UV Index in Barra Mansa, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Barra Mansa, Brazil, where sunlight can be both a blessing and a risk. With UV levels peaking during the midday hours, being aware of these indices is essential for preventing sunburn and promoting long-term skin health. The Cfa climate of Barra Mansa, characterized by warm summers and mild winters, poses unique challenges as UV radiation can reach significant levels—often hitting a high of 8 around noon. Staying informed about the UV Index allows you to enjoy the sun safely while protecting your skin from its harmful effects.

Hourly UV Index in Barra Mansa

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 Barra Mansa

The UV Index demonstrates notable seasonal fluctuations, indicating that January through April poses a high-risk period for sun exposure, with an extreme rating of 16-13, and a very short burn time of just 10 minutes. Visitors and residents should be particularly cautious during these months, as well as in September to November, which also show extreme UV levels with a burn time of 10 minutes. In contrast, May through August presents a very high risk with slightly longer burn times of 15-25 minutes, peaking in July. As such, regardless of the season, it is crucial to apply sunscreen diligently, wear protective clothing, and limit sun exposure, especially during midday hours, to safeguard against skin damage and other UV-related health issues.

Monthly Maximum UV Index for Barra Mansa, Brazil

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

The table above highlights how UV exposure in Barra Mansa 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.

Barra Mansa'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
Barra Mansa	16	16	13	11	8	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