Lashio Lashio (;) is the largest town in northern Shan State, Myanmar, situated on a low mountain spur overlooking the valley of the Nam Yao river. The population, which in 1960 counted some 5000 souls, is made up of mostly Bamar (Burmans), Shan and Chinese. The annual rainfall averages 54 in. The average maximum temperature is 80.5° and the average minimum 55.5°.