Last updated: July 2, 2025
Staying informed about the UV Index is vital for residents and visitors of Hanama'ulu, United States, where the tropical climate can lead to significant sun exposure. Understanding UV levels is crucial for effective sunburn prevention and maintaining long-term skin health, especially as the UV Index can reach dangerous levels throughout the day. With peak values soaring to 12 at noon and consistently high readings in the late morning and early afternoon, it's essential to be cautious and proactive when enjoying outdoor activities in Hanama'ulu's sunny environment. Protecting your skin is not just a seasonal concern—it's a year-round necessity in this beautiful coastal paradise.
The UV Index data reveals a compelling daily pattern in sun exposure. Starting at 7:00 AM, the index is a mere 1, indicating minimal risk, but as the sun rises, it quickly escalates, reaching 5 by 9:00 AM. The intensity peaks dramatically at 12:00 PM, where it hits an exhilarating 12, suggesting a high risk of harm from unprotected sun exposure. The apex arrives at 1:00 PM, with a UV Index of 13, ensuring that sun safety is a priority during this period. As the afternoon progresses, the index declines, tapering to 8 at 3:00 PM and settling back down to 1 by 7:00 PM. This data underscores the importance of sun protection strategies during the midday hours when the sun's rays are most potent.
| 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 | 10 | very high | 15 min |
| 12:00 | 12 | 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 |
Throughout the year, UV levels exhibit significant seasonal changes, peaking during the warmer months. From January to December, the UV Index rises dramatically, reaching an extreme level of 13 from May to August, making these high-risk months for sun exposure. During this period, the recommended burn time drops to just 10 minutes, indicating the urgent need for protection such as sunscreen and clothing. February and March also present heightened danger, categorized as very high and extreme, respectively, where the burn time sharply decreases. As the year progresses towards October and November, the UV Index begins to decline, but still remains very high at 10 and 8, allowing for burn times of only 15 minutes. Visitors and residents are advised to exercise caution and take preventative measures, particularly from February through September, to mitigate the risks associated with high UV exposure.
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 |
| Hanama'ulu | 7 | 10 | 11 | 11 | 13 | 12 | 13 | 13 | 12 | 10 | 8 | 7 |