Last updated: May 3, 2025
Understanding the UV Index in Semnan, Iran is crucial for maintaining skin health and preventing sunburn. As this vibrant city basks in a warm Mediterranean climate, residents and visitors alike should be aware of the varying UV levels throughout the day, especially during peak hours when the index can soar as high as 13. With midday sun posing significant risks, knowing when to take precautions is essential for enjoying the beautiful outdoors safely. By staying informed about the UV Index, you can protect yourself and your loved ones from the harmful effects of excessive sun exposure, ensuring a healthier and more enjoyable experience in Semnan’s sunny climate.
As the sun rises, the UV Index starts off gentle at 2 at 07:00, making it a comfortable time for morning activities. The intensity ramps up quickly, reaching 3 by 08:00, heralding a day of higher UV exposure. By 09:00, the index hits 6, urging caution as midday approaches. The peak arrives between 11:00 and 12:00, with the UV Index soaring to an impressive 12 and then 13, signaling that peak sun intensity is at hand. Even as the clock strikes 13:00, it remains potent at 12 before gradually softening in the following hours. By 15:00, the index drops to 8, finally settling at a milder 2 by 17:00. As evening sets in, the UV levels dwindle, resting at 1 by 18:00 and maintaining that low level through 19:00, providing a gentle end to the day's UV journey. Remember to take precautions during the peak hours for safe sun enjoyment!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels exhibit significant seasonal changes, with particularly high-risk months occurring from March to August. During this period, the UV Index peaks at 13 in May, categorized as extreme, indicating a burn time of only 10 minutes. March and April also present very high levels of UV exposure, with indices of 9 and 10, respectively. September signals a gradual decline, returning to very high levels at 10 before tapering off in the fall. For visitors and residents, it is crucial to take precautions in high-risk months by seeking shade, applying sunscreen regularly, and wearing protective clothing to minimize the risk of sunburn and long-term skin damage. Maintain vigilance, especially during the summer months when UV exposure can be dangerous.
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 |
| Semnan | 4 | 5 | 9 | 10 | 13 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
| Isfahan UVI | 5 | 7 | 10 | 10 | 13 | 13 | 12 | 11 | 10 | 9 | 6 | 4 |