Last updated: July 2, 2025
In Shingu, Japan, awareness of the UV Index is crucial for residents and visitors alike, especially as the region experiences a Cfa climate that can lead to heightened sun exposure. Understanding the UV levels throughout the day is essential for preventing sunburn and promoting long-term skin health. With midday UV Index values soaring to 12—indicating a very high risk of harm from unprotected sun exposure—it's vital to take precautions, particularly during the peak hours of 10 AM to 2 PM. Stay informed to enjoy the beautiful Japanese sunshine safely!
The UV Index paints a vivid picture of the sun's intensity throughout the day. Starting at 07:00, the index is a modest 2, gradually climbing to 4 by 08:00. The real heat kicks in by 09:00, reaching 7, and peaks at a blistering 12 by 12:00. This is the moment to slather on sunscreen and find shade, as the UV levels remain dangerously high at 11 until 13:00. As the afternoon progresses, the index begins to dip—falling to 9 by 14:00 and then to 6 at 15:00. By 16:00, it further decreases to 3, eventually winding down to a gentle 1 by 18:00 and 0 by 19:00. This data beautifully illustrates the importance of protecting your skin during the peak hours of UV radiation, especially between 10:00 and 14:00 when the sun is at its fiercest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | 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 |
During the year, the UV Index shows significant seasonal changes, peaking in the summer months. January and December have moderate UV levels (Index 4), with a burn time of 30 minutes. As spring approaches, February sees a rise to high levels (Index 6) and continues to climb sharply through March (Index 9), reaching April and May at extreme levels (Index 11). The highest UV readings occur in June and July (Index 12), accompanied by a burn time of just 10 minutes. As summer transitions to fall, the UV Index gradually decreases, with August still at extreme levels, followed by a slight drop in September (Index 10) and October and November returning to high levels (Index 6). It is crucial for residents and visitors to be particularly cautious during the high-risk months of April to August, taking protective measures such as wearing sunscreen, protective clothing, and seeking shade to minimize UV exposure.
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 |
| Shingu | 4 | 6 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 7 | 6 | 4 |