Last updated: May 3, 2025
In Birjand, Iran, understanding the UV Index is crucial for protecting your skin and overall health. With UV levels peaking during the midday hours, reaching a staggering 13 at noon, awareness of these levels can help you take essential precautions against sunburn and long-term skin damage. Birjand, characterized by its arid climate (BSk), experiences significant sun exposure, making it vital to stay informed about the UV risks throughout the day. Whether you're enjoying the outdoors or simply commuting, being mindful of the UV Index can make a world of difference in safeguarding your skin health.
The UV Index (UVI) throughout the day presents a clear picture of sun intensity, reaching its zenith in the late morning to early afternoon. Starting from a mild 2 at 7:00 AM, the index rapidly escalates, peaking at an impressive 13 between 11:00 AM and 12:00 PM. This is the critical time for sun exposure, where the risk of harm from unprotected skin is significant. As the afternoon progresses, the UVI begins to decline, dropping to 10 by 2:00 PM and further down to 4 by 4:00 PM. By 6:00 PM, the UVI has receded to a gentle 1, fading to 0 by 7:00 PM. It's essential to take precautions during the peak hours to protect your skin from potential damage.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 13 | 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 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The seasonal UV changes reveal a notable increase in UV Index values from January to August, peaking at 13 during the summer months of May through July, categorized as extreme. March marks the transition to very high UV levels, while September begins a gradual decline back to lower levels. High-risk months include March to September, where residents and visitors are exposed to significant UV radiation and should be particularly vigilant. During these months, it is advised to seek shade, wear sun protection such as sunscreen and protective clothing, and limit outdoor activities during peak sunlight hours. The burn time drastically decreases during this peak period, with just 10 minutes of unprotected exposure potentially leading to skin damage. In contrast, the winter months of January and December present moderate exposure, with burn times extending to 30 minutes, indicating a lower immediate risk but still warranting some sun protection.
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 |
| Birjand | 5 | 7 | 10 | 11 | 13 | 13 | 13 | 12 | 11 | 9 | 6 | 4 |