Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Semirom, Iran, where the sun's intensity can reach dangerous levels in mid-afternoon. Awareness of UV levels is essential not only for preventing painful sunburns but also for safeguarding long-term skin health. Semirom's Csa climate brings warm summers and plenty of sunshine, leading to elevated UV exposure risks, especially between 10:00 AM and 2:00 PM, when UV Index values soar to 13 or higher. Stay informed to protect your skin and enjoy the vibrant sun safely!
As the sun rises, the UV Index begins its ascent, peaking at a striking 13 between noon and 1 PM, making it crucial to protect your skin during these hours. The day starts gentle with a reading of 1 at 7 AM, climbing to 3 by 8 AM. By 10 AM, the intensity grows, reaching 9, and by 11 AM, it skyrockets to 11. It's during this period that sun protection becomes essential, as prolonged exposure can lead to harm. The index gradually declines after its zenith, dropping to 5 at 4 PM, before tapering off to 1 by 6 PM and remaining low through the evening. Stay informed and shield yourself wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 9 | very high | 15 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 |
The UV Index experiences significant seasonal fluctuations, peaking from late winter through summer. The months of March to September are particularly high-risk, with UV Index values reaching extremes of 11 to 14, indicating urgent precautions are needed, as burn times drop to just 10 minutes during this period. January and February begin with very high indexes of 8 and 9, while the tapering fall months of October and November present a slight decrease but still maintain relatively high levels. For visitors and residents, it’s essential to apply broad-spectrum sunscreen regularly, wear protective clothing, and seek shade, especially during peak sun hours between 10 a.m. and 4 p.m. As the UV Index decreases in December, the risk remains moderate, but vigilance is always advised to protect skin health year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Karaj UVI | 4 | 5 | 8 | 9 | 12 | 12 | 11 | 10 | 10 | 7 | 4 | 3 |
| Mashhad UVI | 4 | 5 | 8 | 10 | 12 | 12 | 12 | 11 | 10 | 7 | 4 | 3 |
| Tehran UVI | 4 | 6 | 8 | 9 | 13 | 12 | 11 | 10 | 10 | 7 | 5 | 3 |
| Tabriz UVI | 4 | 5 | 9 | 10 | 12 | 12 | 12 | 11 | 9 | 7 | 4 | 3 |
| Isfahan UVI | 5 | 7 | 10 | 10 | 13 | 13 | 12 | 11 | 10 | 9 | 6 | 4 |
| Semirom | 8 | 9 | 11 | 12 | 14 | 14 | 13 | 12 | 11 | 10 | 7 | 5 |