Most of Myanmar lies within the Tropic Zone. The hot season extends from March through October, and the cool season, the period of the Northeast Monsoon, from November through February. Temperatures from the cool to hot seasons range from 17° to 40° C (62° to 104° F) in Lower Myanmar and from less than 17°C (62°F) to more than 40° C (104° F) in Upper Myanmar. Temperatures are generally lower in mountainous regions. The country receives practically all its rainfall between mid-May and October, the period of the Southwest Monsoon. Annual precipitation in most of Upper Myanmar averages about 890 mm (about 35 in) and in Lower Myanmar about 5080 mm (about 200 in).