Last updated: May 3, 2025
In Rishiri Town, Japan, awareness of the UV Index is crucial for safeguarding your skin health and preventing sunburn. Understanding UV levels empowers residents and visitors alike to take proactive measures against the sun’s harmful rays, especially during peak hours when the index reaches values of 8 at noon. Nestled within a Dfb climate zone, Rishiri experiences unique weather patterns that can lead to varied UV exposure risks. Let’s explore how this vital information can help you enjoy the sun safely while embracing all that this picturesque locale has to offer.
The UV Index rises steadily throughout the morning, peaking at 8 between 11:00 AM and 12:00 PM, making this the most critical time for sun exposure. Starting from a moderate level of 2 at 7:00 AM, it increases to a manageable 4 by 8:00 AM before jumping to 6 at 9:00 AM. As the clock hits 10:00 AM, it reaches 7, urging caution for those outdoors. Post-peak, the index declines gradually, dipping to 5 at 2:00 PM and continuing its descent to 1 by 5:00 PM. The day wraps up with a UV Index of 0 by 7:00 PM, highlighting the diminishing sun's influence in the evening. Remember to protect your skin during the peak hours!
| 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 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | 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, the UV Index experiences significant fluctuations, indicating varying levels of sun exposure risk. The months with the highest UV Index values—May through August—are categorized as very high, with an alarming burn time of just 15 minutes, highlighting the critical need for sun protection. April also sees a high risk with a UV Index of 6, while September drops to high but still requires caution with a burn time of 25 minutes. From October to February, the risk significantly diminishes, with January and December marked by a low exposure category. To stay safe, residents and visitors should prioritize sun protection—such as sunscreen, hats, and protective clothing—especially during the high-risk months from April to September.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rishiri Town | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 9 | 7 | 5 | 3 | 1 |
| 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 |