Historical weather of Dunhuang in April, 20 16: average high temperature: 23℃, average low temperature: 7℃, extreme high temperature: 28℃ (April 30th), extreme low temperature:-2℃ (April16th).

Historical weather in Jiayuguan city in April, 20 16: average high temperature: 15℃, average low temperature: 4℃, extreme high temperature: 24℃ (April 28th), extreme low temperature:-3℃ (April 16th). Average air quality index: 55, air is the best: 26, air is excellent (April 22nd), air is the worst: 179, with moderate pollution (April 30th).

The historical weather in Zhangye city in April is 20 16: average high temperature: 20℃, average low temperature: 5℃, extreme high temperature: 27℃ (April 30th), extreme low temperature:-3℃ (April17th). Average air quality index: 65, the best air is 4 1, the air is excellent (April 17), and the worst air 136, with slight pollution (April 3).