UV Index in Guaiuba, Brazil

Last updated: June 2, 2025

Awareness of the UV Index is essential for residents and visitors of Guaiuba, Brazil, where the sun shines brightly and exposure levels can vary significantly throughout the day. Understanding UV levels is crucial—not only for preventing painful sunburn but also for safeguarding long-term skin health. With Guaiuba's tropical climate, UV rays can be particularly intense, peaking during midday hours with indices reaching up to 11. By keeping an eye on the UV Index, you can take appropriate precautions to enjoy the sunny days safely while minimizing your risk of skin damage.

Hourly UV Index in Guaiuba

The UV Index throughout the day reveals a striking peak in intensity around midday. Beginning at a gentle 1 by 7:00 AM, the index escalates progressively, reaching a notable 11 by 11:00 AM and remaining high until 12:00 PM. As the afternoon unfolds, the intensity gradually diminishes, diving to 6 by 2:00 PM, then tapering off further to a soft 3 by 3:00 PM. By 4:00 PM and beyond, UV exposure recedes, settling back to a low 1 by 5:00 PM, and disappearing entirely after 6:00 PM. This dramatic rise and fall underscore the importance of sun safety during those 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	4	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	9	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 Guaiuba

The UV Index data reveals extremely high UV levels throughout the year, with peak values observed from March (15) to April (15). High-risk months include January through April and November, where the UV Index consistently hovers between 14 to 15, necessitating vigilance against sunburn within just 10 minutes of exposure. Visitors and residents are strongly advised to take precautionary measures during these months, such as wearing broad-spectrum sunscreen, protective clothing, and seeking shade during peak sunlight hours. Even in the later months of the year, October to December maintain a significant UV Index of up to 14, making it crucial to remain sun-safe year-round.

Monthly Maximum UV Index for Guaiuba, Brazil

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

The table above highlights how UV exposure in Guaiuba 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.

Guaiuba'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
Guaiuba	14	14	15	15	13	11	11	12	13	13	14	13