The climate of Myanmar and other countries in Southeast Asia follows a monsoon pattern. During the half of the year that the sun’s rays strike directly above the equator, the landmass of Asia is heated more than in the Indian Ocean. This draws moist hot air from over the ocean onto the land, bringing the rains southwest monsoon. When the tilt of the earth brings the direct sunrays south of the equator, the heating of the Indian Ocean draws the cooler dry air of the northeast monsoon from the highlands of Asia across the countries of South and Southeast Asia. As a result, Myanmar has three seasons: the hot season, the rainy season and the cold season. The hot season runs from late February to end of May. At the end of this season, the average monthly temperature reaches over 35°C in many pars of Myanmar. The rainy season starts from the beginning of June to the early of October. By July rains have brought the average temperature down to 29°C in Mandalay and 27°C in Yangon. The cold season is from the middle of October to middle of February. Average annual rainfall varies from about 5000 mm on the coastal region to about 760 mm at Mandalay.