UV Index in Rio Piracicaba, Brazil

Last updated: June 2, 2025

Understanding the UV Index is essential for residents and visitors in Rio Piracicaba, Brazil, where the Cwa climate brings distinct sun exposure patterns. As UV levels can soar to 7 during midday, awareness of these fluctuations is vital for safeguarding your skin against sunburn and long-term damage. With typical risks associated with high UV exposure, especially between 10 AM and 2 PM, knowing when to seek shade or apply sunscreen can make all the difference in maintaining your skin health under the Brazilian sun.

Hourly UV Index in Rio Piracicaba

The UV Index data paints a clear picture of how exposure to ultraviolet rays varies throughout the day. Starting at a low level of 1 at 07:00, the index gradually climbs to peak at 7 from 11:00 to 12:00, indicating the times when sun protection is most crucial. As the afternoon progresses, the index dips to 6 at 13:00, then gently declines to 4 by 14:00. The evening hours see a significant drop, with values falling to 2 at 15:00 and retreating to 1 at 16:00. By nightfall, the UV Index drops to 0 from 18:00 onward, signalling a safe time for outdoor activities without the need for sun protection. Enjoy the sunshine, but be mindful of the 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	2	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	7	high	25 min
13:00	6	high	25 min
14:00	4	moderate	30 min
15:00	2	low	45 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 Rio Piracicaba

The UV Index experiences significant seasonal fluctuations, with the highest levels occurring from January to April, where the index is classified as extreme (ranging from 14 to 17) and the burn time is a mere 10 minutes. This trend continues into September through November, maintaining an extreme exposure category and a consistent burn time of 10 minutes. In contrast, the summer months from May to August present a lower UV Index, categorized as very high to high, allowing for slightly longer burn times of 15 to 25 minutes. Visitors and residents are advised to exercise caution during the peak months of January, February, March, April, September, October, and November. It is crucial to take protective measures such as wearing sunscreen, protective clothing, and sunglasses, especially during these high-risk months to minimize the risk of skin damage.

Monthly Maximum UV Index for Rio Piracicaba, Brazil

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

The table above highlights how UV exposure in Rio Piracicaba 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.

Rio Piracicaba'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
Rio Piracicaba	17	15	14	12	9	7	8	10	12	14	15	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