Travel in May for 10 persons age 14-81 years old. How is the extreme lowest and higher temperature on Silk Road

During May, the lowest temperature on the way should be 8-10C and the highest temperature reach around 30C.

It is suggested to turn to a trust worthy travel agency to rent such a van for your trip. Maybe you also need a tour guide. As for the cost, you may consult a travel agency as well.