Last updated: June 2, 2025
In Marvdasht, Iran, being aware of the UV Index is crucial for protecting your skin and overall health. The UV Index, which measures the strength of ultraviolet radiation, can vary significantly throughout the day, peaking at a dangerous level of 13 around noon. Understanding these UV levels is vital for sunburn prevention and safeguarding against long-term skin damage, especially given the region's BSk climate, characterized by hot, dry summers and intense sun exposure. By staying informed about the UV Index, residents and visitors can enjoy the sunlight safely while taking appropriate precautions during the peak hours of UV radiation.
From the early morning hours, the UV Index steadily rises, beginning at a gentle 1 at 7:00 AM. As the sun climbs higher, it reaches 3 by 8:00 AM before surging to 6 at 9:00 AM. The peak occurs between 11:00 AM and 1:00 PM, with an intense UV Index of 12 at 11:00 AM and a maximum of 13 at both 12:00 PM and 1:00 PM. As the afternoon progresses, the index starts to decline, dropping to 11 at 2:00 PM, then to 8 by 3:00 PM, and further down to 5 at 4:00 PM. Finally, as the sun sets, the risk decreases significantly, ending the day at 1 by 6:00 PM, illustrating a classic curve of sun intensity throughout the day. Remember to take precautions during the peak hours to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | 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 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 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 |
As the seasons change, so too does the UV Index, with notable peaks during the late spring and summer months. January starts with a UV Index of 6 (high), but this escalates dramatically in February to 8 (very high), and peaks in May at 14, categorized as extreme. The months of March through September consistently show extreme levels (UV Index 11-14), indicating that these are high-risk times for sunburn, with a burn time of just 10 minutes during this period. As autumn arrives, the UV Index begins to taper off, with October dropping to 10 (very high) and November back to 7 (high) before reaching a low of 5 (moderate) in December. Visitors and residents should take precautions during the peak months from March to September, ensuring to use sunscreen, wear protective clothing, and limit sun exposure during peak hours to minimize 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 |
| Marvdasht | 6 | 8 | 11 | 11 | 14 | 13 | 13 | 12 | 11 | 10 | 7 | 5 |