UV Index in Guaratuba, Brazil

Last updated: May 3, 2025

In Guaratuba, Brazil, understanding the UV Index is crucial for protecting your skin and overall health. With intense sun exposure typical in this Cfa climate, even a short time outdoors can lead to sunburn and increase the risk of skin issues. During peak hours, particularly around noon when the UV Index reaches its maximum of 7, awareness of UV levels is vital for safe sun practices. By tracking the UV Index, residents and visitors can take proactive measures to enjoy the beautiful beaches of Guaratuba while safeguarding their skin from harmful UV rays.

Hourly UV Index in Guaratuba

At dawn, the UV Index starts off low, with a maximum of 1 at 07:00 and 08:00. As the sun rises higher, it reaches 3 by 09:00, before climbing to a peak of 7 at 12:00. This midday intensity signifies a need for sun protection, especially during the height of the day when UV exposure is most potent. The index begins to decline in the afternoon, dropping to 5 at 14:00 and settling back to 1 by 17:00. By 18:00 and into the evening, the UV Index sharply drops to 0, marking a safe time to enjoy outdoor activities without the risk of sunburn. Stay sun-safe!

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	6	high	25 min
12:00	7	high	25 min
13:00	6	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 Guaratuba

The seasonal UV changes indicate that January to March experiences extremely high UV Index levels, with values peaking at 15 in January and February, necessitating a burn time of just 10 minutes. As spring approaches, the UV Index begins to moderate, reaching 7 in May and 6 in June and July, where the burn time extends to 25 minutes. However, UV levels rise again in late summer and fall, particularly in August and September, both classified as very high, with a significant decrease in burn time to 15 minutes. The high-risk months are therefore noted as January through March and October through November, where extreme levels demand heightened caution. Visitors and residents should be advised to prioritize sun safety practices throughout these months, utilizing broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak sun hours to minimize the risk of UV exposure.

Monthly Maximum UV Index for Guaratuba, Brazil

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

The table above highlights how UV exposure in Guaratuba 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.

Guaratuba'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
Guaratuba	15	14	12	10	7	6	6	8	10	13	14	14
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