Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Bengaluru, India, where the combination of a subtropical climate and high sun exposure can lead to increased UV radiation levels. Knowledge of UV levels not only helps in preventing sunburn but also plays a vital role in maintaining skin health over time. Typical UV exposure in Bengaluru peaks around midday, often reaching levels of 11-13, which poses significant risks if protective measures are not taken. By staying informed and taking appropriate precautions, you can enjoy the vibrant outdoors while safeguarding your skin from harmful UV rays.
As the sun rises, the UV Index begins its ascent, starting at a gentle 2 by 7:00 AM. By 8:00 AM, it increases to 4, signaling a bit more caution for those heading outdoors. The index climbs significantly, reaching 7 at 9:00 AM, and peaks at a striking 13 by 11:00 AM and 12:00 PM. This intense midday sun warrants protective measures, as the UV levels begin to taper off after 1:00 PM, dropping to 11 at 1:00 PM and then descending to 8 by 2:00 PM. As the afternoon progresses, the levels decrease further, settling at 5 by 3:00 PM and steadily falling to 1 by 5:00 PM. The day winds down into the evening, with UV levels reaching 0 by 7:00 PM, marking a safe end to sun exposure. Always remember to protect your skin during the peak hours!
| 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 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV levels show significant seasonal changes, remaining in the extreme exposure category from January to October, with peak values in April, June, July, August, and September where the UV Index reaches 14. The high-risk months for UV exposure are from April to September, when individuals can burn within just 10 minutes of direct sun exposure. Visitors and residents are strongly advised to take necessary precautions during these months, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade whenever possible. In contrast, November and December experience slightly lower UV levels, with indexes of 11 and 10, respectively, suggesting a reduced but still significant risk with a longer burn time of 15 minutes in December. Overall, vigilance is essential year-round to protect against harmful UV radiation.
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 |
| Hyderabad UVI | 10 | 11 | 12 | 11 | 13 | 13 | 15 | 14 | 13 | 11 | 8 | 8 |
| Bengaluru | 11 | 13 | 13 | 14 | 13 | 14 | 14 | 14 | 14 | 12 | 11 | 10 |