Last updated: June 2, 2025
Understanding the UV Index in Asahikawa, Japan, is crucial for safeguarding your skin and overall health. As one of the northern cities in Japan, Asahikawa experiences a Dfb climate, resulting in varying levels of UV exposure throughout the day, especially during the summer months. With peak UV Index readings reaching 9 between 11:00 AM and 12:00 PM, awareness of UV levels helps in preventing sunburn and reducing the risk of skin damage. Being informed about these fluctuations empowers residents and visitors alike to take appropriate precautions, ensuring a safe and enjoyable time under the sun.
As the sun rises, the UV Index begins its ascent, reaching a modest 3 by 7:00 AM. However, as the morning matures, it quickly climbs to 5 at 8:00 AM and reaches a peak of 9 from 11:00 AM to 12:00 PM, indicating a high level of UV exposure. By 1:00 PM, the index starts to decline slightly to 8, and continues its descent until it falls to 5 by 3:00 PM. The afternoon sun starts to wane with values dropping to 3 by 4:00 PM, and by 6:00 PM, we're left with a minimal 1 for the rest of the evening. It's a vital reminder to protect your skin during those peak hours when the UV Index is at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | 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 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant seasonal changes, impacting the risk of sunburn and the need for protective measures. The highest risk months are from May to September, characterized by very high UV Index levels of 9 to 10 and a burn time of just 15 minutes. In contrast, January and December present a much lower risk with a UV Index of 2, allowing for longer exposure times of 45 minutes. Residents and visitors are advised to take special care during peak months by wearing protective clothing, using sunscreen, and seeking shade to minimize UV exposure. As conditions fluctuate, it's essential to stay informed and adjust sun protection strategies accordingly.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sapporo UVI | 2 | 3 | 6 | 7 | 9 | 9 | 9 | 10 | 8 | 5 | 3 | 2 |
| Asahikawa | 2 | 3 | 6 | 7 | 9 | 9 | 10 | 10 | 8 | 5 | 3 | 2 |
| Yokohama UVI | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
| Tokyo UVI | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
| Nagoya UVI | 4 | 6 | 8 | 10 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 3 |
| Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |