Last updated: May 3, 2025
Understanding the UV Index in Imabari-shi, Japan is crucial for protecting your skin and overall health. With sunny summers and a humid subtropical climate, Imabari-shi experiences varying UV levels throughout the day, reaching a peak UV Index of 11 around midday. This means that awareness of UV levels is vital for preventing sunburn and reducing long-term skin damage. By grasping the intensity of UV radiation and its impact on your health, you can better safeguard yourself and enjoy the beautiful Japanese outdoors while minimizing risks associated with high UV exposure.
At dawn, the UV Index starts off gently at 2 by 7:00 AM, gradually rising as the sun climbs higher in the sky. By 09:00 AM, it reaches a moderate 6, but the real intensity hits at 11:00 AM and 12:00 PM, peaking at 11—a stark reminder to stay protected from the sun's rays. As the afternoon rolls on, the index begins to taper off, dropping to 8 at 2:00 PM, then declining further to 6 by 3:00 PM. As the day winds down, the UV Index falls to a safe 1 by 6:00 PM, signaling a welcome reprieve from the sun's powerful influence. Always remember to take precautions during those peak hours!
| 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 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | 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 |
The UV Index experiences significant seasonal fluctuations, peaking between May and August, where an extreme rating of 11 to 12 indicates a burn time of just 10 minutes. March and April also see heightened levels, categorized as very high with a burn time of 15 minutes. Conversely, the UV Index is at its lowest during January, February, and December, marked as moderate, allowing for a safer 30-minute exposure before risking sunburn. The highest-risk months for UV exposure are May to August, necessitating strong sun protection measures for visitors and residents alike. It is essential to wear sunscreen, protective clothing, and sunglasses, especially during peak hours, to minimize 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 |
| 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 |
| Imabari-shi | 4 | 5 | 8 | 10 | 11 | 11 | 12 | 12 | 10 | 7 | 6 | 4 |