UV Index in Viana, Brazil

Last updated: July 2, 2025

In Viana, Brazil, understanding the UV Index is crucial for protecting your skin from harmful solar radiation. The UV levels here can peak dramatically, especially during midday—reaching as high as 11 between 12 PM and 1 PM. Awareness of these levels helps locals and visitors alike prevent sunburn and promote long-term skin health. Given Viana's tropical climate, where the sun shines brightly, residents should be particularly vigilant about those hours with elevated UV exposure. Make informed choices to enjoy the sun safely!

Hourly UV Index in Viana

The UV Index begins its ascent at 07:00 with a low reading of 1, gradually rising to 2 by 08:00. As the day progresses, the intensity of UV radiation peaks at 12:00, hitting a maximum of 11—a critical level where sun protection is essential. Following this zenith, the index starts to decline, measuring 10 at 13:00, then tapering off to 8 by 14:00. By mid-afternoon, the UV Index drops to 5 at 15:00 and continues its downward trajectory, reaching 2 at 16:00. As the sun sets, the UV index decreases to 1 by 17:00 and ultimately settles at 0 by 18:00, signifying the end of significant UV exposure for the day. It's a reminder that while the sun's rays can be intense at midday, the morning and late afternoon offer safer conditions for outdoor activities.

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 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	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