Although Xining is located in the wild west, the weather is milder than you
would expect. At about 2,275 meters above sea level, the city belongs to a semi-arid
climate, characterized by low air pressure, long sunlight hours and little precipitation.
Especially noteworthy are the sharp temperature distinctions between day and
night. Generally speaking, the best time to pay the city a visit is between
May and September, an ideal time to distance yourself from the sweltering summer
in the eastern part of China.

Yearly Climate Info — Xining

Detailed information about the Average, Maximun and Minimum Temperatures and the rainfall in Xining.