Last updated: June 2, 2025
In Ogawa, Japan, being aware of the UV Index is crucial for protecting yourself against harmful sun exposure. With UV levels soaring to a maximum of 11 during peak hours, understanding these measurements can be key to preventing sunburn and maintaining skin health. Nestled in a humid subtropical climate (Cfa), Ogawa experiences significant UV risks, particularly between 10 a.m. and 1 p.m., when your skin may be at its most vulnerable. Stay informed and protect yourself to enjoy the sunshine safely!
As the sun rises, the UV Index begins its ascent, starting at a modest 2 at 7:00 AM. By 8:00 AM, it surges to 5, signaling the onset of midday sun exposure. The intensity peaks at 11 from 11:00 AM to 12:00 PM, making these hours crucial for sun protection. As the afternoon progresses, the index gradually declines, dipping to 9 at 1:00 PM, and then further to 7 by 2:00 PM. By late afternoon, at 5:00 PM, the UV Index drops to 5, and eventually settles at a low of 1 by 6:00 PM. Finally, as the sun sets, the UV Index returns to 0 by 7:00 PM. It's clear that during the peak hours of 11 AM to 12 PM, protective measures are highly recommended for safety under the sun.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 2 | low | 45 min |
08:00 | 5 | moderate | 30 min |
09:00 | 7 | high | 25 min |
10:00 | 9 | very high | 15 min |
11:00 | 11 | extreme | 10 min |
12:00 | 11 | extreme | 10 min |
13:00 | 9 | very high | 15 min |
14:00 | 7 | high | 25 min |
15:00 | 5 | moderate | 30 min |
16:00 | 3 | moderate | 30 min |
17:00 | 1 | low | 45 min |
18:00 | 1 | low | 45 min |
19:00 | 0 | low | 45 min |
Throughout the year, UV exposure varies significantly, necessitating careful planning for both visitors and residents. The high-risk months for UV radiation are from March to August, with the UV Index peaking at an extreme level of 11 during May, June, July, and August, where the recommended burn time is just 10 minutes. In contrast, January, November, and December present a moderate UV Index of 3 to 5, allowing for longer exposure times of 30 minutes. To ensure safety, it is crucial to wear sunscreen, protective clothing, and sunglasses during the high-risk months, and to seek shade whenever possible to minimize skin damage from excessive UV radiation.
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 |
Ogawa | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 9 | 7 | 5 | 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 |