Last updated: July 2, 2025
In Susaki, Japan, staying aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels helps residents and visitors alike avoid sunburn and reduce long-term skin health risks, particularly as Japan's climate features significant variations in sunlight exposure. With a Cfa climate, Susaki experiences high UV levels, peaking around noon with an index of 12, making it essential to plan outdoor activities wisely and take protective measures during peak hours. Stay informed and safeguard your skin while enjoying the beautiful outdoors!
The UV Index data reveals a notable progression in sun exposure throughout the day. Starting at a modest 2 at 7:00 AM, it quickly escalates, peaking at a striking 12 by noon, indicating a high risk for harm from unprotected sun exposure. As the afternoon unfolds, the index gradually recedes, dropping to 9 at 2:00 PM and further decreasing to 1 by 7:00 PM. This pattern suggests that the sun’s intensity is at its most dangerous during the late morning and early afternoon, emphasizing the importance of sunscreen and protective measures during these critical hours. Stay safe under the sun!
| 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 | 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 | 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 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 |