Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Tomiya, Japan, where the subtropical climate can lead to significant sun exposure. With UV levels peaking around 10 AM to 1 PM—reaching a high of 9—being aware of these fluctuations is vital for sunburn prevention and maintaining healthy skin. As you enjoy the beautiful outdoor attractions that Tomiya offers, keeping an eye on the UV Index can help you mitigate risks associated with overexposure, ensuring that your time under the sun remains safe and enjoyable. Remember, while soaking in the sun’s warmth, being informed empowers you to protect your skin effectively!
The UV Index throughout the day showcases a fascinating peak and decline in solar intensity. Starting gently at 2 by 07:00, the intensity rapidly escalates, hitting 4 by 08:00. As the sun climbs higher, it reaches its zenith with a striking 9 at 10:00 and stays steady until noon. The afternoon brings a slight drop, with the index falling to 8 by 13:00, then tapering off to 6 at 14:00. As the day transitions into evening, the levels diminish further, ending at a mere 0 by 19:00. This captivating arc of UV exposure emphasizes the importance of sun protection, particularly during those peak hours when the index is at its highest. 🌞
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 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 |
As the seasons change, so does the UV Index, impacting both visitors and residents. From January to February, the UV Index remains at a moderate level (3-4), allowing for 30 minutes of sun exposure without significant risk. However, as spring approaches in March, the index climbs to high (7), reducing safe exposure to 25 minutes. The peak UV Index occurs during summer months, notably in July and August, where it reaches an extreme level (11) with a mere 10 minutes of safe exposure. September sees a decline to very high (9), while October returns to high (6) conditions, each allowing for a bit more time in the sun—25 minutes and 15 minutes respectively. From November to December, the UV risks lower again to moderate (3-4), allowing for 30 minutes. Visitors and residents should be especially cautious from March through September, particularly during peak summer months, by applying sunscreen, wearing protective clothing, and limiting sun exposure to mitigate the risk of UV-related health issues.
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 |
| Tomiya | 3 | 4 | 7 | 8 | 10 | 10 | 11 | 11 | 9 | 6 | 4 | 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 |