Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Winlock, Washington, where the climate can lead to varying sunlight exposure throughout the day. As you enjoy the beautiful Pacific Northwest surroundings, being aware of UV levels can significantly aid in preventing sunburn and protecting your skin health. With maximum UV Index readings peaking at 9 during midday, it's essential to stay informed about potential risks, especially during sunnier days. Equip yourself with this knowledge to enjoy the outdoors safely while safeguarding your skin against harmful UV radiation.
As the sun rises, the UV Index begins its gradual ascent. At 7:00 AM, it starts at a modest 1, indicating minimal risk. By 8:00 AM, it rises to 2, still manageable for early risers. The intensity picks up at 9:00 AM with a 3, signaling the need for a little sunscreen. The peak arrives between 11:00 AM and 1:00 PM, where it soars to a striking 9 at 1:00 PM, which suggests strong sun protection is essential. Following this, the index slips down, recorded at 8 at 2:00 PM and 7 at 3:00 PM, offering a brief reprieve. As the afternoon fades into evening, the UV Index drops steadily, landing back at 1 by 7:00 PM. Stay informed and protect your skin during those peak hours!
| 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 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant seasonal variations, indicating an increase in sun exposure risks during certain months. High-risk months include May, June, July, and August, when the UV Index reaches its peak at 9 to 10 and falls within the very high exposure category. During these months, individuals should limit direct sun exposure, using protective measures such as sunscreen, hats, and UV-blocking clothing, as the burn time can drop to just 15 minutes. Conversely, the low-risk months of January, February, and December, with UV indices of 2 or 3, allow for longer sun exposure safely—up to 45 minutes in winter. As the UV levels fluctuate, it is essential for visitors and residents to stay informed and adapt their sun protection strategies accordingly, particularly during the peak summer months when risks are highest.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Winlock | 2 | 3 | 5 | 6 | 9 | 10 | 9 | 8 | 7 | 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 |