Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Tsagaannuur, Mongolia, where the climate can bring varying levels of sun exposure throughout the day. With maximum UV readings peaking at 9 during midday, it's essential to recognize the significance of UV levels in preventing sunburn and maintaining overall skin health. Tsagaannuur's cold, dry climate (classified as Dwc) presents unique risks; even in cooler temperatures, high UV radiation can unexpectedly affect those outside. Being aware of the UV Index empowers the community to take proactive steps in safeguarding their skin from harmful rays.
The UV Index throughout the day showcases a dynamic rise and fall, peaking sharply at 9 around 1 PM. Starting from a low of 1 at 7 AM, the index gradually climbs to 2 by 8 AM, before surging to 5 at 10 AM. It reaches 7 just before noon, and by 12 PM, it hits 8, signaling a strong need for sun protection. The highest point of 9 at 1 PM emphasizes the intensity of midday sun. As afternoon approaches, the index begins to decline, tapering off to 8 at 2 PM, and gently lowering to 6 by 4 PM. By the time the sun sets, the UV Index drops back to 1 at 7 PM, wrapping up the day. It's crucial to remain vigilant and protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The seasonal UV changes show a notable increase in UV Index from January (UV Index 2) to April (UV Index 7), with May through August being the peak months for UV exposure, where the index reaches its highest levels at 9, indicating very high risk. High-risk months are primarily from April to August, with especially critical periods in May, June, and July, where burn times drop to just 15 minutes. To ensure safety, both visitors and residents should take precautions during these months by seeking shade, wearing protective clothing, and applying sunscreen regularly. As the UV Index decreases again in September and remains lower through the end of the year, risks become less pronounced, but it's essential to stay informed and protect your skin year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Darhan UVI | 1 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Erdenet UVI | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Tsagaannuur | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 6 | 5 | 2 | 1 |
| Ulan Bator UVI | 2 | 3 | 5 | 7 | 9 | 9 | 9 | 9 | 6 | 4 | 3 | 1 |
| OElgii UVI | 2 | 3 | 5 | 7 | 10 | 9 | 9 | 9 | 7 | 5 | 2 | 1 |
| Khovd UVI | 2 | 3 | 6 | 7 | 10 | 10 | 9 | 9 | 7 | 5 | 2 | 1 |