Last updated: May 3, 2025
In Koesan, South Korea, awareness of the UV Index is crucial for protecting your skin from harmful sunlight. Understanding UV levels helps prevent painful sunburn and contributes to overall skin health. With Koesan's Dwa climate, residents and visitors often experience significant UV exposure, particularly between 10:00 AM and 2:00 PM when the index peaks at 9. By staying informed about the UV Index, you can enjoy outdoor activities safely while minimizing the risks associated with high UV radiation.
The UV Index throughout the day showcases a notable crescendo peaking at 12:00 PM, where it reaches an impressive 9, indicating a very high risk of harm from unprotected sun exposure. The day starts off quite mild, with a maximum of 1 at 7:00 AM, gradually climbing as the sun rises higher in the sky. By 10:00 AM, the index hits 7, suggesting that sun protection is essential, especially as it climbs to 8 by 11:00 AM. From 12:00 PM to 1:00 PM, UV levels remain at a dangerous 9, before gradually declining in the afternoon, ending on a much safer note of 1 at 7:00 PM. It’s a reminder to enjoy the sun but stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, peaking during the summer months. January and February show moderate levels of UV exposure (Index 3-4), with a burn time of 30 minutes, suggesting that while sun safety is recommended, the risk is lower. However, from March onward, the risk increases notably, reaching a high index of 6 in March and escalating to very high levels (Index 9) in April and May, where burn times drop to just 15 minutes. The summer months of June, July, and August present extreme conditions, with an Index of 11 and a mere 10-minute burn time, marking these as high-risk months. As temperatures begin to cool in September, the Index remains high at 10 before decreasing in October to 7 and returning to moderate levels by November and December. Residents and visitors should exercise heightened caution and employ sun protection measures during the spring and summer months, particularly when the UV Index exceeds 6, to prevent harmful sun exposure.
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 |
| Koesan | 3 | 4 | 6 | 9 | 9 | 11 | 11 | 11 | 10 | 7 | 4 | 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 |