Last updated: July 2, 2025
Understanding the UV Index is crucial for the residents of Asan-Maina Village, Guam, where the tropical climate intensifies sunlight exposure throughout the day. With UV levels soaring to a maximum of 14 at midday, awareness of these levels is essential for promoting sunburn prevention and maintaining overall skin health. During peak hours, particularly between 10 AM and 1 PM, the risk of harmful effects from UV radiation increases significantly, making it vital for villagers and visitors alike to stay informed and take protective measures. By tracking the UV Index, you can enjoy the beautiful outdoors of Asan-Maina Village while safeguarding your wellbeing against unnecessary sun damage.
The UV Index for the day presents a dynamic shift in sun exposure, climbing steadily from a safe 1 at 07:00 to an impressive peak of 14 at 12:00. As the sun rises, so does the intensity of its rays, reaching a notable 12 at 11:00. Between 10:00 and 14:00, the UV Index remains high, urging caution—particularly at 11:00 and 12:00, when protective measures are essential. As the afternoon progresses, values gradually dip, descending to 8 at 15:00 and further to 2 by 17:00. By evening, the UV Index falls to 0 at 19:00, signaling a welcome retreat from the sun's harmful rays. Remember to stay sun savvy during peak hours 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 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 14 | 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 |
The UV Index exhibits extreme levels throughout the year, with consistent ratings between 11 and 15 from January to September. The highest UV Index of 15 occurs in March, April, and September, marking these as the high-risk months for sun exposure. Visitors and residents should be particularly cautious during these months, as the burn time is as short as 10 minutes across all months listed, indicating a significant risk of skin damage. To ensure safety, it is crucial to use adequate sun protection, such as broad-spectrum sunscreen, protective clothing, and seeking shade, especially during peak sun hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Asan-Maina Village | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |
| Barrigada Village UVI | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |
| Mangilao Village UVI | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |
| Tamuning-Tumon-Harmon Village UVI | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |
| Yigo Village UVI | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |
| Dededo Village UVI | 11 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 11 |