Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Wailuku, where the warm climate can lead to heightened sun exposure throughout the day. With UV levels that peak at 13 around midday, it’s essential to stay informed to prevent sunburn and protect your skin health. The typical weather in Wailuku means that awareness of UV exposure risks is not just beneficial but necessary, ensuring that everyone can enjoy the beautiful Hawaiian sun while minimizing harmful effects. Stay smart, stay safe, and let the UV Index guide your sun safety practices!
The UV Index paints a vivid picture of the sun's intensity throughout the day. Starting from a modest 1 at 7:00 AM, the UV Index gradually rises, reaching a peak of 13 by noon and early afternoon. At 10:00 AM, it escalates to 8, showcasing the growing strength of the sun's rays. By 11:00 AM, it hits 11, signaling a time to seek shade or lather on sunscreen. As the afternoon unfolds, the values begin to decline, dropping to 8 at 3:00 PM, then further to 4 by 4:00 PM. The day winds down with a gentle 2 at 5:00 PM, before tapering off to a safe 0 by 7:00 PM. Remember, while basking in the sun can be delightful, knowing when the UV Index peaks is vital for your skin's health!
| 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 | 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 | 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 |