The weather varies greatly with the altitude and the region in Tibet.
There are all four seasons in Tibet, although some mountain areas might be rather cold even in summer because of the high altitude.
Central Tibet and some southern regions can be very warm in summer, and winters are not as cold as many people imagine. Lhasa, for example, enjoys very comfortable temperatures throughout the year with warm summers and mild winters.
Weather in Lhasa
Summer in Lhasa
Weather in Shigatse
Southern areas: Samye, Tsedang. The elevation here is generally lower than in Lhasa, hovering a little over 2000 meters and the difference in temperatures is noticeable. Summers can be very hot
Everest Base Camp region
Mt. Kailash region
Northern areas: Namtso lake, Golmud.