Last updated: July 2, 2025
In Bungo-ono, Japan, understanding the UV Index is crucial for safeguarding your skin health and preventing sunburn. With a climate that falls under the Cfa zone, residents and visitors are exposed to varying UV levels throughout the day, peaking at a maximum of 12 around midday. By paying attention to these UV levels, especially during the high-risk hours of 10 AM to 2 PM, you can take proactive measures to protect yourself from harmful rays. Whether you're enjoying outdoor activities or simply soaking in the beauty of Bungo-ono, being aware of the UV Index ensures you keep your skin safe and healthy under the sun.
The UV Index for the day reveals a dynamic shift in sun exposure, peaking dramatically between 11:00 AM and 1:00 PM. Starting the morning with a mild maximum of 2 at 7:00 AM, the index steadily rises, reaching 12 by midday—an indication of high risk for harm from unprotected sun exposure. As the afternoon progresses, it dips to 10 at 2:00 PM and then gradually decreases to a more moderate level of 4 by 4:00 PM. By the evening, the UV Index settles back down to 1 by 6:00 PM, signaling a safe time to enjoy the outdoors again. Be sure to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | 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, with the highest risk months emerging from March to September. During this period, the UV Index peaks at 12, indicating an extreme exposure category from May to August, requiring only 10 minutes of sun exposure before risking skin damage. Conversely, January and December feature a moderate UV Index of 4, allowing for about 30 minutes of safe exposure. Visitors and residents are advised to take extra precautions during high-risk months, such as wearing sunscreen, protective clothing, and seeking shade during peak hours, particularly in the summer months when the potential for sunburn is acute. As the UV Index starts to decline in October and November, a return to more moderate sun safety measures becomes appropriate.
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 |
| Bungo-ono | 4 | 6 | 9 | 11 | 12 | 11 | 12 | 12 | 11 | 7 | 6 | 4 |