UV Index in Boa Vista, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Boa Vista, Brazil, where the tropical climate brings ample sunshine and significant UV exposure risks. The UV Index serves as a valuable tool in helping individuals protect their skin by gauging the potential for sunburn and long-term skin health damage. With peak UV levels reaching 12 around midday, awareness is key for enjoying outdoor activities safely. In this vibrant city, where the sun shines brightly throughout the year, being informed about UV levels can empower you to take proactive measures against harmful rays and ensure a safe and enjoyable experience under the sun.

Hourly UV Index in Boa Vista

The UV Index throughout the day showcases a dramatic rise in intensity, peaking at 12 between noon and 1 PM, signaling a high level of risk for unprotected skin. Early morning starts off with a gentle 1 at 7 AM, gradually climbing to 3 by 8 AM. As the sun approaches its zenith, the index escalates to 9 by 10 AM and hits that critical mark of 11 at 11 AM. After reaching the zenith, the UV levels begin to recede, falling back to 9 by 2 PM and tapering off to 3 at 4 PM. By 6 PM, it drops to 1, and finally, the day concludes with a 0 by 7 PM, marking a complete retreat of UV intensity. It’s essential to stay protected, especially 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	9	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Boa Vista

The UV Index demonstrates consistently extreme levels throughout the year, peaking in March at 16 and experiencing only slight decreases in the following months, ranging from 12 to 16. The highest-risk months for sun exposure include February through April, where the index sits at 15 to 16, indicating that sunburn can occur in just 10 minutes of exposure. Visitors and residents should take precautionary measures year-round, such as applying sunscreen regularly, wearing protective clothing, and seeking shade during peak sun hours to prevent harmful effects from UV rays.

Monthly Maximum UV Index for Boa Vista, Brazil

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

The table above highlights how UV exposure in Boa Vista 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.

Boa Vista'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
Boa Vista	14	15	16	16	14	13	12	13	13	13	13	13