UV Index in Sao Francisco, Brazil

Last updated: June 2, 2025

In São Francisco, Brazil, staying informed about the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels helps in sunburn prevention and long-term skin protection, particularly in a region where sunny days are frequent. With a climate that promotes outdoor activities, it's essential to recognize the peak UV exposure risks, which can soar as high as 9 around midday. As you enjoy the beautiful sunshine, being aware of the UV Index can ensure your adventures remain safe and enjoyable!

Hourly UV Index in Sao Francisco

The UV Index starts off gently at 1 around 7:00 AM, gradually rising to 2 by 8:00 AM. As the day progresses, the intensity peaks at 12:00 PM with a stunning 9, signaling a high risk for overexposure. The afternoon sees a slight decline, tapering to 8 at 1:00 PM and 5 by 2:00 PM, before swiftly dropping to 3 and 1 from 3:00 PM to 5:00 PM. As evening approaches, the UV levels plunge to 0 by 6:00 PM, offering a reprieve as the sun sets. It's clear that midday is the time to take protective measures, ensuring you enjoy the sunshine safely!

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	4	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	9	very high	15 min
13:00	8	very high	15 min
14:00	5	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 Sao Francisco

Throughout the year, UV Index levels demonstrate significant seasonal variation, highlighting periods when both visitors and residents must exercise caution to avoid harmful sun exposure. The highest risk months occur from January to April, when UV Index values soar to 16-13 in the extreme category, necessitating a burn time of just 10 minutes. August and September also present high risks with UV Index levels of 12, indicating extreme exposure once again. The late spring and summer months, particularly May through July, maintain a very high exposure category with a UV Index ranging from 10 to 9, but slightly longer burn times of 15 minutes. To protect skin health, it is vital for everyone to take necessary precautions during these high-risk periods, including seeking shade, wearing protective clothing, and applying sunscreen regularly.

Monthly Maximum UV Index for Sao Francisco, Brazil

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

The table above highlights how UV exposure in Sao Francisco 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.

Sao Francisco'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
Sao Francisco	16	15	14	13	10	9	9	12	12	14	15	15
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13