Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Heihe, China, particularly given its unique ET climate that brings distinct sun exposure challenges. With peak UV levels soaring to 18 during midday, awareness of these radiation levels can significantly impact your skin health by preventing sunburn and long-term damage. As Heihe experiences a variety of seasonal weather, recognizing when UV exposure is at its highest helps you take necessary precautions—whether it's applying sunscreen, wearing protective clothing, or seeking shade. Stay informed and protect yourself from the sun's harmful rays while enjoying all that Heihe has to offer!
The UV Index throughout the day showcases a distinct rise and fall, reflecting the sun's intensity. Starting off gently at 7:00 AM with a UV index of 1, it gradually increases, hitting 2 by 8:00 AM. The real surge begins at 9:00 AM, where it spikes to 4, and continues climbing to 8 by 10:00 AM. At 11:00 AM, the index reaches a striking 12—indicative of moderate risk—before peaking at an astonishing 16 at noon. The intensity reaches its zenith at 1:00 PM with a maximum of 18, where caution is highly advised. As the afternoon progresses, the levels remain elevated at 18 until 2:00 PM, before gradually easing to 15 by 3:00 PM, and further dropping to 11 at 4:00 PM. The evening sees a steep decline, with the index falling to 3 by 6:00 PM, and eventually back to 1 by 7:00 PM, as the sun sets on a day defined by fluctuating UV exposure.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 16 | extreme | 10 min |
| 13:00 | 18 | extreme | 10 min |
| 14:00 | 18 | extreme | 10 min |
| 15:00 | 15 | extreme | 10 min |
| 16:00 | 11 | extreme | 10 min |
| 17:00 | 7 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant fluctuations, with the highest risk months occurring from March to September, where values reach extreme levels of 11 to 18, resulting in a burn time as low as 10 minutes. In contrast, January and December present moderate exposure, while October and November are classified as very high. Residents and visitors should exercise caution during the high-risk months by seeking shade, wearing protective clothing, and applying sunscreen with a high SPF regularly to mitigate potential harm from increased UV radiation. Staying informed and adjusting outdoor activities accordingly can help ensure safety during these sun-intensive periods.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beijing UVI | 2 | 3 | 5 | 8 | 9 | 9 | 10 | 9 | 7 | 6 | 4 | 2 |
| Chengdu UVI | 5 | 6 | 8 | 10 | 12 | 11 | 11 | 10 | 11 | 8 | 6 | 4 |
| Shanghai UVI | 5 | 6 | 8 | 10 | 10 | 11 | 12 | 11 | 11 | 8 | 6 | 4 |
| Guangzhou UVI | 7 | 9 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 10 | 9 | 7 |
| Shenzhen UVI | 7 | 10 | 12 | 12 | 14 | 13 | 13 | 13 | 12 | 11 | 9 | 7 |
| Heihe | 4 | 7 | 11 | 13 | 18 | 16 | 15 | 15 | 13 | 10 | 8 | 5 |