UV Index in Oeiras, Brazil

Last updated: May 3, 2025

Understanding the UV Index in Oeiras, Brazil, is crucial for promoting sun safety and protecting skin health in this tropical climate. With UV levels spiking to a maximum of 12 during the midday hours, awareness becomes vital to prevent sunburn and long-term skin damage. As Oeiras experiences intense sun exposure, particularly from 10 AM to 2 PM, knowing the UV Index allows you to take necessary precautions and enjoy the sunny days while safeguarding your skin against harmful rays. Stay informed, stay protected!

Hourly UV Index in Oeiras

At sunrise, the UV Index starts at a mild 1 at 7:00 AM, offering a gentle welcome to the day. As the sun climbs higher, the intensity increases, reaching a moderate 3 by 8:00 AM. By 9:00 AM, it escalates to a strong 6, signaling the need for sun protection. The peak arrives at 11:00 AM and 12:00 PM, where the UV Index hits a staggering 12, indicating extreme levels of UV radiation. As the afternoon progresses, the intensity gradually declines, dropping to 8 at 2:00 PM and continuing to diminish through the late afternoon—4 at 3:00 PM, 2 at 4:00 PM, and finally returning to a safe 1 by 5:00 PM. The day winds down with no UV concern after 6:00 PM as the index falls to 0, allowing for a worry-free evening under the twilight sky.

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	10	very high	15 min
11:00	12	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	8	very high	15 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 Oeiras

The UV Index throughout the year displays extreme levels, particularly from January through November, with values consistently between 12 and 15, indicating a high risk of harm from unprotected sun exposure. Notably, the highest UV Index occurs in March at 15, closely followed by February and April at 14. Visitors and residents should take special care during these high-risk months and consistently throughout the year, ensuring they wear appropriate sun protection, including sunscreen, hats, and UV-protective clothing. With a burn time of only 10 minutes, it is crucial to limit sun exposure, especially during midday when UV radiation is at its peak.

Monthly Maximum UV Index for Oeiras, Brazil

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

The table above highlights how UV exposure in Oeiras 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.

Oeiras'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
Oeiras	14	14	15	14	12	11	11	12	13	13	14	14