Last updated: July 2, 2025
In Bojnurd, Iran, being aware of the UV Index is crucial for safeguarding your skin and health under the intense sun. Understanding UV levels is essential for preventing sunburn and protecting against long-term skin damage, especially given the region’s BSk climate, which brings hot, dry summers and significant UV exposure. With daily peaks reaching 12 around noon, it’s vital to monitor these levels to enjoy the outdoors safely. Whether you’re exploring the picturesque landscapes or going about your daily routine, staying informed about the UV Index can help you make smart decisions and promote overall skin health.
The UV Index throughout the day reveals a striking pattern of solar intensity. Starting at 07:00, the index is a manageable 2, but it quickly climbs as the sun rises higher. By 08:00, it's at 4, and by 09:00, it reaches 6, signaling a push towards midday sun. The peak intensity strikes at 12:00 with a blistering 12, making it essential to seek shade and wear sunscreen. From this zenith, the index gradually declines: 11 at 13:00, 10 at 14:00, and finally dipping to 7 by 15:00. As daylight wanes, the UV levels fall rapidly, resting at 2 by 17:00 and dropping to a safe 1 by 18:00 and 19:00. Enjoy the sun, but be mindful of those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | 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 | 1 | low | 45 min |
As the seasons change, so do UV levels, significantly impacting sun exposure recommendations for visitors and residents. From January to February, the UV Index is moderate, with a burn time of 30 minutes. A sharp rise occurs in March, where the UV Index reaches 8, categorized as very high, and burn time decreases to 15 minutes. The peak of UV intensity occurs from May to August, with an extreme UV Index of 12, necessitating protective measures within just 10 minutes of exposure. September experiences a slight drop to a UV Index of 10 (very high, 15-minute burn time), while October sees a further decrease to 7 (high, 25-minute burn time). As winter approaches, months like November and December return to moderate levels, with burn times extending to 30 minutes. Visitors and residents should stay vigilant during the high-risk months of March through September, applying sunscreen, wearing protective clothing, and seeking shade to prevent skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bojnurd | 4 | 5 | 8 | 9 | 12 | 12 | 12 | 11 | 10 | 7 | 4 | 3 |
| 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 |