UV Index in Guaira, Brazil

Last updated: May 3, 2025

In Guaira, Brazil, staying informed about the UV Index is crucial for protecting your skin and maintaining overall health. With an Aw climate that brings warm, sunny days, understanding UV levels can prevent painful sunburns and reduce long-term skin damage. During the peak hours of 10 AM to 2 PM, when the UV Index in Guaira reaches a maximum of 9, the risk of harm increases significantly. By being aware of these numbers, residents and visitors can take proactive steps to enjoy the sun safely while safeguarding their skin against harmful UV radiation.

Hourly UV Index in Guaira

The UV Index today tells a compelling story of sun exposure throughout the day. Starting low at 1 by 07:00, it gradually climbs to a moderate 3 by 09:00. As the day progresses, the intensity peaks impressively at 9 around 12:00, signaling that the sun is at its most powerful. The afternoon remains vibrant but begins to taper off as we see a drop to 4 by 15:00. Post-sunset, the UV Index plummets to 0 between 18:00 and 19:00, indicating a retreat from harmful rays. It’s a day where staying sun-smart is crucial during the midday hours, especially between 10:00 and 14:00.

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	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	9	very high	15 min
13:00	8	very high	15 min
14:00	6	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 Guaira

The UV Index experiences significant fluctuations throughout the year, with extreme levels occurring from January to April and again in September to November, making these months particularly high-risk for sun exposure. In January, February, March, and April, the UV Index peaks at 16, indicating a burn time of just 10 minutes. As the seasons transition, the UV Index lowers in June to 7 and July to 8, where the exposure remains very high. However, even during the summer months, caution is advised, particularly from May to August, where burn times vary from 15 to 25 minutes. Residents and visitors should adopt sun-safe practices, such as wearing sunscreen, protective clothing, and seeking shade, especially during these high-risk periods. Regularly monitoring the UV Index is crucial to ensure safe outdoor experiences year-round.

Monthly Maximum UV Index for Guaira, Brazil

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

The table above highlights how UV exposure in Guaira 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.

Guaira'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
Guaira	16	16	13	11	9	7	8	10	12	14	14	16
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