Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Saito, Japan, where the combination of a humid continental climate and high summer sun can pose significant risks to skin health. With UV levels peaking at an intense 12 around noon, awareness of these values is key to preventing sunburn and long-term skin damage. By tracking the UV Index throughout the day, you can make informed decisions about outdoor activities, ensuring you stay protected while enjoying everything this vibrant city has to offer. Stay vigilant and prioritize safe sun practices to safeguard your skin under Saito's sunny skies!
As the sun rises, the UV Index steadily climbs, peaking at 12 around noon, indicating a high risk of harm from unprotected sun exposure. From 07:00 with a low index of 2, it swiftly escalates to 11 by 11:00. The intensity continues with 12 during 12:00, urging everyone to take protective measures. After this zenith, the UV Index begins to decline, falling to 9 at 14:00, and tapering off to a gentle 1 by 18:00, where daylight gives way to twilight. Stay safe and enjoy the sun wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do the UV index levels, significantly affecting sun exposure and safety. Throughout the year, high-risk months generally occur from March to September, where the UV index peaks at 12, classified as extreme exposure, particularly during May through August. During these months, burn time is as short as 10 minutes, necessitating vigilant sun protection measures. Visitors and residents are urged to use sunscreen, wear protective clothing, and seek shade during peak hours to mitigate the risk of skin damage. In contrast, the UV index is lower in January, February, October, and November, where exposure is categorized as moderate to high; however, sunscreen remains advisable during all months to ensure skin health year-round.
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 |
| 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 |
| Saito | 5 | 6 | 9 | 10 | 12 | 12 | 12 | 12 | 11 | 8 | 6 | 4 |