Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Wrentham, United States, as it serves as a vital indicator of potential sun exposure and related risks. With typical UV levels peaking at a notable 9 during midday hours, awareness of these fluctuations is essential for effective sunburn prevention and promoting long-term skin health. Situated in a Cfa climate zone, Wrentham experiences significant seasonal changes, leading to varying UV exposure risks that can affect anyone spending time outdoors. Stay informed and protect your skin by keeping an eye on the UV Index!
The UV Index for today presents an intriguing journey through the hours. It starts off gently at 1 at 07:00, but as the morning progresses, it climbs swiftly to 2 by 08:00 and reaches a moderate 4 at 09:00. The sun intensifies its rays further, peaking at a robust 9 between 12:00 and 13:00—a reminder to take precautions against harmful UV exposure. Following this peak, the index gradually descends, dipping to 6 at 15:00, and mellowing down to 1 by 18:00. This pattern highlights the importance of seeking shade or applying sunscreen during the midday hours when UV radiation is most potent.
| 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do the UV Index levels, indicating varying risks of skin damage from sun exposure. January and February start at a moderate UV Index of 3 and 5 respectively, allowing a relatively safe burn time of 30 minutes. However, in March, the UV Index climbs to 6 (high), and April ramps up to 8 (very high), reducing burn time to just 15 minutes. The peak months of May through August maintain a critical UV Index of 9, portraying significant risk with the same short 15-minute burn time. As summer wanes into September and October, the risk remains high with UV levels at 7 and 6, respectively, but allows for a slightly more forgiving 25-minute burn time. By November and December, UV levels drop again to moderate and low, providing burn times of 30 and 45 minutes. Visitors and residents are advised to take precautions during high-risk months, especially from April through August, by wearing sunscreen, protective clothing, and limiting sun 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wrentham | 3 | 5 | 6 | 8 | 9 | 9 | 9 | 9 | 7 | 6 | 4 | 2 |
| 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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |