Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Tomakomai, Japan, particularly given its climate zone (Dfb), which features warm summers and cold winters. Awareness of UV levels plays a vital role in preventing sunburn and protecting skin health, especially during the peak hours when the UV Index is at its highest, reaching values of 8 between 10:00 AM and 12:00 PM. As you enjoy outdoor activities in this beautiful coastal city, it's essential to stay informed about local UV exposure risks and take necessary precautions to safeguard your skin against 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 shows significant seasonal variations that can impact residents and visitors. From January to February, the UV Index rises from 2 (low) to 3 (moderate), allowing for relatively safe sun exposure, with burn times increasing slightly from 45 to 30 minutes. As we move into March and April, the UV Index climbs to 5 (moderate) and 7 (high), respectively, necessitating increased sun protection as burn times decrease to 25 minutes. The peak high-risk months occur from May to September, with UV Index levels reaching 8 to 10 (very high) and burn times dropping to just 15 minutes. To stay safe during these months, it is crucial to apply sunscreen, wear protective clothing, and limit sun exposure, especially between 10 AM and 4 PM. Moving into October and November, the UV Index moderates again to 5 and 3, allowing for safer outdoor activities with burn times of 30 minutes before returning to low levels in December. Therefore, it is essential for all to remain vigilant about sun safety, particularly during the summer months when UV radiation is at its highest.
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 |
| Tomakomai | 2 | 3 | 5 | 7 | 8 | 10 | 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 |