Tibet Autonomous Region has long been known as the "Roof of the world" and is no idle statement. The land veiled in secrecy, closed to the outside world for centuries. 'The Roof of the World" is now open to you. The valley bottom of Tibet are higher than the highest mountains elsewhere. Its now-covered plateau are the highest in the world. Apart from Everest, which Tibetans see form the other side, many a mountain ranges are over 1500Oft. We are introduced with chanting monks' stopped in prayer, the nomadic herds men of the Tibetan plateau single and wade through prostrating citizens as they circumambulate monasteries on their bellies while prayer flags fan the burning incense as the smoke rise towards the heaven, to God who govern by a faith compassionate to all living thing.
TIBET, "The Roof of the World", is a great land of beauty and mystery for tourists, mountaineers and explorers. When you step on the soil of the roof of the world, climb upon the world's highest peak, put on the beautiful Tibetan dress ride the Tibet pony or yak-" The boat of the Alpine plateau", look at the melting of the charming pastoral songs, spend a night in nomad's test taste mouthful of aromatic sweet Tibetan barley beer, drink a cup of specially flavored yak butter tea, eat some tasty mutton, sit around blazing, crackling fire, enjoy the melodious music form the 'Dannijan' six stringed flute, bask in the romantic charm of a night on the high plateau grasslands and explore on foot the mysterious, uninhabited, open spaces, the holy mountains and the sacred lakes, you will have on overwhelming and intoxicating experience which will be the most unforgettable time in your life. The best season for tours in Tibet is, April – November.
In fact, the Tibetan climate is not as harsh as many people imagine it to be. It is suitable for travel to Tibet from April to the beginning of November, and the best time is August and September. But if you only stay in Lhasa, you can go there anytime of the year.
Sun radiation is extremely strong in Tibet. The sunlight in Lhasa is so intense that the city is called Sunlight City. The thin air can neither block off nor retain heat so that the temperature extremes can be met in daytime and the same night respectively in Tibet. However it is not impossible to visit the holy snow land. May, June and September are the tourism season in east Tibet.
Most annual rainfall comes in the rainy season that starts from June to September. Usually it rains at night in Lhasa, Shigatse and Chamdo area. The rainfall may block roads and make travel difficult but the scenery at the time will be the best.
Here is some more specific information in different areas of Tibet:
Lhasa - Shigatse - Lhatse - Tingri - Nyalam: Along the Friendship highway is basically in good conditions year around. But from December to February, the road could make some trouble. Try to avoid August - landslide could happen in the rainy season.
Mt. Everest Area: Early May and early October are the best time to visit Mt. Everest. Due to the clear weather, you have great chance to see Mt. Everest's true face (if you are lucky). From December to February, you'd better not to go to this area because it is too cold - except you are real Great Adventure People.
Ali (Mt.Kailash): Even without climate restrictions, this area is already inhospitable. Big rain and snow could make the journey worse. However, for those determined tourists, the appropriate time is May, June, July, September and October.
Eastern Tibet: Don't go to this area in July or August (the rainy season) because the rain could ruin the road, and make terrible landslides. In winter, the road could be frozen.
Northern Tibet: With the average altitude of 4,500m, this area offers very limited time for tourists. Summer (July to August) is the prime time to enjoy the great plain in northern Tibet.