Last updated: May 3, 2025
Understanding the UV Index in Kurihara, Japan is essential for protecting your skin and preventing sunburn, especially during the warmest months when sun exposure can be at its peak. With the region's Cfa climate, residents and visitors should be mindful of the ozone layer's natural variations throughout the day, as the UV levels can rise sharply, reaching a maximum of 9 between 11:00 AM and 1:00 PM. By keeping an eye on the UV Index, you can make informed decisions about sun protection, ensuring your skin stays healthy and safe from harmful rays while enjoying the beautiful outdoors that Kurihara has to offer.
The UV Index data for the day reveals a dynamic fluctuation in sun intensity. Starting at 7:00 AM with a mild value of 2, the UV Index climbs steadily, peaking at 11:00 AM and 12:00 PM with a high of 9—a clear indication that sun protection is crucial during these hours. As the afternoon progresses, a gradual decline begins; by 4:00 PM, the index drops to 2, followed by even lower numbers in the evening—1 at 5:00 PM and 0 by 7:00 PM. This data underscores the importance of being sun-smart during peak hours, especially between 10:00 AM and 2:00 PM when UV exposure is at its most potent.
| 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 | 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 |
As the year progresses, the UV Index in our region exhibits significant fluctuations, reflecting seasonal changes that are essential for visitors and residents to note. During the winter months of January and February, the UV Index remains in the moderate range (3-4), allowing for a burn time of about 30 minutes. However, as spring approaches, particularly in March, the UV Index rises sharply to high (7), reducing burn time to 25 minutes. The months of April through August present the highest risk, with UV Index values reaching very high (8-9) in April and May, escalating to a peak of extreme (11) in July and August, where the burn time drops to just 10 minutes. By September, there’s a slight decline to very high (9), and it further reduces in the fall months, with the index returning to the moderate range by November and December. Residents and visitors should take care during high-risk months—particularly from March through September—by seeking shade, wearing protective clothing, and using sunscreen to safeguard against harmful UV exposure.
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 |
| Kurihara | 3 | 4 | 7 | 8 | 9 | 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 |