UV Index in Sao Luis, Brazil

Last updated: May 3, 2025

In Sao Luis, Brazil, being aware of the UV Index is crucial for protecting your skin and health. Understanding UV levels helps prevent sunburn and long-term skin damage, allowing residents and visitors to enjoy the sunny climate safely. With its tropical savanna climate, Sao Luis often experiences high UV exposure, especially during mid-day when the index peaks at 13—a level that can cause harm in just minutes. By staying informed about these UV levels, you can take proactive steps to shield yourself from harmful rays and enjoy the vibrant outdoor lifestyle this beautiful city offers.

Hourly UV Index in Sao Luis

As the day unfolds, the UV Index embarks on a thrilling ascent, reaching its peak around 11:00 AM and 12:00 PM at a blazing 13, indicating the need for sun protection. Visitors basking in the sunlight at 10:00 AM encounter a sharp rise to 10, while the early morning hours remain mild, with a low of 1 at 7:00 AM. As the afternoon approaches, the intensity wanes, dropping to a refreshing 5 by 3:00 PM, and further declines as the sun begins its descent, fading to 0 by 7:00 PM. This chart serves as a reminder that while midday sun can be relentless, the early and late hours offer a gentle reprieve for outdoor enthusiasts. Enjoy the sunshine, but don’t forget your sunscreen during those peak hours!

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	10	very high	15 min
11:00	13	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	5	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 Sao Luis

The UV Index remains notably high throughout the year, with extreme exposure levels observed consistently from January to December. The months of February through March see the highest values, peaking at 16 in March, indicating a significant risk for sunburn with a burn time of just 10 minutes. While June and July slightly decrease to 12 and 11, respectively, they still maintain an extreme risk category. Visitors and residents should remain vigilant, especially during these months, and take precautionary measures such as wearing protective clothing, applying sunscreen, and seeking shade to mitigate potential sunburn and long-term skin damage. It is essential to prioritize sun safety year-round due to the persistent high UV Index in the region.

Monthly Maximum UV Index for Sao Luis, Brazil

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

The table above highlights how UV exposure in Sao Luis 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 Luis'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 Luis	14	14	16	15	13	12	11	13	13	13	13	13