Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Colonia San Bartolome, Argentina, where sun exposure can pose significant health risks. With a climate classified as Cfa, you can expect typically warm summers and mild winters, but this also means periods of elevated UV levels, particularly during midday hours. By staying informed about UV levels, you can effectively prevent sunburn, protect your skin health, and enjoy the sun safely. Notably, the UV Index in Colonia San Bartolome peaks at 5 around 1 PM, highlighting the importance of proactive sun safety measures during these hours.
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!
| 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 |
The UV Index exhibits significant seasonal fluctuations, with extreme levels in the winter months of January (14), February (13), March (12), and the latter part of the year, including October (11), November (14), and December (14), where the burn time is a mere 10 minutes. High-risk months for UV exposure notably include January, February, March, October, and November, all categorized as extreme risk. As we transition into spring and summer, the UV Index decreases slightly, with April at 8 (very high) and May at 6 (high), while UV levels remain moderate in June and July (4 and 5, respectively). By late summer and early fall, September experiences a spike back to 9 (very high). Visitors and residents should take precautionary measures during high-risk months by wearing protective clothing, applying sunscreen regularly, and limiting sun exposure during peak hours to safeguard against harmful UV radiation.
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 |
| Colonia San Bartolome | 14 | 13 | 12 | 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 |