Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Sirmaur, India, where the climate often features sunny days in the Csa zone. With peak UV levels reaching a maximum of 12 around midday, awareness of UV exposure is essential for preventing sunburn and protecting your skin health. By knowing the daily UV Index, you can plan outdoor activities more safely, ensuring you enjoy the vibrant sunshine while minimizing the risks associated with harmful ultraviolet rays. Remember, a little vigilance goes a long way in safeguarding your skin against the intense UV radiation that characterizes Sirmaur's climate!
The UV Index varies throughout the day, peaking dramatically around 11:00 AM and 12:00 PM at an impressive value of 12, signaling optimal conditions for sun exposure, albeit with caution. Starting from a moderate 2 at 07:00 AM, it escalates quickly to 8 by 09:00 AM. As the sun climbs higher, the index reaches a staggering 11 at 10:00 AM, before peaking at its midday highs. Afterward, the index gradually declines, slipping back to 5 by 15:00 PM and dropping to 2 by 16:00 PM. Towards the evening, the UV Index wanes further, falling to 1 by 17:00 PM and ultimately resting at 0 after 19:00 PM. This hourly data serves as a crucial reminder to stay vigilant about sun safety during those peak hours.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 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 | 12 | 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, the UV Index shows significant seasonal variation, highlighting periods of high sun exposure. January and February start with a high UV Index of 6 and 7, indicating a burn time of 25 minutes. As spring approaches, March and April see increases to 9 and 10, categorized as very high, reducing burn time to 15 minutes. The summer months escalate to extreme levels, with May, July, and August peaking at 11 to 13, where the burn time drops to just 10 minutes. September maintains an extreme rating of 11, while October decreases to very high at 9. November and December return to a high UV Index of 6, extending burn time back to 25 minutes. Visitors and residents are advised to prioritize sun protection during the high-risk months of March to October, especially when the UV Index exceeds 10, suggesting limited direct sun exposure, wearing protective clothing, and applying broad-spectrum sunscreen regularly.
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 |
| Sirmaur | 6 | 7 | 9 | 10 | 11 | 10 | 12 | 13 | 11 | 9 | 6 | 6 |
| 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 |