UV Index in Porto Velho, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Porto Velho, Brazil, where the tropical climate often brings intense sunlight. Being aware of the UV levels can significantly aid in preventing sunburn, protecting your skin from harmful effects, and promoting overall skin health. With peaks reaching a staggering 10 between 12:00 PM and 1:00 PM, the potential for overexposure is quite high. In Porto Velho, where the weather is predominantly sunny, taking proactive measures based on the UV Index is essential for enjoying the outdoors safely and keeping your skin in top condition.

Hourly UV Index in Porto Velho

The UV Index chart reveals a dynamic shift throughout the day, beginning with a low of 1 at 07:00, gradually rising to a moderate 3 by 09:00. As the sun climbs higher, the index peaks at an impressive 10 between 12:00 and 13:00, marking the most dangerous hours for sun exposure. Following this zenith, it declines to 8 at 14:00 before tapering off to 2 by 16:00, and finally settling back to a safer 1 by 17:00. To protect your skin, make sure to stay vigilant and seek shade during those high-UV 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	2	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Porto Velho

Throughout the year, UV Index levels exhibit significant seasonal variation, with January through April consistently showing extreme UV levels (index 15-16) and a burn time of just 10 minutes. This trend continues into November, which also has an extreme index of 15. May sees a slight drop to 12, transitioning to a very high index of 10 during June and July, with a slightly extended burn time of 15 minutes. August witnesses a return to extreme levels (index 11), while September and October remain high at 12 and 14, respectively. As a result, the high-risk months for sun exposure are from January to April and October to November, warranting extra caution. Visitors and residents should take precautions during these months—such as applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade—to minimize the risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for Porto Velho, Brazil

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

The table above highlights how UV exposure in Porto Velho 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.

Porto Velho'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
Porto Velho	15	15	16	15	12	10	10	11	12	14	15	14