UV Index in Santa Fe, Argentina

Last updated: June 2, 2025

Understanding the UV Index in Santa Fe, Argentina is essential for safeguarding your skin against harmful ultraviolet rays. With high UV levels typically peaking during the midday hours, being aware of these readings can help you take necessary precautions to prevent sunburn and promote overall skin health. Santa Fe’s Cfa climate presents unique challenges, as its warm, sunny days often lead to increased UV exposure risks that can significantly impact your well-being. Stay informed and proactive, so you can enjoy the beautiful outdoors while protecting your skin!

Hourly UV Index in Santa Fe

At dawn, the UV Index remains nonexistent until 8:00 AM, when it registers a low 1, gradually climbing as the day unfolds. By 10:00 AM, it reaches 2, and as the sun reaches its zenith at 12:00 PM, the index peaks at a moderate 4. This peak is maintained until 2:00 PM, where the sun’s intensity persists, before gradually tapering off in the afternoon. At 3:00 PM, the UV Index drops back down to 3, continuing its decline to 1 by 5:00 PM, and ultimately settling back to 0 by 6:00 PM. As evening approaches, the UV radiation fades, highlighting the importance of sun protection during those midday hours when it’s most potent.

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	3	moderate	30 min
12:00	4	moderate	30 min
13:00	4	moderate	30 min
14:00	4	moderate	30 min
15:00	3	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 Santa Fe

The UV Index shows significant seasonal changes, with high-risk months occurring from January through March and again in October to December, all categorized as extreme with a burn time of just 10 minutes. April marks a transition to a very high exposure category, where burn time extends to 15 minutes, while May to August presents high to moderate conditions with burn times ranging from 25 to 30 minutes. As temperatures rise into summer, UV risks decrease slightly; however, September spikes again to very high levels. Visitors and residents are advised to take precautions during the high UV index months, which can include wearing protective clothing, using sunscreen, and seeking shade, particularly during peak hours to minimize the risk of skin damage.

Monthly Maximum UV Index for Santa Fe, Argentina

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

The table above highlights how UV exposure in Santa Fe compares to other major locations across Argentina. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Santa Fe's solar exposure compared to other cities in Argentina. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Buenos Aires UVI	14	13	11	7	5	4	4	6	8	10	13	14
Rosario UVI	14	13	11	8	5	4	4	6	8	11	13	14
Santa Fe	14	13	11	8	6	4	5	6	9	11	14	14
Mendoza UVI	15	14	12	8	6	4	5	6	9	12	14	15
Cordoba UVI	15	13	12	9	6	4	5	7	9	12	14	15
San Miguel de Tucuman UVI	15	14	13	10	7	5	6	7	10	13	15	15