UV Index in Registro, Brazil

Last updated: August 1, 2025

Understanding the UV Index in Registro, Brazil is essential for ensuring skin health and preventing sunburn, especially given the region's Cfa climate characterized by hot summers and significant UV exposure. With peak UV levels reaching up to 6 during midday, it’s vital for residents and visitors alike to be aware of these radiation levels to protect their skin while enjoying outdoor activities. By staying informed about the UV Index, you can safeguard your wellbeing and make the most of Registro's sunny days without risking sun-related damage.

Hourly UV Index in Registro

The UV Index for the day shows a notable increase in solar intensity as the morning unfolds. Starting at a mild 1 between 07:00 and 09:00, the index rises sharply, peaking at 6 from 11:00 to 13:00. This is a clear indication that midday sun demands caution, with later hours dropping to 5 at 14:00 and gradually decreasing toward evening. By 18:00 and 19:00, the UV Index dips to 0, signaling a safe time to be outdoors without sun protection. Overall, this day encourages sun safety practices during those peak hours when the UV rays are most potent.

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	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 Registro

Throughout the year, the UV Index exhibits significant seasonal variations, with extremely high levels observed from January to March and again from September to November. The highest recorded UV Index of 15 occurs in January, February, and December, indicating an extreme exposure category with a burn time of just 10 minutes. April marks a slight drop to a UV Index of 10 (very high), while May, June, and July present a moderate risk (UV Index of 6 to 7), allowing for longer exposure times of up to 25 minutes. As summer yields to early autumn, the risk increases again, peaking at 11 in September and declining slightly through October and November with UV Indexes of 13 and 14, respectively. Visitors and residents are strongly advised to take precautions during high-risk months, specifically from January to March and September to November, by wearing protective clothing, using broad-spectrum sunscreen, and limiting sun exposure during peak hours to avoid severe sunburn.

Monthly Maximum UV Index for Registro, Brazil

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

The table above highlights how UV exposure in Registro 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.

Registro'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
Registro	15	15	12	10	7	6	6	8	11	13	14	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