Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Kapaau, United States, as it serves as a vital tool for managing sun safety and protecting skin health. With the sun reaching its peak intensity around midday, a strong UV Index, peaking at 13 between noon and 1 PM, highlights the necessity for vigilance against sunburn and long-term skin damage. Given Kapaau’s tropical climate, where sunny days are the norm, being informed about UV levels can help everyone enjoy the outdoors safely while minimizing the risks of overexposure. Stay aware and stay protected!
At dawn, the UV Index starts gently, peaking at 1 by 7:00 AM. As the sun rises higher, the intensity increases sharply, reaching 3 by 8:00 AM and climbing to an impressive 9 by 10:00 AM. The day reaches its zenith of sun exposure at 13 around noon and remains at this level until 1:00 PM. After that, the UV Index begins to decline, with a noticeable drop to 7 by 3:00 PM, and then further to 2 by 5:00 PM. As evening approaches, the UV Index gently fades to 1 by 6:00 PM, and finally returns to 0 by 7:00 PM. Remember to take precautions during the peak hours, especially between 11:00 AM and 1:00 PM, when UV levels are at their highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with January and December marking the lower range at 8, indicating a very high exposure category and a burn time of 15 minutes. As we transition to February, the index climbs to 10, remaining in the very high category. March to September sees the peak, with values reaching 13 in the summer months of June, July, and August, all categorized as extreme with a minimal burn time of just 10 minutes. October slightly decreases to 11, before returning to 9 in November. For anyone visiting or residing in the area, it is crucial to take protective measures during the spring and summer months, particularly from March to September, where sun exposure is most dangerous. Wearing sunscreen, protective clothing, and seeking shade during peak hours are highly recommended to mitigate the risks of UV-related harm.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chicago UVI | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Brooklyn UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| New York City UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| Los Angeles UVI | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
| Kapaau | 8 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 11 | 9 | 8 |