UV Index in Joinville, Brazil

Last updated: June 2, 2025

Understanding the UV Index is essential for residents of Joinville, Brazil, as it plays a critical role in protecting skin health and preventing sunburn. With its Cfa climate, Joinville experiences significant UV exposure, especially around midday when levels peak at 6. By being aware of these UV levels, you can take proactive steps to shield yourself from harmful rays, ensuring your time outdoors is both enjoyable and safe. Stay informed about the UV Index to make smarter decisions for your health under the Brazilian sun!

Hourly UV Index in Joinville

The UV Index today showcased a notable increase from the early morning hours, starting at a gentle 1 at 07:00 and 08:00. As the sun rose higher in the sky, the index climbed steadily, reaching a significant 6 by 12:00, indicating a peak in UV radiation and the need for sun protection. The afternoon saw a slight decline, with values dropping to 4 at 14:00 and falling further to 2 by 15:00. As the day wound down, the UV index returned to a safer range, ending the day at 0 by 19:00. It’s crucial to stay informed and safeguard your skin during those high UV 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	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	5	moderate	30 min
12:00	6	high	25 min
13:00	5	moderate	30 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 Joinville

The UV Index exhibits significant seasonal variations, peaking at extreme levels from January to March and again in October through December, with values soaring to 15. Notably, February and November also maintain an index of 14, indicating extremely high risks for sunburn, with minimal burn times of just 10 minutes. Transitioning into the spring and summer months, the UV Index decreases to a very high level of 10 in April and 8 in August, while the burn time gradually increases to 15 and 25 minutes in May and June, respectively. July and August maintain a high risk, with burn times extending to 25 minutes, before returning to very high in September. Given these data, it's crucial for visitors and residents alike to practice sun safety—especially from January through March and again from October to November—by seeking shade, wearing protective clothing, and applying sunscreen regularly to mitigate the risk of UV exposure.

Monthly Maximum UV Index for Joinville, Brazil

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

The table above highlights how UV exposure in Joinville 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.

Joinville'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
Joinville	15	14	12	10	7	6	6	8	10	13	14	15
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