Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Fort Sumner, United States, where sunny days are abundant due to its BSk climate. The UV levels can fluctuate dramatically throughout the day, peaking around midday with values reaching 12, indicating a strong risk of harm from unprotected sun exposure. Awareness of UV Index ratings is essential not only for preventing sunburn but also for promoting long-term skin health. By staying informed about daily UV levels, you can better protect yourself and your loved ones from the harmful effects of excessive sun exposure, especially during the hottest hours of the day.
At sunrise, the UV Index begins its steady climb, starting at a safe 1 at 07:00. As the morning progresses, it escalates to 2 by 08:00 and reaches a pleasant 4 by 09:00. However, the real intensity hits between 10:00 and 13:00, with the UV Index peaking at a scorching 12 at 12:00, indicating a high risk of harm from unprotected sun exposure. As the afternoon unfolds, levels gradually descend, hitting 9 at 15:00 before tapering off to 4 by 17:00. By the evening hours, the index returns to a mild 1 by 19:00, reminding us of the importance of sunscreen amidst the sun's powerful midday rays.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Over the year, UV levels exhibit significant seasonal changes, peaking during the summer months. January and December have a moderate UV Index of 4, allowing for a burn time of 30 minutes. As we move into February, the UV Index rises to 7 (high), and by March, it escalates further to 9 (very high) with a reduced burn time of 15 minutes. The extreme levels begin in April with an Index of 11, continuing until July, where the Index remains high at 12-13, requiring only 10 minutes for potential skin damage. August maintains this extreme level, followed by a slight decline in September (10) and October (8). November sees a drop to 6 (high), and then it returns to 4 in December. Therefore, visitors and residents should take extra precautions from April to August, when the UV Index reaches extreme levels—wear protective clothing, apply sunscreen frequently, and limit exposure during peak hours to minimize the risk of skin damage.
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 |
| Fort Sumner | 4 | 7 | 9 | 11 | 12 | 13 | 12 | 12 | 10 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |