UV Index in Guacui, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Guacui, Brazil, as it plays a significant role in protecting skin health. With the region enjoying a Cwa climate, the sun can be particularly intense, especially during midday hours when UV levels peak at 9 around noon. This highlights the importance of staying informed about UV risks to prevent sunburn and long-term skin damage. By keeping an eye on the UV Index, you can make informed decisions about sun protection, ensuring safe and enjoyable outdoor experiences in this vibrant community.

Hourly UV Index in Guacui

As the day unfolds, the UV Index experiences a notable rise, peaking at 9 during the noon hour. Starting from a gentle 1 at 7:00 AM, it escalates steadily, reaching 7 by 10:00 AM and 8 by 11:00 AM. The intensity continues to surge, hitting its zenith of 9 at 12:00 PM, before gradually tapering off in the afternoon. By 3:00 PM, it dips to 3, and as the sun begins to set, the index drops to a low 0 by 7:00 PM, signifying a swift decline in UV radiation. This pattern underscores the importance of sun safety during the peak hours of 10:00 AM to 2:00 PM, when UV exposure is at its highest. Stay protected and enjoy the sun 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	7	high	25 min
11:00	8	very high	15 min
12:00	9	very high	15 min
13:00	7	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 Guacui

Throughout the year, the UV Index in the region shows significant seasonal variations, with extreme levels from January to April and notable spikes in September to November. The high-risk months for UV exposure are January to April and September to November, when the UV Index consistently reaches 15 to 16, indicating an extreme exposure category with a burn time of just 10 minutes. Visitors and residents should take precautionary measures during these periods, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade when outdoors, to mitigate the risk of sunburn and long-term skin damage. As summer approaches, while May sees a drop to 9 (very high), it remains essential to remain vigilant, especially in July and August, when the UV Index returns to 8 to 10 with 15-minute burn times.

Monthly Maximum UV Index for Guacui, Brazil

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

The table above highlights how UV exposure in Guacui 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.

Guacui'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
Guacui	16	15	14	12	9	7	8	10	12	14	15	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