Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Sarpang, Bhutan, where the elevated sun exposure can pose significant risks to skin health. With the subtropical highland climate characteristic of this region, UV levels can soar, particularly between 10 AM and 2 PM, peaking at an intense 12 around midday. Being aware of these UV indices is not just about sunburn prevention; it also plays a vital role in reducing the risk of long-term skin damage. By keeping track of UV levels, you can take proactive measures to protect yourself and enjoy the beautiful outdoors safely!
The UV Index for the day starts off relatively low at 4 by 7:00 AM, gradually climbing to a peak of 12 at 11:00 AM. At this hour, the sun is at its most intense, making it crucial to take appropriate sun protection measures. As the afternoon progresses, the index dips to 10 by noon, followed by a gentle decline: down to 8 at 1:00 PM and further to 5 by 2:00 PM. The day winds down with significantly lower values, hitting 3 at 3:00 PM and dropping to 1 by late afternoon. By evening, at 6:00 PM and 7:00 PM, the UV Index falls to 0, signaling the end of sun exposure risks for the day. This clear variance throughout the hours underscores the importance of being sun-smart, especially during the midday hours when UV levels are at their highest.
| 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 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 5 | moderate | 30 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, the UV Index reveals significant seasonal changes, with the highest risk occurring from May to September. During these months, the UV Index reaches extreme levels of 12 to 13, with a burn time of only 10 minutes. The intensity of ultraviolet radiation peaks in July and August, necessitating extra precautions for sun exposure. In contrast, the winter months of January and December see a moderate to high risk, with UV levels dropping but still requiring attention, particularly in the sunny hours. For both residents and visitors, it's crucial to stay informed about daily UV levels and take appropriate protective measures, such as wearing sunscreen, protective clothing, and seeking shade, especially during the high-risk months of March, April, and the peak summer months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sarpang | 5 | 7 | 9 | 10 | 12 | 12 | 13 | 13 | 11 | 10 | 7 | 6 |
| Phuntsholing UVI | 5 | 7 | 9 | 10 | 11 | 13 | 14 | 13 | 12 | 10 | 8 | 6 |
| Pemagatshel UVI | 6 | 8 | 10 | 13 | 13 | 14 | 15 | 14 | 13 | 11 | 8 | 6 |
| Tsirang UVI | 6 | 9 | 10 | 12 | 13 | 14 | 15 | 14 | 13 | 11 | 8 | 6 |
| Punakha UVI | 8 | 10 | 12 | 14 | 15 | 15 | 16 | 15 | 14 | 11 | 9 | 6 |
| Thimphu UVI | 8 | 10 | 13 | 14 | 16 | 16 | 16 | 15 | 14 | 12 | 9 | 7 |