UV Index in Guapiacu, Brazil

Last updated: May 3, 2025

Understanding the UV Index in Guapiacu, Brazil, is crucial for maintaining your skin's health and preventing sunburns. With a tropical climate typical of the Aw zone, Guapiacu experiences significant UV exposure, especially during peak hours when the index can reach as high as 8. This means that residents and visitors alike must be vigilant about sun protection strategies. By staying informed about UV levels throughout the day, you can enjoy the sunny beauty of Guapiacu while safeguarding your skin from harmful rays.

Hourly UV Index in Guapiacu

As the sun rises, the UV Index remains low in the early hours, peaking at 1 between 07:00 and 08:00. However, as the day progresses, the intensity escalates dramatically. By 10:00, it reaches a moderate 6, surging to a maximum of 8 from 11:00 to 13:00—the peak time for sun exposure. Just before the afternoon wanes, the index begins to gently decline, dropping to 6 at 14:00, 4 at 15:00, and further down to 2 by 16:00. As evening approaches, the risk diminishes significantly, easing to 1 by 17:00 and falling to 0 by 18:00 and 19:00. It’s a clear reminder that while midday offers the highest sun exposure, the UV risk decreases as the sun sets.

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	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 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 Guapiacu

The UV Index shows significant seasonal variation, with extremely high levels persisting from January to April and then again in September to December. High-risk months include January, February, March, April, September, October, November, and December, where the UV Index remains at 13 or above, indicating a burn time of just 10 minutes. Even during the summer months, while the risk drops slightly to a very high level in May, July, and August, visitors and residents should remain vigilant. It is crucial to take protective measures, such as wearing sunscreen, seeking shade, and wearing protective clothing during these periods of high UV exposure, particularly in the peak months.

Monthly Maximum UV Index for Guapiacu, Brazil

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

The table above highlights how UV exposure in Guapiacu 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.

Guapiacu'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
Guapiacu	16	16	13	11	8	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