Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Bojnurd, Iran—a region known for its BSk climate, characterized by hot summers and sunny skies. Awareness of UV levels is essential for sunburn prevention and overall skin health, especially during peak hours when the index reaches high levels. For instance, from 10 a.m. to 1 p.m., the UV Index can soar to 12, indicating a very high risk of harm from unprotected sun exposure. By staying informed and taking necessary precautions, such as wearing sunscreen and protective clothing, you can enjoy the beautiful Bojnurd sunshine while safeguarding your skin from potential damage.
As the day unfolds, the UV Index climbs steadily, peaking at a striking 12 around noon, signaling a high risk for skin damage without protection. Early risers at 07:00 encounter a mild 2, but the intensity increases quickly, reaching 9 by 10:00 and a critical 11 by 11:00. From 12:00 to 13:00, the index holds its highest point at 12, making it essential to seek shade or apply sunscreen. After 13:00, the UV levels gradually decrease, dropping back to a manageable 4 by 16:00 and winding down to a safe 1 by 18:00. This hourly data serves as a reminder to take sun safety precautions, especially during 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 | 9 | very high | 15 min |
| 15:00 | 6 | 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 |