. The peak arrives sharply at 11:00 and 12:00, hitting a maximum of 10—a strong reminder to wear sunscreen and seek shade. Following this, the index gradually decreases, dipping to 6 by 14:00 and dropping further to 3 by 15:00. As the day winds down, UV levels return to a comfortable 1 by 16:00, fading to 0 by 18:00. This hourly pattern emphasizes the importance of midday protection while reminding us of the sun's dynamic presence throughout the day.

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	6	high	25 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 Rio Branco

Throughout the year, UV Index levels exhibit significant seasonal variation, with the highest values recorded in the winter and early spring months. From January to April, the UV Index remains at an extreme level, peaking at 16, with a dangerously short burn time of just 10 minutes. The risk gradually decreases through the summer, reaching a very high level of 10 in June and July, before rising again to high extremes in August and September. Notably, the months of January through April, alongside November and December, are particularly high-risk for UV exposure. As such, residents and visitors are advised to take precautionary measures year-round, including wearing sun protection, seeking shade during peak sunlight hours, and limiting sun exposure, especially during these high-risk months.

Monthly Maximum UV Index for Rio Branco, Brazil

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

The table above highlights how UV exposure in Rio Branco 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.

Rio Branco'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
Rio Branco	15	16	16	14	12	10	10	11	12	14	15	14