Last updated: July 2, 2025
Understanding the UV Index in Ikeda, Japan, is crucial for protecting your skin and overall health. With UV levels reaching a peak of 10 around noon, awareness is essential for preventing sunburn and long-term skin damage. Ikeda's Dfb climate—characterized by distinct seasons—means that UV exposure can vary significantly. During sunny days, especially in summer, the risk of harmful UV radiation is heightened. By keeping an eye on the UV Index, you can enjoy the outdoors while safeguarding your skin from its damaging effects.
As the sun rises, the UV Index begins its ascent, peaking spectacularly between 11:00 AM and 12:00 PM at a maximal value of 10, signaling a high risk for unprotected skin. Early morning hours, from 7:00 AM to 9:00 AM, see a gentle increase from a mild 3 to a moderate 7. However, by 10:00 AM, the intensity climbs sharply to 9, urging caution for sun exposure. After the midday zenith, the index gradually descends, dropping to 8 at 1:00 PM and continuing to fall until it reaches a minimal 0 by 7:00 PM. This data emphasizes the importance of sun safety, particularly during those peak hours when the sun’s rays are most potent.
| 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 | 9 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | 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 |
Throughout the year, the UV Index demonstrates significant seasonal variation, with particularly high-risk months occurring from April to September. During this period, the UV Index frequently reaches levels categorized as very high, peaking at 10 in June and July. This translates to a dangerously short burn time of just 15 minutes, emphasizing the importance of sun protection, including sunscreen, hats, and protective clothing. As the year progresses into October and November, the UV Index decreases to more moderate levels, allowing for greater exposure times of 30 minutes without immediate risk of skin damage. Visitors and residents are advised to remain vigilant during peak UV months, seeking shade and reapplying sunscreen as necessary to safeguard their skin health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ikeda | 2 | 3 | 5 | 8 | 8 | 10 | 10 | 9 | 8 | 5 | 3 | 2 |
| Sapporo UVI | 2 | 3 | 6 | 7 | 9 | 9 | 9 | 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 |