Lower Myanmar Lower Myanmar Lower Burma (, also called Outer Myanmar) is a geographic region of Burma (Myanmar) and includes the low-lying Irrawaddy delta (Ayeyarwady, Bago and Yangon Regions), as well as coastal regions of the country (Rakhine and Mon States and Tanintharyi Region). In the Burmese language, people originating from Upper Burma are typically called "a-htet-tha" for men and "a-hiet-lhu" for women, whereas those from Lower Burma are called "auk tha" () for men and "auk thu" for women. While "a-nya tha" () refers to interior inhabitants of the country. Historically, Lower Burma referred to the part of Burma annexed by
Yangon through October where a substantial amount of rainfall is received; and a dry season from November through April, where little rainfall is seen. It is primarily due to the heavy rainfall received during the rainy season that Yangon falls under the tropical monsoon climate category. During the course of the year 1961 to 1990s, average temperatures show little variance, with average highs ranging from and average lows ranging from . Until the mid-1990s, Yangon remained largely constrained to its traditional peninsula setting between the Bago, Yangon and Hlaing Rivers. People moved in, but little of the city moved out. Maps