UV Index in Guaraniacu, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Guaraniacu, Brazil, where the climate is characterized by warm summer days and a Cfa classification. With UV levels peaking around midday—reaching a high of 7—awareness of these UV levels is vital for preventing sunburn and protecting skin health. Prolonged exposure to the sun without proper protection can lead to serious health issues, making it essential to stay informed about UV risks. With Guaraniacu's sunny climate, knowing when to seek shade or apply sunscreen can make all the difference for enjoying the beautiful outdoors safely.

Hourly UV Index in Guaraniacu

The UV Index throughout the day showcases a clear peak between 12:00 PM and 1:00 PM, reaching a maximum of 7, indicating very high UV exposure during this midday period. As the morning progresses, the index climbs from a low of 0 at 7:00 AM to 3 by 10:00 AM, encouraging sun safety measures as it crosses into the moderate zone at 9:00 AM. Following the midday high, the UV levels begin to decline, dropping to 4 by 3:00 PM and easing down to 1 at 5:00 PM, ultimately returning to 0 by 6:00 PM. This pattern underscores the importance of sun protection during the peak hours when UV radiation poses significant risks.

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	0	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	3	moderate	30 min
11:00	5	moderate	30 min
12:00	7	high	25 min
13:00	7	high	25 min
14:00	5	moderate	30 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