Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Wailuku, United States. High UV levels can lead to sunburn and long-term skin damage, making it essential to stay informed about daily UV risks. With a typical tropical climate that exposes individuals to increased UV radiation, especially between 10 AM and 2 PM, knowing when to seek shade or apply sunscreen can significantly enhance your skin health. During peak hours, Wailuku often sees UV Index readings soaring to 12, signaling the need for vigilance against harmful sun exposure. Stay proactive and protect yourself from the sun's rays while enjoying the beautiful outdoor scenery!
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 |
Throughout the year, UV exposure varies significantly, with the highest levels occurring from March to September, where the UV Index peaks at 13 during the summer months. Specifically, February through October are identified as high-risk months, showcasing very high to extreme UV levels that necessitate caution. With a minimal burn time of 10 minutes during the peak months of April through September, it is crucial for visitors and residents to take protective measures, such as wearing sunscreen, protective clothing, and sunglasses, especially when outside during midday hours. As the season transitions, November and December still present very high UV levels (Index 8), emphasizing the need for continued vigilance despite cooler temperatures. Always regard the UV Index and prioritize skin protection to prevent sun damage year-round.
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 |
| Wailuku | 7 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 11 | 8 | 8 |