Last updated: July 2, 2025
In Fuji, Japan, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn, especially during the peak hours of sunlight. Understanding the UV levels—where they can reach a maximum of 12 around noon—empowers residents and visitors to take the necessary precautions to protect themselves from harmful UV radiation. With Fuji's Cfa climate zone offering generally warm summers and mild winters, the risks of UV exposure are not to be taken lightly. Whether you're enjoying outdoor activities near the iconic Mt. Fuji or simply soaking up the scenery, knowing the UV Index can help you safeguard your skin while enjoying the beauty of this stunning region.
The UV index today begins with a gentle rise, starting at a modest 2 at 7:00 AM. As the sun climbs higher, it reaches 5 by 8:00 AM, quickly escalating to a peak 12 by both 11:00 AM and 12:00 PM—indicating the highest intensity of UV radiation. From that point, the index starts to decline, dropping to 11 at 1:00 PM, and then gently easing down to 8 by 2:00 PM. The afternoon watches the UV levels further retreat to 6 at 3:00 PM, finally tapering off to a cool 1 by 5:00 PM, settling to 0 by 7:00 PM. It's a day where early sun seekers must take care, especially during the midday hours.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 2 | low | 45 min |
08:00 | 5 | moderate | 30 min |
09:00 | 8 | very high | 15 min |
10:00 | 10 | very high | 15 min |
11:00 | 12 | extreme | 10 min |
12:00 | 12 | extreme | 10 min |
13:00 | 11 | extreme | 10 min |
14:00 | 8 | very high | 15 min |
15:00 | 6 | high | 25 min |
16:00 | 3 | moderate | 30 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 demonstrates notable seasonal changes, with the most intense exposure occurring from April to August. During these months, the UV Index reaches extreme levels (10-12), significantly reducing the burn time to just 10 minutes. March and September also pose risks with very high levels (8-10), allowing for a burn time of only 15 minutes. Consequently, February and October present high levels (6-7), where protective measures are still advised with adjusted burn times of 25 minutes. Residents and visitors should exercise caution and protect their skin, especially during the high-risk months of April through August, by using sunscreen, wearing protective clothing, and limiting sun exposure during peak hours.
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 |
Fuji | 4 | 6 | 8 | 10 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 4 |
Osaka UVI | 4 | 6 | 8 | 11 | 11 | 11 | 12 | 11 | 10 | 7 | 5 | 3 |