Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Marine Corps Base Hawaii (MCBH). With Hawaii’s sun-soaked climate, awareness of UV levels is essential for preventing sunburn and promoting long-term skin health. The UV Index typically peaks at midday with levels soaring to 12, indicating extreme risk for harm from unprotected sun exposure. By familiarizing yourself with these levels, you can take proactive measures against harmful rays, ensuring your time in this beautiful military base is both enjoyable and safe. Stay informed and protect your skin under the vibrant Hawaiian sun!
The UV Index throughout the day showcases a dynamic dance of sun intensity. Starting at a mild 1 at 07:00, the index gradually rises, hitting 3 by 08:00. As the morning progresses, it peaks at a striking 12 between 12:00 and 13:00, indicating the strongest sun exposure—perfect for a beach day but not without caution! By 15:00, the UV levels begin to retreat, dropping to 7, and continue to fall, reaching 2 by 17:00. As the sun sets, the index dwindles further to 0 by 19:00, signifying a gentle end to the day. Remember to stay protected during those peak hours!
| 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 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 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 |
During the year, the UV Index exhibits significant seasonal fluctuations, peaking in the summer months. February through October marks a period of high to extreme UV levels, with particularly high risk from March to September, when the Index reaches as high as 13. Visitors and residents should be especially cautious during these months, as the burn time drops to just 10 minutes under extreme conditions. In contrast, January and December offer relatively safer exposure levels, with a UV Index of 7. To minimize the risk of UV-related damage, it is crucial for individuals to wear protective clothing, apply sunscreen, and limit sun exposure during the high-risk months, particularly between midday and early afternoon when the sun's rays are strongest.
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 |
| Marine Corps Base Hawaii - MCBH | 7 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 11 | 8 | 7 |