UV Index in Pirai do Sul, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Pirai do Sul, Brazil, where the Cfb climate offers mild summers yet presents significant ultraviolet exposure, particularly during peak hours. Awareness of UV levels is essential for preventing sunburn and protecting skin health, as the index escalates to a maximum of 8 around midday, indicating a high risk of harm from unprotected sun exposure. With typical UV exposure risks peaking from 10 AM to 2 PM, staying informed can help you enjoy the sunny days safely while taking proactive measures to safeguard your skin and overall wellbeing.

Hourly UV Index in Pirai do Sul

At sunrise, the UV Index begins at a gentle 1 at 07:00, rising gradually as the sun climbs higher. By 09:00, it reaches 3, indicating a moderate level of UV radiation. The heat of the day peaks at 12:00 with a high of 8, suggesting it’s time to seek shade or apply sunscreen. As the afternoon progresses, the index slightly drops to 7 at 13:00 and continues to decline, settling at 3 by 15:00. As the sun starts to set, the risk diminishing to 1 at 17:00 and finally dropping to 0 by 18:00, signaling a safer time for outdoor activities as the day winds down. Be mindful of the midday sun to protect your skin!

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	5	moderate	30 min
11:00	7	high	25 min
12:00	8	very high	15 min
13:00	7	high	25 min
14:00	6	high	25 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 Pirai do Sul

Throughout the year, UV index levels fluctuate significantly, with extreme exposure categories dominating from January to April and again in September to November. The months of January, February, March, April, September, October, and November each exhibit a UV index of 13 or higher, marking them as high-risk months where sunburn can occur in 10 minutes or less. From May to August, the UV index decreases slightly, reaching its lowest point of 6 in June and July, though these months still warrant caution, especially in May and August with very high levels, indicating a 15-minute burn time. It is crucial for both visitors and residents to take protective measures, such as wearing sunscreen and protective clothing, particularly during the spring and fall months, to minimize the risk of skin damage.

Monthly Maximum UV Index for Pirai do Sul, Brazil

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

The table above highlights how UV exposure in Pirai do Sul 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 do Sul'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
Pirai do Sul	16	16	13	11	8	6	7	9	12	14	15	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