UV Index in Guaraniacu, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Guaraniacu, Brazil, where the warm Cfa climate brings not only sunshine but also significant UV exposure risks. Awareness of UV levels can help prevent sunburn and protect skin health, ensuring that outdoor activities remain enjoyable and safe. With peak UV values soaring as high as 8 between 12:00 PM and 1:00 PM, it’s essential to be vigilant during these hours to minimize harmful effects from the sun. Knowing the UV Index empowers you to take the necessary precautions for a healthier, happier life under the Brazilian sun.

Hourly UV Index in Guaraniacu

As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM and remaining low at 8:00 AM. By 9:00 AM, it edges up to 2, but the real intensity kicks in at 10:00 AM with a surge to 4. The peak occurs around 12:00 PM and 1:00 PM, where it reaches a scorching 8, representing a significant rise in UV exposure. As the afternoon unfolds, the index begins its descent, dropping to 6 by 2:00 PM and easing to 4 by 3:00 PM. Before the sun sets, the UV levels taper off quickly, with readings of 2 at 4:00 PM and declining to 0 by 6:00 PM. This hourly data serves as a reminder to stay protected during peak UV hours, particularly between 11:00 AM and 1:00 PM.

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	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	7	high	25 min
12:00	8	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 Guaraniacu

During the year, UV levels fluctuate significantly, with particularly high-risk months occurring from January to April and September to November. Notably, these months have an extreme UV Index of 15-11, with a very short burn time of just 10 minutes. The UV Index starts to decrease in May and July, where it shifts to a very high and high exposure category, allowing for slightly longer burn times of 15 to 25 minutes. August sees a rise again before returning to extreme levels in September and October. Visitors and residents should take precautionary measures during high UV months: wear sunscreen, protective clothing, and hats, and seek shade when outside, especially during midday hours to reduce the risk of skin damage.

Monthly Maximum UV Index for Guaraniacu, Brazil

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

The table above highlights how UV exposure in Guaraniacu 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.

Guaraniacu'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
Guaraniacu	15	15	13	11	8	6	7	9	11	14	15	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