Last updated: May 3, 2025
Understanding the UV Index in Matsusaka, Japan is crucial for protecting your skin from harmful UV radiation and preventing sunburn. As a city in a humid subtropical climate (Cfa), Matsusaka experiences varying levels of UV exposure throughout the day, peaking at a high of 11 between 11:00 AM and 12:00 PM. Being aware of these levels allows residents and visitors alike to take necessary precautions, ensuring skin health and overall well-being. With the sun's intensity significantly increasing during the summer months, staying informed about the UV Index not only helps in avoiding immediate discomfort but also plays a vital role in long-term skin care.
The UV Index throughout the day reveals a dramatic rise in sun intensity, peaking during the late morning to early afternoon. Starting the day at a modest 2 at 7:00 AM, the index climbs steadily, reaching 11 by 11:00 AM and maintaining that level until 1:00 PM. This signifies a high risk of harm from unprotected sun exposure. Following this peak, the index begins to dip, dropping to 8 by 2:00 PM, and continuing its decline until it falls to 0 by 7:00 PM. With this information, it's crucial to take sun safety precautions—especially during the hours when the UV Index is at its highest!
| 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 | 9 | 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 | 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 index values show significant seasonal changes, with the highest risk months occurring from April to August, when the UV index reaches extreme levels of 11 to 12. This period, particularly in July, presents the shortest burn time of just 10 minutes, indicating the need for serious sun protection. As spring approaches in March, the index rises to a very high level of 8, making it essential for residents and visitors to start incorporating sun safety measures early. As we transition into the fall and winter months, the UV index drops, with February and October still posing moderate to high risk, while January and December return to a more moderate level. To ensure safety during peak UV times, it's crucial to apply sunscreen liberally, wear protective clothing, and seek shade whenever spending extended periods outdoors.
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 |
| Matsusaka | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 6 | 4 |