UV Index in Riachao, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for the residents of Riachao, Brazil, where the intense sun exposure typical of the Aw climate can pose significant risks to skin health. With peak UV levels reaching an alarming 13 around noon, awareness of these levels is essential for sunburn prevention and long-term skin protection. By familiarizing yourself with the UV Index, you can take proactive measures to safeguard your skin against harmful ultraviolet rays, ensuring a healthier experience under the tropical sun. Whether you’re enjoying outdoor activities or simply soaking in the beauty of Riachao, knowing the UV levels allows you to make informed decisions for your well-being.

Hourly UV Index in Riachao

The UV Index begins its climb at 7:00 AM with a moderate level of 1, but things heat up quickly. By 10:00 AM, it skyrockets to a striking 9, peaking at 12:00 PM with a blistering 13. The midday sun brings potent rays, making 11:00 AM the moment to seek shade, as the index hits 12. As the afternoon progresses, we see a gradual decline; by 2:00 PM, the index drops to 8 and continues to descend, reaching 0 by 7:00 PM. To enjoy the outdoors safely, it’s crucial to stay protected during peak hours between 10:00 AM and 2:00 PM.

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	12	extreme	10 min
12:00	13	extreme	10 min
13:00	11	extreme	10 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 Riachao

The UV Index remains consistently high throughout the year, with extreme exposure levels in every month. January through April peak at an index of 15, while June and July measure slightly lower at 11. Notably, August and September also experience a high index of 13. Consequently, high-risk months span from January to April and again in late summer and early fall, making it essential for visitors and residents to take precautions against potential sunburn—especially since the burn time is just 10 minutes across all months. It is advisable to wear protective clothing, apply broad-spectrum sunscreen, and limit outdoor activities during peak sun hours to ensure safe exposure to UV radiation.

Monthly Maximum UV Index for Riachao, Brazil

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

The table above highlights how UV exposure in Riachao 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.

Riachao'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
Riachao	15	15	15	14	13	11	11	13	13	14	14	14