Last updated: July 2, 2025
Understanding the UV Index is essential for residents of Lithonia, United States. Knowledge of UV levels plays a crucial role in preventing sunburn and maintaining overall skin health, helping you enjoy the outdoors while safeguarding against harmful rays. Given Lithonia's Cfa climate, characterized by warm summers and significant UV exposure, it’s vital to pay attention to fluctuating UV levels throughout the day. Notably, during peak hours, the UV Index can soar to 11, emphasizing the importance of protection. Stay informed, stay safe, and keep your skin glowing!
As the sun rises, the UV Index peaks in intensity throughout the day, starting at a mild 1 by 07:00. Gradually, it climbs to 2 by 09:00, but the real heat kicks in just before noon, where it bursts to a crisp 9 by 12:00. The afternoon sees this intensity soar to a maximum of 11 at both 13:00 and 14:00, indicating an immediate need for sun protection. As the day begins to wind down, UV levels decrease, dropping to 5 by 17:00, and settling back to 1 by 19:00. Peak intensity typically occurs between late morning and early afternoon, reminding us to stay vigilant in safeguarding our skin during these critical hours.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | 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 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so too does the UV Index, highlighting the importance of sun protection for both visitors and residents. January and December see moderate levels (UV Index of 4), with a burn time of 30 minutes, while February ramps up to a high level (Index 7), decreasing burn time to 25 minutes. The high-risk months are clearly defined from March through August, where the UV Index reaches extreme levels (11) in May, June, and July, requiring caution with an effective burn time of just 10 minutes. April also registers a very high rating (10) with a 15-minute burn time, and August slightly decreases to a very high level again at 10. As autumn approaches, September (UV 9) and October (UV 8) remain critical, while November drops to a high UV Index of 6. In light of these variations, it is crucial for everyone to consider applying sunscreen, wearing protective clothing, and seeking shade during peak sun hours, particularly from March to August when the risk of skin damage is significantly heightened.
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 |
| Lithonia | 4 | 7 | 9 | 10 | 11 | 11 | 11 | 10 | 9 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |