Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Wallis, United States, where the sun can be unforgiving. With regular exposure to high UV levels, particularly in the afternoon when the index peaks at 11, staying informed can be a vital step in preventing sunburn and protecting your skin's health. In Wallis, characterized by a Cfa climate, the warmth and clear skies often lead to increased UV radiation, making it essential to grasp the daily UV fluctuations. By keeping an eye on the UV Index, you can enjoy the outdoors while safeguarding your skin from harmful effects!
The UV Index for the day showcases a dramatic increase in intensity as the sun climbs higher in the sky. Starting at a mild 1 at 07:00, it remains low throughout the morning, only reaching 3 by 09:00. However, by 11:00, the index skyrockets to 8, peaking at an intense 11 from 13:00 to 14:00. As the afternoon wanes, the UV levels gradually decrease, dropping to 4 by 17:00 and tapering off to 1 once again by 19:00. It's clear that midday hours pose the greatest risk for sun exposure, making it crucial to take precautions during the peak hours from 11:00 to 14:00.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal variations in UV exposure present important considerations for both visitors and residents. From January to March, UV levels gradually increase, with February and March categorized as very high, requiring 15 minutes for potential skin damage. The peak months occur from April to August, where the UV Index reaches extreme levels (up to 12), demanding heightened caution and limiting unprotected exposure to 10 minutes. In September and October, the index remains in the very high category, allowing for 15 minutes of exposure before burns may occur. Later in the year, November sees a decrease to a high level (UV Index 7) with a burn time of 25 minutes, while December returns to a moderate level (UV Index 5, burn time of 30 minutes). To protect against harmful UV radiation, it is crucial for everyone to apply sunscreen generously, wear protective clothing, and seek shade during the most intense sun hours, especially from April to August.
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 |
| Wallis | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 12 | 10 | 9 | 7 | 5 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |