I am travelling Xian to Urumchi to Kashgar and Biskek in September. What is the weather at that time

September is one of the best seasons for visiting Xinjiang. The weather at that time is quite pleasant and the scenery is beautiful. However, the temperature there differs greatly between day and night, so you are suggested to take some warm clothes like sweater and coat. If you go to some remote areas, please be sure to bring heavy winter wear to keep warm.