Last updated: May 3, 2025
Understanding the UV Index in Asahimachi, Japan, is crucial for protecting your skin and overall health. With UV levels peaking at 8 during midday, awareness of these UV risks can help prevent sunburn and long-term skin damage. Asahimachi, nestled in a Dfb climate zone, experiences distinct seasonal variations that contribute to fluctuating UV exposure. By staying informed about the daily UV Index, residents and visitors alike can enjoy the outdoors safely while safeguarding their skin health from harmful rays.
The UV Index presents a compelling picture of solar intensity throughout the day. Early risers will notice a gentle start, with maximum values of 3 at 07:00. As the sun climbs higher, the index peaks at 8 between 10:00 and 12:00, indicating strong sun exposure. This is the best time to take precautions, such as applying sunscreen and wearing protective clothing. The intensity then gradually declines, dropping to 6 by 14:00 and tapering off further to 1 by 17:00. By evening, the UV Index hits 0 at 19:00, offering a safe reprieve as the day winds down. Remember, planning your outdoor activities around these insights can ensure you enjoy the sun while staying safe!
| 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 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | high | 25 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 seasonal variations, with the highest levels occurring during the summer months. From May to September, the UV Index rises to very high levels (8-9), indicating a critical period for sun exposure and skin protection, with a burn time of only 15 minutes. The high-risk months for UV exposure are May, June, July, and August, where residents and visitors should take extra precautions against sunburn and skin damage. In contrast, the winter months of January and December feature a low UV Index of 2, allowing for longer safe exposure times of 45 minutes. To protect your skin, it is advisable to wear sunscreen, hats, and protective clothing, especially during the peak hours between 10 AM and 4 PM, particularly in the high-risk months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Asahimachi | 2 | 3 | 6 | 7 | 8 | 9 | 9 | 9 | 8 | 5 | 3 | 2 |
| 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 |