Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Ranchi, India, as it provides valuable insight into daily sun exposure and helps in making informed decisions to protect skin health. With Ranchi's Cwa climate, characterized by hot summers and significant sunlight, comprehending UV levels is essential for preventing harmful effects like sunburn and long-term skin damage. Notably, the UV Index peaks at an alarming 13 around noon, highlighting the increased risk during peak sun hours. Stay informed and safeguard your skin by monitoring the UV Index while enjoying the vibrant outdoors of Ranchi!
As the day unfolds, the UV Index follows a dynamic trajectory, peaking around midday. Starting from a low of 3 at 07:00, the intensity escalates sharply, reaching 6 by 08:00. The sun's rays become increasingly potent, surging to a striking 12 at 10:00 and hitting a maximum of 13 between 11:00 and 12:00. After this zenith, the index begins its graceful descent, dipping to 11 by 13:00, then dropping further to 7 at 14:00. By mid-afternoon, the intensity wanes significantly, landing at 4 by 15:00 and continuing to decline to 1 by 17:00. As the sun sets, the UV Index finally settles at 0 by 18:00, indicating a gentle end to the day’s solar intensity. Be sure to take precautions during peak hours to safeguard your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 6 | high | 25 min |
| 09:00 | 9 | very high | 15 min |
| 10:00 | 12 | extreme | 10 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit significant seasonal variation, with the highest readings occurring from April to October. During this period, the UV Index reaches its peak in August at 14, indicating an extreme exposure category and a minimal burn time of just 10 minutes. February and March also present high-risk conditions, with values of 8 and 10 respectively, categorized as very high. Residents and visitors should exercise caution during these months and take protective measures, including wearing sunscreen, protective clothing, and seeking shade, especially during midday hours when UV radiation is strongest. As the year transitions to November and December, the UV Index decreases to 8 and 7, respectively, returning to very high and high exposure categories, which still warrants protective actions, albeit with longer burn times of 15 and 25 minutes. Ultimately, being mindful of UV levels throughout the year is crucial for skin health and safety.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Delhi UVI | 5 | 6 | 9 | 10 | 10 | 10 | 12 | 12 | 9 | 8 | 5 | 5 |
| Mumbai UVI | 8 | 9 | 10 | 11 | 11 | 12 | 13 | 13 | 11 | 10 | 7 | 7 |
| Ahmedabad UVI | 7 | 8 | 10 | 12 | 11 | 12 | 13 | 13 | 11 | 10 | 7 | 6 |
| Ranchi | 7 | 8 | 10 | 11 | 11 | 13 | 13 | 14 | 13 | 11 | 8 | 7 |
| Hyderabad UVI | 10 | 11 | 12 | 11 | 13 | 13 | 15 | 14 | 13 | 11 | 8 | 8 |
| Bengaluru UVI | 11 | 13 | 13 | 14 | 13 | 14 | 14 | 14 | 14 | 12 | 11 | 10 |