Last updated: May 3, 2025
In Horonobe, Japan, staying informed about the UV Index is crucial for protecting your skin from harmful ultraviolet radiation. Understanding UV levels can help you prevent sunburn and maintain long-term skin health, especially in a climate like Horonobe's, characterized by its Dfb classification, which brings varied seasonal exposure. With UV Index values peaking at 8 during midday hours, it's essential to be aware of the risks associated with sun exposure and to take necessary precautions to enjoy the beautiful outdoors safely.
The UV Index analysis reveals a striking pattern throughout the day. Starting at 07:00 with a manageable level of 3, the intensity of ultraviolet radiation escalates, peaking at 11:00 and 12:00, where it reaches a high of 8. After this midday zenith, the UV Index begins to decline, dropping to 7 by 13:00 and gradually tapering off to 4 at both 14:00 and 15:00. By the late afternoon, it dwindles further to 2 at 16:00, before settling to a safe 1 by 17:00 and 18:00, ultimately reaching 0 by 19:00. This data underscores the importance of sun protection during the peak hours, especially between 10:00 and 14:00, when UV exposure can be most harmful.
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 | 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 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Horonobe | 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 |