Undoubtedly, Tibet is one of the harshest places for human existence. It is cool in summer, but excruciatingly cold in winter. In Lhasa, the relatively humane city in Tibet, although the temperature may exceed 29 degrees C (84 degrees F) in summer, it can also plummet to minus 16 degrees C (3 degrees F) in winter! Solar radiation is extremely strong in Tibet. The sunlight in Lhasa is so intense that the city is called Sunlight City. The thin Tibetan air can neither radiate nor absorb heat, resulting in temperature extremes during both day and night. However it is not impossible to visit the holy snow land. The period from April to October is the best time to visit Tibet, avoiding the coldest months from December to February.

In northern Tibet, the average temperature is subzero and winter lasts from October through May or June. July and August are the best time to visit the area, enjoying warm temperatures, intense sunshine, beautiful scenery, and festive events.

In eastern Tibet, May, June and September are the height of the tourism season. In winter, roads are all blocked by heavy snow. Landslides are frequent occurrences, making travel difficult.

Although southern Tibet is balmy during May through October, most rainfall also comes during this season between June and September. Heavy rains during the nights block roads and make travel difficult. However, during this season, the scenery is at its best and there are also great festive events held. Hence, it is the preferred time to visit Lhasa, Shigatse, and Nyingchi. From November through May, strong winds are common occurrences.

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