Last updated: May 3, 2025
In Hachinohe, Japan, being aware of the UV Index is crucial for protecting your skin and maintaining overall health. Understanding UV levels helps in preventing sunburn and long-term skin damage, especially during the peak hours when UV levels are highest. Hachinohe experiences a Dfb climate, which can lead to significant UV exposure; with midday indices reaching up to 9, it's essential to stay informed to safeguard your skin from harmful rays. Regularly checking the UV Index can empower residents and visitors alike to enjoy the sun safely while minimizing health risks.
As the sun rises, the UV Index gradually increases, starting at a mild 3 around 07:00. By 08:00, it reaches 4, indicating a moderate risk of harm from unprotected sun exposure. The intensity peaks at 09:00 with a 6, then skyrockets to an impressive 8 by 10:00. The sun hits its zenith at 11:00 and 12:00, both boasting a maximum of 9, presenting a high risk for those outdoors. As the afternoon progresses, the UV Index begins to decline, gently falling to 6 by 14:00, and continuing downward to 4 at 15:00. By 16:00, it drops further to 2, and as the day winds down, the index settles at a minimal 1 by 17:00 and remains low until 19:00, when it finally hits 0. It’s essential to stay sun smart, especially during those peak hours when the UV Index is at its highest!
| 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 | 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 |
Throughout the year, UV radiation levels experience significant seasonal variation, peaking during the summer months. January and December have a low UV Index of 2, allowing for an extended burn time of 45 minutes. However, as early as February, the UV Index rises to 3 (moderate), reducing the burn time to 30 minutes. March introduces a high risk with a UV Index of 6, and by April and May, it escalates to 8 and 9 respectively, both categorized as very high, with a critical burn time of just 15 minutes. The peak occurs in August, where the UV Index reaches an extreme level of 11, permitting only 10 minutes of exposure before risking sunburn. As we transition into fall, the UV levels moderate slightly, but September remains high at 9, before dropping back to a high index of 6 in October. As a precaution, visitors and residents should prioritize sun protection from March through September, particularly during the summer months when the risk of harm is greatest, and always use sunscreen, wear protective clothing, and seek shade 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 |
| Hachinohe | 2 | 3 | 6 | 8 | 9 | 10 | 10 | 11 | 9 | 6 | 4 | 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 |