Last updated: June 2, 2025
Staying aware of the UV Index is crucial for residents of Winthrop, United States, where sunny days can quickly lead to increased sun exposure. Understanding UV levels helps in preventing sunburn and protecting overall skin health, especially when peak values reach as high as 10 from late morning to early afternoon. With Winthrop's Dfa climate, characterized by a marked seasonal variation in temperature and exposure to direct sunlight, it's essential to be proactive about UV safety. By taking the time to check the UV Index, you can enjoy the outdoors while minimizing your risk of skin damage!
The UV Index today reveals a clear pattern of solar intensity peaking as the day progresses. Starting at a low 1 at 07:00, it steadily climbs to 2 by 08:00 and further to 3 by 09:00. The sun asserts its dominance with a 6 at 10:00, escalating dramatically to 8 at 11:00. The intensity reaches its zenith with a staggering 10 from 13:00 to 14:00, the point at which sun safety becomes crucial. As the afternoon wears on, the index begins to taper off, dropping to 8 at 15:00, and further cooling to 4 by 17:00. The evening ushers in a return to more manageable levels, with 2 at 18:00 and winding down to 1 by 19:00. Plan your outdoor activities wisely, savoring the sun's rays during the peak hours while taking precautions to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | 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 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 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 |
Throughout the year, the UV Index experiences significant fluctuations, particularly from spring through summer. High-risk months for UV exposure are from April to September, where the UV Index peaks at 10 in June and July, indicating a very high exposure category with a burn time of only 15 minutes for unprotected skin. In contrast, the winter months of December and January present lower levels, with UV Index values of 2 and 3 respectively, allowing for longer burn times of 45 and 30 minutes. Visitors and residents are strongly advised to take precautions during high-risk months by wearing protective clothing, applying sunscreen regularly, and seeking shade when outdoors, especially during peak sun hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Winthrop | 3 | 5 | 5 | 8 | 9 | 10 | 10 | 9 | 8 | 5 | 3 | 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 |