Dunhuang is located in inland. So the sunshine there is adequate and the climate there is dry. However, the four seasons in Dunhuang is very distinct. The most giant difference lies on temperature.
When refers to the obvious problem, most people will think of Sandstorms with wind gusts, which sometimes reaches the speeds of 3 meters per second. If you travel there, you will find that the city is threatened with being engulfed by the expansion of the Kumtag Desert, which attributes to longstanding overgrazing of surrounding lands.