UV Index in Tonantins, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Tonantins, Brazil, where the sun shines brightly, especially during midday hours. With maximum UV levels peaking at an intense 11 around noon, being aware of these levels is vital for preventing sunburn and promoting long-term skin health. The tropical climate in Tonantins brings unique exposure risks, making it essential to evaluate UV conditions daily to protect yourself and enjoy outdoor activities safely. Stay informed and take the necessary precautions to enjoy the sun while safeguarding your skin!

Hourly UV Index in Tonantins

The UV Index reveals a dynamic pattern throughout the day, starting at a low 1 in the early morning hours of 07:00 and 08:00. As the sun rises, the index climbs steadily, reaching 3 by 09:00. The midday sun peaks aggressively at 11, with the UV Index hitting its maximum of 11 from 12:00 to 13:00, signaling a high risk for skin damage without protection. Following this peak, values gradually decline, dropping to 9 at 14:00, and tapering down to 6 by 15:00. As the evening approaches, the UV Index falls back to 3 by 16:00 and finally descends to a 1 by 17:00 and 18:00, before sinking to 0 at 19:00, marking the end of the day's UV exposure. It's a reminder to stay vigilant under the sun, 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	1	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	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 Tonantins

Throughout the year, the UV Index remains notably high in this region, consistently categorized as extreme from January to November, with even December maintaining a significant level of UV exposure. The highest risk months are January, February, March, and April, each recording a UV Index of 16 and a critical burn time of just 10 minutes. While the index slightly decreases in the summer months of June, July, and August, it still ranges from 11 to 12, indicating substantial UV risk. As such, it is vital for both visitors and residents to take precautionary measures year-round, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sun hours to minimize the danger of UV exposure.

Monthly Maximum UV Index for Tonantins, Brazil

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

The table above highlights how UV exposure in Tonantins 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.

Tonantins'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
Tonantins	15	16	16	16	13	12	11	12	13	14	13	14