UV Index in Cacoal, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Cacoal, Brazil, where high levels of solar radiation are common due to its tropical climate. Being aware of UV levels helps to prevent sunburn and protects skin health, especially during peak hours when the UV Index soars. With readings reaching up to 10 at noon, it's essential for locals and visitors alike to take precautions against harmful exposure. As Cacoal experiences prolonged periods of sunlight, staying informed on the UV Index can be the key to enjoying the sun safely and maintaining vibrant skin health.

Hourly UV Index in Cacoal

The hourly UV Index reveals a dynamic range of sun exposure today. Starting off at a gentle 1 at 7:00 AM, the index steadily climbs, peaking at a striking 10 by 12:00 PM—the peak exposure time. As the sun reaches its zenith, caution is advised for outdoor activities during the 11:00 AM to 1:00 PM window when the index remains high at 9 and 10. Following this midday surge, the index gracefully descends; by 3:00 PM, it dips to 4 and continues to decline to 1 by 5:00 PM. Finally, after a brief respite, the UV rays fade to 0 by 6:00 PM, signaling a safe return for evening outdoor plans. Stay sun-smart and enjoy the day wisely!

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	2	low	45 min
09:00	4	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	9	very high	15 min
14:00	7	high	25 min
15:00	4	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 Cacoal

The UV Index experiences significant variations throughout the year, with extreme levels persisting from January through April and returning in August to November. The months with the highest UV Index are from January to April, where it peaks at 16, indicating a high-risk period for sunburn with a minimal burn time of just 10 minutes. In contrast, from June to July, the index drops slightly to 10, categorized as very high, allowing for a burn time of up to 15 minutes. Visitors and residents should exercise caution during these high-risk months, particularly in January, February, and March, by minimizing sun exposure, wearing protective clothing, and applying sunscreen regularly to prevent skin damage.

Monthly Maximum UV Index for Cacoal, Brazil

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

The table above highlights how UV exposure in Cacoal 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.

Cacoal'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
Cacoal	15	16	16	15	11	10	10	11	12	14	15	15