UV Index in Alcantara, Brazil

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Alcantara, Brazil, where the tropical climate exposes you to varying levels of ultraviolet radiation throughout the day. Staying informed about UV levels not only helps in preventing sunburn but also plays a vital role in maintaining long-term skin health. With midday UV indices reaching a peak of 12—indicating extreme risk—it’s essential to take proper precautions to protect your skin from harmful rays. As the sun shines brightly in this picturesque coastal town, awareness of UV exposure risks can make all the difference in enjoying the outdoors safely.

Hourly UV Index in Alcantara

At dawn, the UV Index starts low at 1 around 7 AM, gradually rising to 3 by 8 AM. However, from 9 AM, it begins to climb steeply, reaching a peak of 12 at noon, indicating a time for caution and sun protection. The intensity begins to wane in the afternoon, dropping to 8 at 2 PM, and further declining to 5 by 3 PM. As the day winds down, the UV Index lowers significantly to 2 at 4 PM, then 1 at 5 PM, finally fading to 0 after 6 PM. This fluctuation illustrates a clear pattern of midday sun strength, encouraging outdoor enthusiasts to stay vigilant during 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	9	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	8	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 Alcantara

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 Alcantara, Brazil

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

The table above highlights how UV exposure in Alcantara 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.

Alcantara'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
Alcantara	14	14	16	15	13	12	11	13	13	13	13	13