UV Index in Viana, Brazil

Last updated: May 3, 2025

In Viana, Brazil, staying informed about the UV Index is crucial for safeguarding your skin health and preventing sunburn. Understanding UV levels can help locals and visitors alike make informed decisions about sun exposure, especially during peak hours when the risk of harmful effects is greatest. With a tropical climate characterized by high UV radiation, especially from late morning to early afternoon, it's essential to monitor these levels to enjoy outdoor activities safely while protecting your skin. Be aware of Viana’s UV Index, where values can soar to a striking 13, indicating a need for proactive sun safety measures.

Hourly UV Index in Viana

The UV Index reveals a striking pattern throughout the day, peaking dramatically around noon. Starting from a gentle 1 at 07:00, the index climbs steadily, hitting 3 by 08:00 before surging to 10 at 10:00 and reaching its maximum of 13 at 12:00. This midday high suggests the need for strong sun protection as the intensity begins to wane in the afternoon, dropping to 9 at 14:00 and further declining to a moderate 5 by 15:00. As the sun sets, the UV Index drops sharply to 2 at 16:00 and returns to its morning levels with a 1 at 17:00 and 0 from 18:00 onward. For sun-enthusiasts and safety-conscious individuals alike, the data paints a clear picture: the hours around midday demand the utmost vigilance against UV exposure!

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	10	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	5	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 Viana

Throughout the year, UV Index levels remain extremely high, with values consistently between 11 and 16 from January to March, marking these months as high-risk for sun exposure. March, with a peak UV Index of 16, is particularly concerning, while the levels drop slightly through the summer, tapering to 12 in October. Notably, despite some minor fluctuations, the UV Index remains in the extreme exposure category throughout the entire year, with a constant burn time of just 10 minutes. Residents and visitors are strongly advised to take protective measures, such as wearing sunscreen, protective clothing, and sunglasses, especially during the high-risk months, to mitigate the dangers of prolonged sun exposure.

Monthly Maximum UV Index for Viana, Brazil

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

The table above highlights how UV exposure in Viana 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.

Viana'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
Viana	15	14	16	15	13	12	11	13	13	12	13	13