Last updated: June 2, 2025
Understanding the UV Index in Ina, Japan is essential for anyone looking to protect their skin and overall health from harmful ultraviolet radiation. With the UV levels peaking at 11 during midday, awareness of these fluctuations can significantly aid in sunburn prevention and reducing long-term skin damage. Ina's Dfb climate features distinct seasons, but during warmer months, the risk of high UV exposure is notably elevated. As you step outside, staying informed about the UV Index empowers you to make safer choices for enjoying the great outdoors without compromising your skin health.
As the sun rises, the UV Index begins at a gentle 2 at 7:00 AM, making early hours perfect for outdoor plans. However, by 8:00 AM, it ramps up to 5, signaling a need for some sun protection. The intensity peaks at 11:00 AM with a UV Index of 11, indicating extreme levels, and remains intense until 1:00 PM. From there, it gradually begins to taper down, dropping to 8 by 2:00 PM and further declining to 3 by 4:00 PM. As the day winds down, the UV Index drops to 0 by 7:00 PM, providing a cool relief from the midday sun. Stay safe and enjoy the sun wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 8 | very high | 15 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
As the seasons change, so do the UV Index levels, significantly influencing sun exposure risk throughout the year. High-risk months are from March to August, when the UV Index peaks at 11 to 12, indicating extreme exposure with a burn time as short as 10 minutes. Particularly critical are May and July, when the UV Index consistently reaches its maximum. Conversely, the winter months of January and December present a moderate risk with an Index of 4, allowing for a safer exposure time of 30 minutes. To ensure safety, visitors and residents are advised to take precautions during high UV Index months by wearing sunscreen, protective clothing, and seeking shade, especially during midday hours when UV exposure is greatest.
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 |
| 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 |
| Ina | 4 | 6 | 9 | 10 | 11 | 11 | 12 | 12 | 10 | 7 | 6 | 4 |