Myanmar has three distinctive seasons; namely, hot (March to May with average temperatures 30-35°C), rainy (June to October with average temperatures 25-30°C) and cool (November to February with average temperatures 20-24°C).
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 Burma averages about 890 mm (about 35 in) and in Lower Burma about 5080 mm (about 200 in).