Last updated: August 1, 2025
Understanding the UV Index is essential for the residents of Patna, India, as it plays a crucial role in safeguarding skin health and preventing painful sunburns. With its Cwa climate characterized by a hot humid summer, Patna experiences significant UV exposure—especially during midday when the UV index peaks at an alarming 12. This highlights the importance of being aware of UV levels throughout the day, particularly from 10 AM to 2 PM, to protect yourself and your loved ones from the harmful effects of sun radiation. Empower yourself with knowledge about the UV Index and take proactive steps to enjoy the sun safely!
The UV Index throughout the day presents a fascinating journey of sunlight exposure. Early risers will notice a gentle start at 3 by 7:00 AM, quickly escalating to a more intense 5 by 8:00 AM. As the sun climbs higher, the index peaks dramatically at 11 by 10:00 AM and reaches its zenith of 12 at 11:00 AM, signaling the most potent UV rays of the day. The afternoon sees a gradual decline, with the index dropping to 9 at 1:00 PM and further to 7 at 2:00 PM, before easing to 4 by 3:00 PM. As the evening approaches, protection from UV exposure becomes less critical, with values tapering to 1 by 5:00 PM, and finally settling at 0 by 7:00 PM, inviting a safe end to the day’s sun-soaked adventures. Sun safety is paramount during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 8 | very high | 15 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 9 | very high | 15 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, the UV Index demonstrates significant seasonal variations, with high-risk months generally occurring from March to October. During this period, especially in July, August, and September, the UV Index reaches an extreme level of 12, indicating a burn time of just 10 minutes. Notably, April and June also showcase a very high index of 10, necessitating diligent sun protection. In contrast, winter months like January and December see a moderate UV Index of 5, allowing for longer exposure times of 30 minutes. Visitors and residents alike are advised to practice sun safety during high-index months—such as wearing protective clothing, using broad-spectrum sunscreen, and seeking shade during peak hours—to minimize the risk of UV-related skin damage.
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 |
| Patna | 5 | 6 | 8 | 10 | 9 | 10 | 12 | 12 | 12 | 9 | 6 | 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 |
| 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 |