Last updated: May 3, 2025
In Suzu, Japan, staying informed about the UV Index is essential for protecting your skin and overall health. Understanding UV levels can help you prevent sunburn and reduce the risk of long-term skin damage, making it crucial for residents and visitors alike. With Suzu’s humid subtropical climate (Cfa), individuals often enjoy outdoor activities but must be aware of the peak UV exposure times, particularly when the index reaches a high of 10 around noon. Being vigilant about UV levels can help ensure a safe and enjoyable experience under the sun.
The UV Index throughout the day showcases a significant rise in solar intensity, peaking at 12:00 PM with a robust level of 10. Early risers will experience moderate exposure, with values starting at 2 by 7:00 AM and gradually climbing. By 10:00 AM, the UV Index reaches 8, prompting a recommendation for protective measures. The afternoon sees it peak again at 11:00 AM with a 9 before tapering off in the subsequent hours. As the sun starts to descend, the UV levels decline noticeably, dropping to 0 by 7:00 PM. It's essential to stay mindful of these fluctuations, especially during midday when the sun is at its strongest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | 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 | 0 | low | 45 min |
Throughout the year, UV exposure varies significantly, peaking during the summer months. The highest risk for sunburn occurs from April to August, with the UV Index reaching extreme levels of 11 in both July and August, where the burn time is as short as 10 minutes. March marks the transition to higher UV levels, classified as high, and offers a burn time of 25 minutes. As spring progresses into summer, the risk escalates, with the very high category dominating from April through September, emphasizing the need for sun protection. Visitors and residents should take precautionary measures during these high-risk months, including wearing sunscreen, protective clothing, and seeking shade, especially during peak hours. As the year winds down, November and December return to a moderate UV Index (3-4), allowing for more time outdoors, but vigilance is still recommended.
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 |
| Suzu | 3 | 4 | 7 | 9 | 10 | 10 | 11 | 11 | 9 | 6 | 4 | 3 |
| 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 |