UV Index in Sao Joao, Brazil

Last updated: July 2, 2025

In São João, Brazil, staying informed about the UV Index is essential for safeguarding your skin and overall health. Understanding UV levels helps you take proactive steps against sunburn and long-term skin damage, allowing you to enjoy the glorious sunshine without the risks. With a tropical climate that often showcases high UV exposure—peaking at an intense 11 during midday hours—it's crucial to plan your outdoor activities accordingly. Equip yourself with this knowledge to protect your skin while soaking up the vibrancy of São João!

Hourly UV Index in Sao Joao

As the sun rises, the UV Index climbs steadily, starting at a gentle 1 at 7:00 AM. By 8:00 AM, it reaches 3, marking the beginning of increased sun exposure. The day continues to heat up, with the index peaking at a remarkable 11 from 11:00 AM to 12:00 PM, indicating a high risk for harm from unprotected sun exposure. As the afternoon sets in, it gradually declines, dropping to 6 by 2:00 PM and subsequently to 3 by 3:00 PM. As the sun begins to descend, the index returns to a safer 1 by 4:00 PM and tapers off to 0 after 6:00 PM. This hourly trend underscores the importance of sun protection during the midday hours when the UV exposure is at its highest.

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	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	9	very high	15 min
14:00	6	high	25 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 Sao Joao

Throughout the year, the UV Index remains consistently high, with extreme exposure levels from January to November, and only slightly lowering in June and July. The highest risk months are January, March, November, and December, each reaching a UV Index of 15, where the burn time is limited to just 10 minutes. Even during the summer months, the UV Index hovers between 11 and 12, indicating a persistent threat. Visitors and residents are strongly advised to take necessary precautions, such as wearing protective clothing, applying sunscreen frequently, and seeking shade, especially during the peak hours of sunlight. Maintaining awareness of these UV changes is crucial for safe outdoor activities year-round.

Monthly Maximum UV Index for Sao Joao, Brazil

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

The table above highlights how UV exposure in Sao Joao 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.

Sao Joao'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
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13
Sao Joao	15	14	15	14	12	11	11	12	14	14	15	15