Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Nanakuli, where the sun's rays can pose a significant risk to skin health throughout the year. With peak UV levels often reaching dangerous highs—up to 13 during midday—the potential for sunburn and long-term skin damage is a serious concern. Being aware of the daily UV levels empowers you to take necessary precautions, such as applying sunscreen or seeking shade, ensuring you and your loved ones remain protected under the Hawaiian sun. With its warm climate, Nanakuli's outdoor lifestyle amplifies the importance of understanding UV exposure; stay informed to enjoy all that our beautiful environment offers, safely.
The UV Index during the day reveals a notable peak in sun exposure. Starting at 07:00 with a gentle 1, it gradually climbs to 2 by 08:00. As the sun rises higher, the index surges dramatically, hitting 5 at 09:00, and reaching a striking 8 by 10:00. The intensity peaks at 12:00 with a scorching 13, remaining high until 13:00. After that, it starts to decline, returning to 11 at 14:00 and falling to 8 by 15:00. As the afternoon wanes, the index drops to 5 at 16:00, and finally settles back to 1 by 18:00 and 19:00. This data highlights the importance of sun safety measures during the midday hours when UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | 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 | 8 | very high | 15 min |
| 16:00 | 5 | 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 fluctuations throughout the year, with the highest levels typically occurring from March to October. During March to September, the index peaks, often reaching 12 or higher, categorizing these months as extreme exposure months, where burn time is as low as 10 minutes. Notably, July and August are the most critical months, with a UV Index of 13. To protect against harmful UV exposure, visitors and residents should take precautions such as wearing sunscreen, protective clothing, and sunglasses, especially during these high-risk months. As the year transitions to late fall and winter, UV levels decrease, with November and December presenting a lower risk, although caution is still advised with indexes of 8 and 7, respectively. Stay informed and protect your skin to enjoy outdoor activities safely!
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 |
| Nanakuli | 8 | 10 | 11 | 12 | 12 | 12 | 13 | 13 | 12 | 11 | 8 | 7 |