Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Westminster, United States, where the semi-arid climate can lead to significant sun exposure. Awareness of UV levels not only aids in preventing sunburn but also plays a vital role in maintaining long-term skin health. With peak UV Index values reaching up to 10 around noon, it’s essential to recognize that even on cooler days, the sun can pose serious risks, making proactive sun safety measures essential for enjoying the outdoors while protecting your skin. As you explore the beauty of Westminster's landscapes, staying informed about UV levels will help you enjoy the sunshine safely.
The UV Index throughout the day presents a clear escalation and decline in sun exposure risk. Starting at a mild level 1 at 7:00 AM, it gradually climbs to a notable level 10 by noon, indicating peak midday sunlight intensity. The zenith occurs between 12:00 PM and 1:00 PM, where the index remains at 10, necessitating protective measures against harmful UV rays. As the afternoon progresses, the UV Index begins to taper off, dipping to level 7 by 3:00 PM and eventually returning to level 1 by 7:00 PM. To ensure skin health and safety, sun protection is essential during those high-risk hours around midday!
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, reflecting seasonal changes in sun exposure. January and December exhibit moderate UV levels (Index 4), with a burn time of 30 minutes. As spring arrives, February escalates to a high UV Index of 6 with a reduced burn time of 25 minutes. The risk peaks in March and April, hitting a very high UV Index of 8 and 10 respectively, with critical burn times of just 15 minutes. The summer months of June and July show the highest UV Index at 11, categorized as extreme, where even a brief 10-minute exposure can lead to burns. Although August and September remain very high, it’s crucial to remain vigilant. As UV levels taper off in October and November, a moderate level of risk is present again. Residents and visitors are advised to protect themselves with sunscreen, hats, and sunglasses, especially from March to September when UV exposure can be particularly harmful.
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 |
| Westminster | 4 | 6 | 8 | 10 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |