Last updated: June 2, 2025
In the picturesque town of Muikamachi, Japan, staying informed about the UV Index is crucial for protecting your skin and overall health. Understanding UV levels not only helps in preventing painful sunburns but also plays a vital role in long-term skin health. Characterized by a Cfa climate, Muikamachi experiences specific UV exposure challenges, especially during peak hours from 10 AM to 1 PM when the UV Index can soar to 11—the extreme category, indicating a high risk for harm from unprotected sun exposure. By being aware of these levels, residents and visitors alike can take proactive steps to enjoy the great outdoors safely.
The UV Index reveals a striking pattern of sun exposure throughout the day. Starting at 7:00 AM, the index is a modest 2, but as the sun climbs higher, it reaches its peak intensity at 11:00 AM and 12:00 PM with a soaring 11—a clear signal to seek shade! By 1:00 PM, it dips slightly to 10, yet remains in the high-risk zone until 2:00 PM when it begins to wane to 8. The afternoon continues its descent, hitting 5 at 3:00 PM, before falling to a much safer 1 by 5:00 PM. By 7:00 PM, the UV Index plummets to 0, ushering in a welcome reprieve from the sun. If you’re planning outdoor activities, the early hours are best avoided, especially around midday when the UV exposure is at its peak!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 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, UV Index values fluctuate significantly, indicating varying levels of sun exposure risk. The high-risk months for UV exposure occur from March to August, peaking during the summer months of June, July, and August with an extreme UV Index of 11 and a burn time as short as 10 minutes. Visitors and residents are strongly advised to take preventive measures during these months, such as wearing sunscreen with high SPF, protective clothing, and seeking shade whenever possible. As the year progresses, the UV Index decreases to a moderate level by November and December, allowing for safer outdoor activities, but caution is still essential, especially in early spring and late summer when burn times can still be relatively short. Remember to stay vigilant and protect your skin from harmful UV rays!
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 |
| Muikamachi | 4 | 5 | 8 | 9 | 10 | 11 | 11 | 11 | 9 | 7 | 5 | 3 |
| 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 |