Last updated: June 2, 2025
In Yazd, Iran, understanding the UV Index is essential for protecting your skin and overall health. With scorching desert temperatures and a BWk climate, exposure to harmful ultraviolet radiation can lead to sunburn and long-term skin damage. The UV levels in Yazd can soar throughout the day, peaking at 13 between noon and 1 PM, making it crucial for residents and visitors alike to stay informed about daily UV risks. By monitoring the UV Index, you can take proactive steps to enjoy the sun safely, ensuring your outdoor activities don’t come at the cost of your skin's health.
As the sun rises, the UV Index begins its ascent, starting at a mild 2 at 07:00. By 08:00, it nudges up to 3, signaling the day’s potential for outdoor activity. However, 09:00 sees a sharper increase to 6, and as we reach 10:00, the index peaks dramatically at 9. The sun is at its zenith by 11:00, with a blistering 11 on the scale, followed closely by an intense 13 at 12:00—making midday the most hazardous time for unprotected sun exposure. As the afternoon progresses, the UV Index gradually declines: 12:00’s peak of 13 slips to 10 by 14:00, then to 7 at 15:00, and experiences a further dip to 5 by 16:00. By the evening, the intensity wanes, with the index dropping to 2 at 17:00 and settling at 1 for the final hours from 18:00 to 19:00. Those staying vigilant about sun safety can enjoy the earlier hours while taking cover as the sun begins to set.
| 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 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 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 |
The UV Index exhibits significant seasonal changes, peaking from March to September when it reaches extreme levels of 11 to 13, indicating a high risk of harm from unprotected sun exposure. Notably, May and June are the months with the highest UV Index measurements, making them particularly hazardous for outdoor activities, with a burn time as short as 10 minutes. Conversely, the winter months (January and December) show lower UV indices of *5 and 4, categorized as moderate, offering a relatively lower risk of sunburn. Visitors and residents are advised to take extra precautions during high-risk months from February through September, such as wearing sunscreen, protective clothing, and seeking shade during peak hours to mitigate the risk of skin damage.
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 |
| Yazd | 5 | 7 | 11 | 11 | 13 | 13 | 12 | 11 | 11 | 9 | 6 | 4 |