Last updated: June 2, 2025
In Tranquillity, United States, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet radiation. Understanding the daily UV levels not only helps in preventing painful sunburns but also plays a vital role in maintaining long-term skin health. With a semi-arid climate characterized by hot summers, residents often face heightened UV exposure, particularly during midday hours when the index can soar to an intense 11 or 12. Staying informed about the UV Index empowers you to enjoy the sunny outdoors safely while safeguarding your skin's well-being.
As the sun rises, the UV Index begins to climb steadily, peaking around 12:00 PM with a blazing 11, indicating heightened sun exposure. The day starts off in a mild manner with a UV Index of 1 at 07:00, but by 10:00, we're already hitting 7. The intensity continues to escalate, reaching its zenith at 01:00 PM with a 12, essentially urging everyone to seek shade or wear protective gear. As the afternoon wanes, UV levels gradually decline; by 03:00 PM, it drops to 8, followed by a gentle decrease, reaching 2 by 06:00 PM and trailing off to 1 by 07:00 PM. It’s a classic example of how the sun’s power shifts throughout the day, reminding us to be vigilant about sun safety during those peak hours!
| 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 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | 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 |
The UV Index exhibits notable seasonal fluctuations, peaking during the summer months. From January to February, the UV levels are moderate (Index 4-5), allowing for a burn time of 30 minutes. However, as spring unfolds in March (Index 8) and April (Index 9), the risk escalates to very high, with burn times decreasing to 15 minutes. The intensity reaches its zenith in June (Index 12) and July (Index 11), marked as extreme—where just 10 minutes of unprotected sun exposure can lead to burns. August and September maintain high levels of risk, while October sees a slight decline to high (Index 7) with a burn time of 25 minutes. By November and December, the UV index drops back to moderate levels, allowing for safer outdoor activities with burn times returning to 30 minutes. Visitors and residents are advised to take precautionary measures during high-risk months (March through September) by wearing protective clothing, applying sunscreen, and seeking shade to minimize sun exposure and prevent sunburn.
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 |
| Tranquillity | 4 | 5 | 8 | 9 | 10 | 12 | 11 | 10 | 9 | 7 | 5 | 3 |
| 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 |