UV Index in Catu, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for the residents of Catu, Brazil, where the warm, tropical climate brings about significant sun exposure. With UV levels often reaching a peak of 11 during midday, awareness of these levels is vital for preventing sunburn and maintaining long-term skin health. By monitoring the UV Index, you can take proactive measures to protect yourself and your loved ones from harmful radiation during the day. In Catu, where the sun shines brightly in an Af climate, understanding UV risks ensures you enjoy the outdoors safely while minimizing the potential for skin damage.

Hourly UV Index in Catu

The UV Index starts off low at 7:00 AM with a reading of 1, making it a safe time to be outdoors. As the sun rises higher, the index climbs dramatically, peaking at 11 by 11:00 AM—a clear indicator that sun protection is essential during this time. Although it remains high at 10 at 12:00 PM, there's a gradual decline from 1:00 PM, where it drops to 8. By mid-afternoon, it further decreases to 6 at 2:00 PM and continues to dwindle until it reaches 0 after 6:00 PM. The data highlights the importance of being sun-smart during the peak hours of 10 AM to 2 PM, when UV exposure is at its highest, ensuring you stay safe while enjoying the outdoors.

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	10	very high	15 min
13:00	8	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 Catu

The UV Index experiences extreme levels throughout most of the year, with particularly high-risk months occurring from January to April, where the Index consistently reaches 14, requiring just 10 minutes of exposure before burning occurs. Although there is a slight reduction in June and July with a UV Index of 9 and 10, respectively, the risk remains very high, with a burn time of 15 minutes. From August to November, the UV Index rises again, reaching levels of 12 to 15, and maintaining a burn time of 10 minutes in most cases. Given these seasonal fluctuations, it is crucial for both visitors and residents to take protective measures such as applying sunscreen, wearing protective clothing, and seeking shade during peak hours to minimize skin damage from UV exposure.

Monthly Maximum UV Index for Catu, Brazil

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

The table above highlights how UV exposure in Catu 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.

Catu'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
Catu	14	14	14	13	11	9	10	12	12	14	15	14
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13