Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Loyalton, where the unique Csb climate offers both sunny days and potential sun exposure risks. Being aware of UV levels helps in effectively preventing sunburn and maintaining overall skin health. During peak hours, especially around midday when UV levels can skyrocket to 12, it becomes essential to take protective measures. Knowing when to seek shade or apply sunscreen can make all the difference in enjoying the beautiful outdoors while safeguarding your skin from damaging rays.
The UV Index throughout the day presents a fascinating pattern as the sun ascends. At 07:00, the index starts at a gentle 1, indicating minimal risk. However, by 09:00, it climbs to 4, marking the arrival of noticeable sunlight. The real intensity hits its peak at 12:00, soaring to an impressive 11—a cautionary moment for those outdoors. As we move through the afternoon, the index remains elevated, reaching 12 at 13:00 before gradually descending, settling back to 7 by 16:00. The evening sees a return to safer levels with 2 at 18:00 and finally back to 1 as the day wanes at 19:00. This dynamic shift underscores the importance of sun protection during peak hours, particularly from 10:00 to 14:00.
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | 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, peaking during the summer months. From March to August, the UV Index reaches its highest levels, particularly in May, June, and July, where it hits an extreme rating of 12. This signifies that the risk of harm from unprotected sun exposure is notably elevated, with a burn time as short as 10 minutes. March and April also present high-risk conditions with UV Index values of 9 and 10, requiring vigilance. Conversely, January, November, and December see a return to moderate levels, allowing for a more leisurely sun exposure of up to 30 minutes. Residents and visitors are advised to take extra precautions, especially during the high-risk months of March to August, by wearing sunscreen, protective clothing, and seeking shade during peak sun hours to minimize the risk of skin damage.
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 |
| Loyalton | 4 | 6 | 9 | 10 | 12 | 12 | 12 | 11 | 10 | 7 | 5 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |