Last updated: July 2, 2025
In Newton, United States, awareness of the UV Index is crucial for protecting yourself and your loved ones from harmful sun exposure. Understanding UV levels can significantly reduce the risk of sunburn and long-term skin damage, promoting overall skin health. Given Newton's humid subtropical climate, with summers that invite outdoor activities, it's essential to stay vigilant. During peak hours, particularly between 11 AM and 2 PM, the UV Index can reach dangerous levels of 10 to 11, highlighting the need for proactive sun safety measures. Stay informed and enjoy the sun safely!
Today's UV Index presents a dynamic landscape of sun exposure. The day begins with a mild index of 1 at 7:00 AM and 8:00 AM, ideal for enjoying a morning stroll. As the sun ascends, we hit 2 by 9:00 AM, before a significant leap to 5 at 10:00 AM. The intensity peaks dramatically at 12:00 PM, marked with a dazzling 10, then soars to an impressive 11 from 1:00 PM to 2:00 PM. As we transition into the afternoon, a gradual decline ensues, dropping to 8 at 4:00 PM, followed by 5 at 5:00 PM, then a gentle descent to 3 by 6:00 PM. The evening settles back to a 1 by 7:00 PM. Stay sun safe! Remember to protect your skin during the peak hours of UV exposure!
| 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 | 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 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences notable seasonal changes, with high-risk months primarily occurring from February through August. During this period, the UV Index reaches its peak, consistently showing an extreme category of 11 for the summer months. In April, the UV Index escalates to 11, with a minimal burn time of just 10 minutes. Visitors and residents are advised to take precautionary measures, particularly from February to August, by wearing protective clothing, applying sunscreen, and seeking shade during peak hours to minimize skin damage. As the season transitions into September and October, the UV Index declines to 10 and 8, respectively, indicating a slightly lower risk, yet protective measures remain important. In the cooler months of November and December, the UV Index decreases further to 6 and 4, where the risk is manageable but still requires some attention to prevent overexposure.
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 |
| Newton | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 11 | 10 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |