Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Gangtok, India, where the unique Cwb climate not only underscores the beauty of the Himalayas but also presents specific sun exposure risks. With peak UV levels soaring to 12 around noon, awareness of these values is essential for preventing sunburns and protecting skin health. As the sun's rays can be deceptively strong during certain hours, comprehending these levels helps you enjoy the breathtaking landscapes while safeguarding your well-being. Remember, a little knowledge about the UV Index can go a long way in ensuring a safe and enjoyable experience in this stunning hill station.
The UV Index for the day showcases a dramatic rise in solar intensity as the sun climbs higher in the sky. Starting the morning with a maximum index of 4 at 07:00, it climbs swiftly to 6 by 08:00 and peaks at an intense 12 by 11:00. This strong exposure, particularly noticeable at 10:00 with a value hitting 11, signifies a crucial window for sun safety. As the afternoon progresses, the index begins to wane, dipping to 8 at 13:00 and gradually decreasing to a mild 3 by 15:00. By late afternoon, the index plummets to 1 by 16:00 and 17:00, before fading to 0 after 18:00, indicating the sun's retreat. It’s a reminder to be sun-smart, especially during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 4 | moderate | 30 min |
| 08:00 | 6 | high | 25 min |
| 09:00 | 9 | very high | 15 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | 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 variations, with the highest risk months occurring from March to September, when values peak at 14 during the summer months. Visitors and residents should take particular caution during this period, especially in April, May, June, July, and August, where the burn time dramatically decreases to just 10 minutes under extreme conditions. As the year progresses, the UV Index gradually declines, moving to very high levels in October and November with burn times of 15 minutes, before dropping to moderate and high levels in January and December. Therefore, it is crucial for individuals to employ sun protection strategies—such as sunscreen, hats, and protective clothing—during high and extreme UV Index months to minimize the risk of 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 |
| Gangtok | 5 | 7 | 9 | 11 | 12 | 14 | 14 | 14 | 12 | 10 | 8 | 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 |