UV Index in Portao, Brazil

Last updated: August 1, 2025

In Portao, Brazil, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding the UV levels can help you prevent sunburn and reduce the risk of long-term skin damage, especially given the region's Cfa climate, which is characterized by subtropical conditions and abundant sunlight. With UV Index values reaching up to 5 during midday hours, the potential for harmful exposure is significant. Therefore, keeping an eye on the UV Index can empower you to enjoy the outdoors safely while safeguarding your skin against the sun's powerful rays.

Hourly UV Index in Portao

At dawn, the UV Index begins at a gentle 0 by 07:00, indicating minimal exposure risk. As the sun rises higher, the index steadily climbs, reaching 1 at 08:00 and peaking at 5 between 12:00 and 13:00, when the sun’s rays are at their most intense. During these peak hours, it’s wise to don your sunscreen and protective gear. Following this zenith, the index gracefully descends, dropping to 4 at 14:00 and tapering off to 2 by 15:00. As the afternoon fades to evening, the UV levels reduce significantly, returning to a safe 0 by 18:00. This hourly UV pattern underscores the importance of sun safety during peak daylight 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	4	moderate	30 min
11:00	6	high	25 min
12:00	7	high	25 min
13:00	7	high	25 min
14:00	5	moderate	30 min
15:00	3	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 Portao

The UV Index exhibits significant seasonal variation, with January, February, March, October, November, and December classified as high-risk months, all featuring an extreme exposure category and a quick burn time of just 10 minutes. Similarly, April and September fall into the very high category with burn times of 15 minutes. In contrast, May and August have a high exposure category with longer burn times of 25 minutes, while June and July offer a moderate risk, allowing for 30 minutes before burning. Residents and visitors should take serious precautions during the extreme months by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen frequently to minimize the risk of skin damage.

Monthly Maximum UV Index for Portao, Brazil

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

The table above highlights how UV exposure in Portao 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.

Portao'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
Portao	14	13	12	10	6	5	5	7	9	12	13	14
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