Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Arita, Japan, where sunny days can lead to significant UV exposure risks, especially during peak hours. The UV levels in Arita often reach their highest from late morning to early afternoon, with a maximum reading of 11 around noon, which poses a serious threat for sunburn and long-term skin health. In this Cfa climate zone, where summers are warm and humid, being aware of and respecting the UV Index can help you take necessary precautions to protect your skin and enjoy the beautiful outdoor scenery safely. Stay informed and shield yourself from harmful rays to ensure a healthier, happier time in Arita!
The UV Index today follows a dynamic trajectory, peaking dramatically as the sun climbs. Starting at a modest 1 at 07:00, it rises to 3 by 08:00 and then continues its ascent, reaching 5 by 09:00. The intensity escalates further, peaking at an impressive 11 at 12:00—a time when sun protection is crucial. As the afternoon wears on, the index moderately descends, dropping to 10 by 13:00 and gradually decreasing to 6 at 15:00. By 16:00, it falls to 4, before tapering off to 1 by 18:00 and remaining constant until 19:00. This hourly breakdown highlights the importance of being sun-smart during peak hours, especially when the index is at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | 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 |
The UV Index experiences significant fluctuations throughout the year, with the highest levels occurring from May to September, where it peaks at an extreme level of 12 in both July and August. This period marks the high-risk months for sun exposure, with a critical burn time of just 10 minutes. Conversely, the UV levels are more moderate in January and December, with a UV Index of 4 and a longer burn time of 30 minutes. Residents and visitors are advised to take proactive sun safety measures, particularly during the spring and summer months, including wearing sunscreen, protective clothing, and seeking shade during peak hours when the UV Index is highest.
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 |
| Arita | 4 | 6 | 8 | 10 | 11 | 11 | 12 | 12 | 11 | 7 | 6 | 4 |