Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Ahtanum, United States, where the sun's rays can be particularly potent. Awareness of UV levels not only helps in preventing sunburn but also plays a vital role in maintaining long-term skin health. With a climate classified as Csb, Ahtanum experiences a range of UV exposure risks throughout the day, peaking at a UV Index of 9 around 1 PM. By staying informed about these levels, you can effectively enjoy the outdoors while safeguarding your skin against harmful effects.
The UV Index shows a distinct daily rhythm, peaking at 1 PM with a significant value of 9—a strong indicator for sun exposure. As the day unfolds, early morning starts at a comfortable 1 at 7 AM, gradually climbing to 2 by 8 AM. By 10 AM, it reaches 5, and just before noon, it surges to 8. The afternoon sees a slight dip from 9 at 1 PM to 7 by 3 PM, before slowly descending back to 1 by 7 PM. This data highlights the importance of sun protection during those peak hours, especially from 11 AM to 2 PM. Remember to stay safe and enjoy the sunshine!
| 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 | 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 exhibits significant seasonal variations, influencing the risk of sun exposure for both residents and visitors. January and December have a low UV Index of 2, allowing for a burn time of 45 minutes. As the months progress, February and March see a rise to a moderate UV Index of 3 and 5, resulting in 30 minutes of burn time. April marks the transition to a high category with a UV Index of 7, leading to a burn time of 25 minutes. The peak UV months are May, June, and July, where the Index reaches 9 and 10, indicating a very high risk and a burn time of only 15 minutes. While August sees a slight decrease to 9, the risk remains significant. September returns to high at 7, with 25 minutes of burn time, before tapering off to moderate levels in October and November. Visitors are strongly advised to take precautions from April to August, wearing appropriate sun protection, seeking shade, and limiting sun exposure during peak hours to reduce the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ahtanum | 2 | 3 | 5 | 7 | 9 | 10 | 10 | 9 | 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 |