Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Asan, South Korea, where the effects of sun exposure can be particularly pronounced. With a climate characterized by significant seasonal variations, awareness of UV levels is essential for preventing sunburn and protecting skin health. From morning until afternoon, Asan experiences fluctuating UV levels, peaking around noon with values hitting as high as 11. As the sun's rays can cause substantial damage even on seemingly mild days, staying informed about the UV Index can help you enjoy the outdoors safely while minimizing potential risks to your skin.
The UV Index throughout the day showcases a dramatic rise and fall that is vital for sun safety. Starting at 07:00, it begins with a low reading of 1, but by 08:00, it climbs to 3. The intensity peaks between 11:00 and 13:00, soaring to an impressive 11, indicating a significant risk for harm without sun protection. As the afternoon progresses, the index starts to decline, dipping to 10 at 14:00, then falling further to 7 by 15:00. As evening approaches, the UV Index drops quickly, reaching a low of 1 by 18:00 and remaining there until 19:00. To enjoy the outdoors safely, be sure to slather on the sunscreen during that midday surge!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk. High-risk months are primarily from April to August, where the UV Index peaks at 11, categorized as extreme, with a burn time of just 10 minutes. April and May also see a very high UV Index of 9, necessitating careful sun protection measures. As visitors and residents engage in outdoor activities, it is crucial to remain vigilant in these months. Sunscreen, protective clothing, and seeking shade are highly advisable, especially during peak hours between 10 AM and 4 PM. From September to March, while the risk decreases, maintaining sun safety remains important with a moderate to high UV Index. Always be prepared, regardless of the season, to enjoy the sun safely!
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Incheon UVI | 3 | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 9 | 6 | 4 | 3 |
| Seoul UVI | 3 | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 9 | 6 | 4 | 3 |
| Asan | 3 | 4 | 6 | 9 | 9 | 11 | 11 | 11 | 9 | 7 | 5 | 3 |
| Daejeon UVI | 3 | 5 | 7 | 9 | 9 | 11 | 11 | 12 | 10 | 7 | 5 | 3 |
| Daegu UVI | 3 | 5 | 7 | 10 | 10 | 11 | 12 | 12 | 10 | 7 | 5 | 3 |
| Busan UVI | 4 | 5 | 7 | 10 | 10 | 11 | 12 | 12 | 10 | 7 | 5 | 3 |