UV Index in San Justo, Argentina

Last updated: July 2, 2025

Understanding the UV Index is essential for residents of San Justo, Argentina, where the climate can lead to significant sun exposure year-round. Awareness of UV levels is crucial not only for preventing sunburn but also for maintaining long-term skin health, as overexposure can increase the risk of skin cancer. Throughout the day, particularly during midday hours when the UV Index peaks, San Justo experiences elevated UV radiation levels that necessitate proactive sun safety measures. With a climate classified as Cfa, characterized by warm summers, it is vital to stay informed and protect yourself against the sun's harmful effects.

Hourly UV Index in San Justo

The UV Index throughout the day reveals a dynamic pattern of solar intensity. Starting with a maximum of 0 at 7 AM, it gradually rises to a moderate 5 at 1 PM, where the sun shines its strongest. By 12 PM, the UV Index hits 4, prompting the need for sun protection. The intensity begins to taper off in the afternoon, dropping to 3 by 3 PM, and further decreasing to 1 by 5 PM. As twilight approaches, the UV Index settles back to 0 by 7 PM, signaling the end of the day's sun exposure. Plan accordingly, especially during those 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	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	5	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	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in San Justo

Throughout the year, UV exposure varies significantly, with high-risk months identified as January, February, March, October, November, and December, all experiencing an extreme UV Index of 14 or 13. The burn time during these months is notably short at just 10 minutes, indicating the need for heightened caution. Transitional months like April and September classify as very high with a UV Index of 9, allowing for 15 minutes before potential skin damage occurs. In contrast, the late spring and summer months (May to August) show high to moderate UV levels, allowing for longer exposure times up to 30 minutes in June and July. Visitors and residents are advised to adopt protective measures—such as applying sunscreen, wearing protective clothing, and seeking shade—especially during the extreme and very high months to mitigate the risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for San Justo, Argentina

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

The table above highlights how UV exposure in San Justo 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.

San Justo'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
San Justo	14	13	12	9	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