Tibet plateau is regarded as the "roof of the world" with average altitude of over 4000m, due to high altitude in Tibet and the temperature is usually lower than same season in any other cities in China. The air is a little thin there,so it’s necessary to get some knowledge about “altitude sickness prevention”.The weather in Tibet
is not as harsh as many people imagine. Tibet has a dry, cold climate with an average annual temperature ranging from -12° to 9°, depending on the region. Temperatures in the mountains and plateaus are especially cold, and strong winds are common year round. The river valleys experience a more moderate climate. Lhasa and central Tibet have an average temperature of 0° in December and an average of 17° in June. The temperature can range widely on any given day. On a typical summer day, the temperature can rise from 3° before sunrise to 27° by midday. In general, temperatures in Tibet drop suddenly after sunset.