UV Index in Piraju, Brazil

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Piraju, Brazil, where the climate can significantly influence sun exposure. With its Cfa climate, characterized by warm summers and mild winters, awareness of UV levels becomes essential for preventing sunburn and maintaining skin health. On clear days, UV levels can peak at 6 during midday, indicating a heightened risk for skin damage. By keeping an eye on the UV Index, you can better protect yourself and enjoy the beautiful Brazilian sun safely.

Hourly UV Index in Piraju

The UV Index for the day shows a notable increase in solar intensity as the morning unfolds. Starting at a mild 1 between 07:00 and 09:00, the index rises sharply, peaking at 6 from 11:00 to 13:00. This is a clear indication that midday sun demands caution, with later hours dropping to 5 at 14:00 and gradually decreasing toward evening. By 18:00 and 19:00, the UV Index dips to 0, signaling a safe time to be outdoors without sun protection. Overall, this day encourages sun safety practices during those peak hours when the UV rays are most potent.

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	2	low	45 min
10:00	4	moderate	30 min
11:00	6	high	25 min
12:00	6	high	25 min
13:00	6	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 Piraju

The UV Index varies significantly throughout the year, with extreme levels marking the high-risk months of January through April and returning in September to November. During these months, protective measures are crucial, as the burn time is as low as 10 minutes. The UV Index peaks in February and December at 15 and 16, respectively, while it remains at 11 in April. As spring transitions to summer, the Index decreases slightly, with May to July showing very high to high levels and longer burn times of 15 to 25 minutes. Moving into late summer, the Index sees a rise again in August (9) and September (12), emphasizing the need for sustained sun protection. Residents and visitors are advised to stay informed, use sunscreen, wear protective clothing, and seek shade during peak sun hours, especially in the extreme UV months.

Monthly Maximum UV Index for Piraju, Brazil

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

The table above highlights how UV exposure in Piraju 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.

Piraju'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
Piraju	15	15	13	11	8	6	7	9	12	14	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