UV Index in Uniao, Brazil

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of União, Brazil as it plays a significant role in safeguarding skin health and preventing sunburn. In this vibrant region, where the climate is characterized by hot, tropical conditions, UV exposure can reach dangerously high levels, particularly between 10 AM and 2 PM. The UV Index can spike up to 11 during midday, signaling extreme risk for harmful effects on the skin. By staying informed about daily UV levels, residents can take proactive measures to ensure their well-being while enjoying the sun.

Hourly UV Index in Uniao

The UV Index today starts off modestly at 1 by 07:00, but as the sun rises higher, it peaks dramatically at 11 between 11:00 and 12:00, indicating a period of high risk for harm from unprotected sun exposure. At 09:00, it reaches 6, prompting a bit more caution, while 10:00 brings a significant jump to 9. As the afternoon unfolds, the index begins to decline, dropping to 4 by 15:00 and tapering off to 1 by 17:00. After 18:00, the UV Index falls to 0, ensuring that later in the day, the risk of UV exposure diminishes completely. Stay protected during those peak hours!

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	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	7	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 Uniao

The UV Index shows an extreme risk of harm from unprotected sun exposure throughout the year, with very high levels observed from January to March, peaking at 16 in March. This indicates that the sun’s rays can cause skin burn in as little as 10 minutes. April maintains a high UV Index of 15, and while there is a slight decrease in June and July (both at 11), the exposure risk remains severe. August and September return to a UV Index of 13, continuing the call for diligent sun protection. As October progresses to 12 and into the late autumn months, visitors and residents should still remain vigilant, especially since November and December retain a UV Index of 13. To minimize risk, it is essential for everyone to apply sunscreen, wear protective clothing, and seek shade during peak sun hours throughout all seasons.

Monthly Maximum UV Index for Uniao, Brazil

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

The table above highlights how UV exposure in Uniao 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.

Uniao'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
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
Uniao	14	14	16	15	13	11	11	13	13	12	13	13