Last updated: May 3, 2025
Understanding the UV Index in Susaki, Japan is crucial for protecting your skin and overall health. As a city situated in a Cfa climate zone, residents and visitors alike experience varying levels of UV radiation throughout the day, peaking at a maximum index of 12 around noon—indicating an extreme risk of harm from unprotected sun exposure. By being aware of UV levels, you can effectively prevent sunburn and reduce the long-term risks of skin damage. Given Susaki's typical climate and UV exposure risks, staying informed is key to enjoying the sun safely while embracing the beautiful outdoor lifestyle this region has to offer.
The UV Index presents a striking profile throughout the day, peaking dramatically from 11:00 AM to 12:00 PM with a maximum value of 12, indicating an intense level of solar radiation. Early risers will notice a more moderate ascent as the index starts at 2 at 07:00 AM, gradually climbing to 3 by 08:00 AM. The real intensity begins at 09:00 AM, surging to 6 before reaching a zenith of 11 by 11:00 AM. As the sun begins to dip post-noon, the index recedes to 9 at 02:00 PM, then gently descends to 6 by 03:00 PM, and continues its downward trend to settle at 0 by 07:00 PM. This data emphasizes the importance of sun protection during the peak hours when ultraviolet radiation is most potent.
| 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 | 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 |
Throughout the year, the UV Index demonstrates significant seasonal changes, notably peaking during the summer months. From January to February, UV exposure is moderate, but by March and April, the index escalates to very high levels, indicating a rapid increase in UV radiation. The period from May to August showcases the highest risk, classified as extreme, with a burn time of just 10 minutes—making these months particularly hazardous for skin exposure. As summer wanes into September and October, the UV levels remain very high, though they start to gradually decline. November and December see a return to moderate exposure levels. Visitors and residents are advised to take precautions especially during the high-risk months of May through August, such as wearing protective clothing, applying sunscreen regularly, and seeking shade during peak hours to minimize UV-related health risks.
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 |
| Susaki | 4 | 6 | 9 | 10 | 12 | 12 | 12 | 12 | 10 | 8 | 6 | 4 |