Last updated: July 2, 2025
In Henderson, Argentina, staying informed about the UV Index is essential for maintaining healthy skin and preventing sunburn. Understanding UV levels can greatly influence your choices during outdoor activities, safeguarding against harmful effects of excessive sun exposure. The Cfa climate in Henderson invites plenty of sunshine, but with varying UV risks throughout the day. While the UV Index is low in the morning, it peaks around midday, reaching levels that warrant caution. By paying attention to these fluctuations, you can better protect yourself and enjoy the beautiful outdoors without worry.
The UV Index throughout the day showcases a gradual rise in sun intensity. Early morning hours from 07:00 to 09:00 present a low UV Index of 0-1, perfect for those who prefer to avoid harsh sunlight. As the clock strikes 10:00, it ticks up slightly to 1, reaching 2 by 11:00, indicating a shift towards moderate exposure. Noon brings the peak at 12:00, with a UV Index of 3, before hitting a high of 4 at 13:00. After this zenith, conditions begin to shift; the index gently descends, dropping back to 3 at 14:00 and returning to 2 from 15:00 to 16:00. As the sun starts to set, the index falls to 1 by 17:00 and finally drops to 0 after 18:00, signaling a safe end to outdoor activities. Overall, plan your sun exposure wisely—midday offers the most intensity!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 0 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 1 | low | 45 min |
| 11:00 | 2 | low | 45 min |
| 12:00 | 3 | moderate | 30 min |
| 13:00 | 4 | moderate | 30 min |
| 14:00 | 3 | moderate | 30 min |
| 15:00 | 2 | low | 45 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 |
Throughout the year, UV levels exhibit significant seasonal variations, with January and December experiencing the highest UV Index ratings of 14 in the extreme exposure category, leading to a burn time of just 10 minutes. Notably, February and November also present extreme UV levels at 12 and 13, respectively. The spring months of March (UV Index 10) and October (UV Index 10) fall into the very high category, requiring caution with a burn time of 15 minutes. As we transition into summer, the UV Index decreases to a moderate range of 3 to 5 from June to August, allowing for longer safe exposure times of 30 minutes. However, as fall approaches with a return to high levels in September (UV Index 7) and October, awareness and protection become crucial once again. To ensure safety, visitors and residents should prioritize sun protection during high-risk months, particularly from January to April and in October and November, by seeking shade, wearing protective clothing, and applying sunscreen regularly.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Henderson | 14 | 12 | 10 | 7 | 5 | 3 | 4 | 5 | 7 | 10 | 13 | 14 |
| 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 Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |