Last updated: May 3, 2025
In San Jose, Argentina, staying aware of the UV Index is crucial for maintaining healthy skin and preventing sunburn. With a BSk climate that often features sunny days, understanding UV levels can help you take necessary precautions against harmful sun exposure. Typically peaking at a UV Index of 7 around midday, it's important to recognize that even a brief period of outdoor activity during these hours can pose risks to your skin health. By keeping an eye on the daily UV forecast, you can enjoy the sunshine safely while minimizing your risk of skin damage.
During the day, the UV Index follows a dynamic pattern, peaking in the early afternoon. At 07:00, the index begins at a safe 0, gradually rising to 1 by 08:00. As the sun climbs higher, the values increase steadily—reaching 2 at 10:00 and then escalating to 4 by 11:00. The intensity spikes at 12:00, soaring to 6, before peaking at an impressive 7 at 13:00. The UV levels then begin to taper off, decreasing to 6 at 14:00 and further dropping to 5 by 15:00. As the afternoon wanes, the index declines to 3 at 16:00, and finally settles back at 1 by 17:00 and 18:00, before returning to 0 by 19:00. This hourly data highlights the importance of sun safety, especially during those peak hours when UV exposure is highest.
| 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 | 4 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV levels fluctuate significantly, with the highest risk months occurring from January to March and again in October to November, when the UV Index reaches extreme levels (up to 16), with a burn time of just 10 minutes. The transition in risk continues with April marking a shift to very high exposure (UV Index 10, burn time 15 minutes), while May through July sees a moderate reduction, where the UV Index ranges from 5 to 7 and burn times increase to 25-30 minutes. August maintains high exposure levels similar to July, before returning to very high levels in September. Visitors and residents are advised to take precautions during high UV months by wearing protective clothing, applying sunscreen frequently, and limiting sun exposure during peak hours to minimize the risks of skin damage.
UV Risk Categories
| 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 |
| 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 Jose | 16 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |
| San Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |