Last updated: July 2, 2025
Understanding the UV Index in Toyotomi, Japan is essential for safeguarding your skin and overall health. With its Dfb climate, characterized by warm summers, residents and visitors alike must stay informed about ultraviolet (UV) radiation levels to effectively prevent sunburn and long-term skin damage. During peak hours, particularly around 11:00 and 12:00, the UV Index can reach a critical 9, indicating a high risk of harm from unprotected sun exposure. By monitoring these levels, you can enjoy the beautiful outdoor activities that Toyotomi offers while prioritizing your health and well-being.
The UV Index today shows a dynamic journey through the hours, peaking impressively at 9 between 11:00 AM and 12:00 PM, signaling a high level of sun exposure. Starting the day at 3 at 07:00 AM, it steadily climbs to 6 by 09:00 AM and reaches its zenith at 10:00 AM with an 8. As the sun moves across the sky, it maintains a strong presence, remaining at 9 during the late morning before gradually descending to 4 by 03:00 PM. The decline continues into the late afternoon, dropping to 1 by 17:00 PM until sunset. It's essential to take precautions during the peak hours to protect your skin from harmful UV radiation!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Toyotomi | 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 |