UV Index in Rio Casca, Brazil

Last updated: July 2, 2025

Understanding the UV Index is essential for the residents and visitors of Rio Casca, Brazil, where the sun’s rays can be intense. Awareness of UV levels plays a crucial role in preventing sunburn, protecting skin health, and reducing the risk of long-term damage. With a tropical climate characterized by high UV exposure, especially during midday when levels peak at 8, it becomes vital to take precautions. Whether you're enjoying the outdoors or simply going about your day, staying informed about the UV Index can help you enjoy the sun safely and responsibly.

Hourly UV Index in Rio Casca

As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it nudges up to 2, signaling a mild increase in UV exposure. The intensity heats up quickly, reaching a moderate 4 by 9:00 AM, before hitting its peak of 8 from 11:00 AM to 12:00 PM. This is the prime time for sun safety awareness! After noon, the UV Index gradually declines; by 3:00 PM, it recedes to 3, and as the day wanes, it drops significantly to 1 by 4:00 PM. By evening, UV levels have diminished, reaching 0 by 6:00 PM, offering a reprieve from the sun’s rays.

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	4	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	8	very high	15 min
13:00	7	high	25 min
14:00	5	moderate	30 min
15:00	3	moderate	30 min
16:00	1	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 Rio Casca

Throughout the year, the UV Index demonstrates significant seasonal variations, with January through April consistently classified under the extreme exposure category, peaking at 16 in January and December. The high-risk months include January, February, March, April, September, October, November, and December, where a rapid onset of sunburn can occur in as little as 10 minutes. In contrast, May through August display slightly lower indices, ranging from 7 to 10, classified as high to very high, with burn times increasing to 15 to 25 minutes. To ensure safety, both visitors and residents are advised to take proper precautions during these high-risk months, such as wearing protective clothing, applying broad-spectrum sunscreen, and limiting sun exposure during peak hours.

Monthly Maximum UV Index for Rio Casca, Brazil

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

The table above highlights how UV exposure in Rio Casca 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.

Rio Casca'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
Rio Casca	16	15	14	12	9	7	8	10	12	13	14	16
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