The best time to Tibet tourism is late may--the middle of October. Because may and June in southern Tibet is the dry season, Everest region of ice and snow is just began to melt, is the best time to go there, so this time of year is up to mount Everest peak season. Late October start, the bulk of area has already enter winter, a rainfall word is the snow. Ice and snow mountains, much more numerous journey safety factor, in addition to Lhasa and xigaze, Lin zhi, the concern is not big, more local may be difficult to reach.
I have been to Tibet in the experience for, or 7, in August is the best. Because the average tourists may not to ascend snow mountain, the late may temperatures are a little too low. July and August although more rain, but you may enjoy summer snow, and, in this period of Tibetan festival in the more more, like the sholton. Plateau summer short, all kinds of plant flowering more concentrated, there feeling like spring.