Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors in Hutami, Japan, especially given the region's Cfa climate, which can lead to significant sun exposure. With UV levels peaking around midday at a staggering 13, being aware of these fluctuations is essential for sunburn prevention and long-term skin health. By grasping the implications of the UV Index, you can better protect yourself and your loved ones from harmful rays that can cause skin damage. As the warm sun shines brightly, typically between 8:00 AM and 2:00 PM, understanding these risks becomes all the more pertinent. Whether you're heading out for a casual stroll or engaging in outdoor activities, keeping an eye on Hutami's UV Index can make all the difference in enjoying the great outdoors safely.
As the sun rises, the UV Index starts off at a moderate 3 at 07:00, making it a safe time for early risers. By 08:00, it climbs to 5, and shortly thereafter, at 09:00, it peaks at a striking 8. The sun reaches its zenith around 10:00, boasting a maximum intensity of 11, which calls for caution among sun-seekers. The intensity doesn't let up, maintaining a high of 13 by 11:00 and 12:00. As the afternoon progresses, the index begins to taper off, dropping to 11 at 13:00 and descending to 8 at 14:00. By 15:00, it dips further to 5, creating a more comfortable environment for outdoor activities. However, as the evening approaches, the UV levels drop significantly to 2 by 16:00, and then to a mere 1 by 17:00 and 18:00, before finally resting at 0 by 19:00. This data illustrates a clear pattern of rising and falling UV intensity, emphasizing the importance of protecting your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 8 | very high | 15 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 2 | low | 45 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 spring and summer months. Notably, March through September experience extreme UV levels, with indices consistently reaching 12 or higher, indicating a high risk for sunburn. In particular, April to July holds the highest UV ratings, making these months crucial for sun protection. High-risk months include February to October, with a sharp increase from February's very high index of 9 to April's extreme index of 13. Residents and visitors should be particularly vigilant in these months, limiting sun exposure between 10 AM and 4 PM and utilizing sunscreen, protective clothing, and sunglasses to mitigate UV damage effectively. As UV levels decrease in November and December, while still cautioning against exposure, the risk diminishes significantly.
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 |
| Hutami | 7 | 9 | 11 | 13 | 12 | 13 | 13 | 12 | 12 | 10 | 8 | 6 |