Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Ellensburg, United States, where the sun's rays can be particularly intense. As a city in the BSk climate zone, Ellensburg experiences significant variations in UV exposure throughout the year. Monitoring UV levels isn't just about avoiding sunburn; it plays a vital role in protecting skin health and preventing long-term damage. With peak indices ranging from 7 to 9 during midday hours, it's essential for locals to stay informed and take proactive measures to enjoy the outdoors safely while minimizing risks associated with excessive sun exposure.
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, UV exposure varies significantly. January and December typically present a low risk with a UV Index of 2, allowing for about 45 minutes of sun exposure before burning. As spring approaches, February jumps to a moderate level (UV Index 4), indicating a burn time of 30 minutes. March and April see a rise to high UV levels (Index 6 and 7), with burn times decreasing to 25 minutes. The summer months, particularly May through August, are the most critical, marked by very high UV Index readings of 9 to 10, necessitating a mere 15 minutes of exposure before risking sunburn. September remains very high at UV Index 8 but provides a slightly extended burn time of 15 minutes. As temperatures cool, October and November return to a moderate category (UV Index 3 to 5), allowing 30 minutes of safer sunlight exposure. Residents and visitors alike should remain vigilant during the high-risk months of May to September, practicing sun safety by seeking shade, wearing protective clothing, and applying sunscreen regularly to reduce skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ellensburg | 2 | 4 | 6 | 7 | 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 |