Tibet plateau is regarded as the "roof of the world" with average altitude of over 4000m, due to high altitude in Tibet and the temperature is usually lower than same season in any other cities in China, it's a little bit harsh with thin air, strong ultraviolet ray and distinct rainy & dry season.
The best time to travel to Tibet is from April to Oct each year, with the best weather condition and delightful sceneries. The average temperature is above 10°C and the oxygen content is comparatively higher than other seasons. It's also the peak tourist season in Tibet.
July and August is the rainy season in Tibet, though it usually rains at night.
The best months for camping and trekking are May and September when it hardly rains at all. If you are going visit Mt. Everest, April, May, June, September and October are good choices for you, as you are likely to see the golden summit clearly. In Tibet, the weather condition can influence your travel experience a lot. If you are going to have a kora tour to Mt. Kailash, September and October are the best months to go. Not only can you make your trekking tour easier with the best weather all year round, but also get wonderful photographs of North Tibet in Autumn.
Have plan the trip to Tibet, travelers need more information about weather and climate in Tibet and can prepare clothing and other necessary packaging accordingly.
The weather is beginning to warm up but the temperature is still low because the ice starts to melt, so a long-sleeve shirt, warm sweater and jacket are needed.
Summer: June - Aug
It's Tibet tourism golden time during this 3 months, many kinds of festivals are holding in Tibet such as Ganden Thangka Festival, Shoton Festival and Nagqu Horse Racing Festival, you could still enjoy watching the cleanest view of Mt.Everest and the true face of Mt.Kailash. Summer T-shirt, a long-sleeve coat, sunglasses and skin protection are necessary
The weather is most comfortable with sunshine in the day during these two months, the landscape is most beautiful as well. Bring the clothes similar to Spring would be okay.
Winter: Nov - Feb
It's considered as tourism low season in Tibet, the weather is getting dry and windy, because of the weather condition and fewer travelers choose to travel to Tibet in winter, but less crowded and tour price would be cheaper than other months, you still could join the Tibetan New Year (between Jan and February ) and the streets will be colorfully decorated for this. Warm sweaters and down jackets are needed, comfortable sporting shoes are highly recommended for all weather.