What is the weather like in April and May? This is the best time for us to go to Dunhuang etc.

In April, the average temperature is around 9 to 23C and still cold in the early April and the temperature will increase in the late of this month based on the previous records. In May, the average temperature is around 11 to 28C.
May to October is the best time to travel to that place. I suggested to go there in late September.

Currently in Dunhuang, have been hear for 3 days and the weather is beautiful