UV Index in Pirai, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Pirai, Brazil, where tropical weather can lead to increased exposure to harmful ultraviolet rays. Monitoring UV levels is essential not only for preventing sunburn but also for safeguarding your long-term skin health. With a climate characterized by high humidity and warm temperatures, Pirai experiences notable UV exposure, especially during midday hours when the index peaks at 8 around noon. Being informed about UV levels can empower you to take necessary precautions, ensuring you enjoy the sun safely while minimizing risks associated with excessive ultraviolet radiation.

Hourly UV Index in Pirai

As the sun rises, the UV Index begins its gradual ascent, peaking sharply at 12:00 PM with a striking 8—a reminder of the midday sun's intensity. Starting the day at a gentle 1 at 07:00, it climbs steadily to reach 6 by 10:00 AM, encouraging outdoor enthusiasts to stay protected. The climax arrives at 11:00 AM with a 7, followed closely by the height of 8 at noon. As the afternoon progresses, the UV level gracefully declines, dipping to 5 by 2:00 PM, then significantly dropping to 3, 1, and finally 0 after 6:00 PM. This data underscores the importance of sun safety during peak hours, particularly between 11:00 AM and 1:00 PM, when the UV risk is at its highest—so ensure you’re well-shielded during these critical times!

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	7	high	25 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 Pirai

Throughout the year, the UV Index exhibits significant seasonal changes, with particularly high levels between January and April where the index reaches 15-12 and the exposure category is classified as extreme. The months of September to November also present high-risk conditions, with indices of 11-13 and extreme burn times of only 10 minutes. In the summer months of May to August, the UV index falls slightly but remains in the very high to high categories, increasing burn times to 15-25 minutes. Visitors and residents should exercise caution, particularly during these high-risk months, by seeking shade, applying broad-spectrum sunscreen, and wearing protective clothing to mitigate the effects of UV radiation.

Monthly Maximum UV Index for Pirai, Brazil

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

The table above highlights how UV exposure in Pirai 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.

Pirai'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
Pirai	15	15	12	11	8	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