However, in May and June there is a wind factor to consider and dust storms are not unusual. These are not pleasant if you're hitching or trekking but usually come in squalls and can be seen coming. Lhasa and Shigatse experience very mild weather between May and November although July and August can be rainy. During the day a light shirt or jumper and lightweight pants will be suitable, but a warm fleece or down jacket is recommended for evenings.
Lhasa, Tsedang, and Shigatse
As the weather and tourist facilities in these places are quite good, you can visit them at anytime to enjoy the breathtaking scenery!
The border of Nepal/China
This area is not available for tourists from Dec-Jan because of the agricultural land; every August, the rainy season, landslides may occur.
East Tibet
Don't attempt this area in winter and in July and Aug, as there are terrible landslides in summer and frozen land in winter!
Northern Tibet
Since it is too high, with the average altitude at 4,500 M, you only can appreciate its beauty in summer!
Lhasa
The border of Nepal/China: This area is not available for tourists from Dec-Jan because of the agricultural land; every August, the rainy season, landslides may occur. Mt. Everest area: it is too cold for tourists visiting this area from Oct to April! But the beauty of the roof of the world will move you anytime you visit!
Mt.Kailishi & Manasarovar
You can enjoy the wonders in this area in May, June, July, Sep, and Oct without the problem of landslides caused by heavy rain & snow.