Last updated: June 2, 2025
In the charming town of Lyman, United States, understanding the UV Index is crucial for safeguarding your skin and overall health. With a Dfb climate that features warm summers, residents are exposed to varying levels of ultraviolet radiation throughout the day, peaking at 12 between 1 PM and 2 PM. Being aware of these UV levels helps prevent painful sunburns and reduces long-term skin damage, ensuring you can enjoy outdoor activities safely. As you embrace the beauty of Lyman's sunny days, staying informed about the UV Index can make a significant difference in your sun safety and skin health.
As the sun rises, the UV Index begins its ascent, reaching 1 by 07:00. By 08:00, it climbs to 2, signaling the start of the day’s UV exposure. Things heat up quickly, reaching 4 at 09:00 and then jumping to 6 by 10:00. The intensity peaks dramatically at 12:00, hitting 11, and just an hour later, 13:00, it reaches its maximum of 12. This high level continues until 14:00, where it remains steady. As the afternoon progresses, the UV Index begins to decline: jotting down to 10 at 15:00, then 8 at 16:00, and tapering off to 5 by 17:00. By the evening hours, it gently reduces to 3 at 18:00 and settles back to 1 by 19:00. This cycle underscores the importance of sun safety during peak hours, especially between 11:00 and 14:00 when UV exposure is at its strongest.
| 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 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations, peaking during the summer months of May to August, where it reaches extremes of 11 to 12. The highest risk occurs in May, June, and July, with burn times as short as 10 minutes under these conditions. March and April also present considerable UV exposure, categorized as very high, with burn times of just 15 minutes. Visitors and residents should exercise caution from late winter through summer, especially during these high-risk months, by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen regularly to minimize the risk of skin damage. As the season transitions into fall and winter, UV levels decrease, offering more moderate exposure from October to December.
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 |
| Lyman | 4 | 6 | 8 | 10 | 11 | 12 | 12 | 11 | 10 | 7 | 5 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |