Last updated: June 2, 2025
In Uekimachi-mono, Japan, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding the daily fluctuations in UV levels empowers residents and visitors alike to take appropriate precautions during the sunniest hours, particularly between 10 AM and 2 PM when the index peaks at a high of 11. With a Cfa climate, characterized by warm summers and ample sunshine, Uekimachi-mono presents unique challenges regarding UV exposure risk. By staying informed about the UV Index, you can enjoy the beautiful weather while protecting your skin from potential harm.
The UV Index reveals a dynamic sunlight profile throughout the day, peaking sharply at 11:00 AM, where it reaches a striking 11. As the sun rises, UV levels gradually climb from 2 at 7:00 AM to 3 by 8:00 AM, then making a significant leap to 6 by 9:00 AM. The intensity continues to escalate, hitting 8 by 10:00 AM, and remains relentlessly high at 11 from 11:00 AM to 1:00 PM. Following this peak, the UV Index begins to decline, dropping to 9 at 2:00 PM and subsequently to 7 at 3:00 PM. As the day winds down, UV exposure becomes milder, with values of 4, 2, 1, and ultimately settling at 1 by 7:00 PM. This data underscores the critical hours for sun safety, emphasizing the need for protective measures during the peak UV times.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | 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 |
Throughout the year, the UV Index exhibits significant seasonal variations, with spring and summer months posing the highest risk of UV exposure. From March to September, the index reaches very high to extreme levels—particularly during April to August, where it peaks at 12 in July and August. During these months, the burn time shortens dramatically to just 10 minutes, indicating a critical need for sun protection. Conversely, January and December record the lowest UV levels with a moderate exposure category, allowing for more extended exposure times of 30 minutes. Visitors and residents are advised to take precautions, especially from March to September, by wearing protective clothing, applying sunscreen, and seeking shade during peak hours to minimize the risks associated with high 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 |
| Uekimachi-mono | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 12 | 11 | 8 | 6 | 4 |