UV Index in Porteirinha, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Porteirinha, Brazil, where the warm Aw climate can lead to high ultraviolet exposure. Recognizing UV levels not only helps in preventing sunburn but also plays a significant role in maintaining long-term skin health. With peak UV Index values reaching 10 during midday, it's essential to stay informed about potential risks to safeguard your skin while enjoying the sunny days in this vibrant region.

Hourly UV Index in Porteirinha

As the sun rises, the UV Index begins its climb, starting at a modest 1 at 07:00. By 08:00, it gently increases to 2, signaling a day of strengthening rays. The intensity peaks around 12:00 with a striking 10, indicating the time for caution and sun protection. As midday passes, the index gradually declines, dropping to 6 at 14:00 before continuing its descent to 4 at 15:00. By 17:00, it returns to a safer 1, and eventually fades to 0 after 18:00, marking a gentle close to the day. This data underscores the importance of seeking shade and wearing sunscreen during the midday hours when the UV exposure is at its most intense.

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	7	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	9	very high	15 min
14:00	6	high	25 min
15:00	4	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 Porteirinha

The UV Index exhibits significant seasonal variations, with the highest readings occurring during the winter and late fall months. **From January to April, the UV Index remains consistently extreme, peaking at 16 in December and dropping slightly to 13 in April. The risk is particularly acute in February (UV Index 15) and November (UV Index 15), necessitating vigilant sun protection. As summer arrives, the index slightly declines, with June and July recording a very high index of 9 and 10, respectively, allowing for a longer burn time of 15 minutes. However, as fall sets in, August and September return to extreme levels (12), before transitioning back to winter’s extremes. Visitors and residents should take precautions during high-risk months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially during peak sun hours. Given the consistently high UV levels year-round, staying aware and prepared is essential for skin safety.

Monthly Maximum UV Index for Porteirinha, Brazil

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

The table above highlights how UV exposure in Porteirinha 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.

Porteirinha'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
Porteirinha	15	15	14	13	11	9	10	12	12	14	15	16
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13