UV Index in Santiago, Brazil

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Santiago, Brazil as it directly impacts skin health and sunburn prevention. Being aware of daily UV levels can help you take protective measures during peak hours, especially when the index rises to 5 between 12:00 PM and 2:00 PM. Santiago's Cfa climate features warm summers and mild winters, but with high UV exposure risks during sunny days, knowing how to safeguard your skin is essential for enjoying the beautiful outdoors while minimizing harmful effects. Stay informed and protect your skin with simple yet effective precautions!

Hourly UV Index in Santiago

The UV Index data for the day reveals a progressive ascent in solar intensity, starting from a peaceful 0 at 07:00. As the sun rises higher in the sky, it peaks at 5 between 12:00 and 13:00, indicating a moderate risk for sun exposure. 11:00 and 10:00 see values of 4 and 2 respectively, signaling an increasing need for sun safety measures. As the afternoon unfolds, readings gently descend, dropping back to 3 by 15:00 and tapering to 0 after 18:00. Overall, it’s a day where vigilance is key during the midday hours, while mornings and evenings offer a respite from harmful rays.

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	1	low	45 min
10:00	2	low	45 min
11:00	4	moderate	30 min
12:00	5	moderate	30 min
13:00	5	moderate	30 min
14:00	4	moderate	30 min
15:00	3	moderate	30 min
16:00	1	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 Santiago

The UV Index experiences significant seasonal fluctuations, with extreme levels recorded from January to March and again in October to December. These high-risk months indicate a UV Index of 14-15, where the burn time is as little as 10 minutes. In April, the index drops to 9, categorized as very high, allowing for a bit more sun exposure at 15 minutes before risking sunburn. As we move into late spring and summer, the UV levels decrease slightly, with May seeing a high index of 6 and a burn time of 25 minutes. June and July present moderate levels of UV exposure, while August climbs back to a high of 7. Notably, September spikes again to 10, emphasizing the need for vigilance. To ensure safety, visitors and residents should take extra precautions during these high-risk months by utilizing sunscreen, wearing protective clothing, and seeking shade to reduce sun exposure.

Monthly Maximum UV Index for Santiago, Brazil

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

The table above highlights how UV exposure in Santiago 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.

Santiago'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
Santiago	15	14	12	9	6	5	5	7	10	13	14	14
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