Weather will likely play an important role when you plan your trip to Changtang, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 27°C, while the coldest months are January and December, with an average of 14°C. The rainiest months in Changtang are June, May, April and July, with each month seeing an average of 378 mm of rainfall.