Myanmar has a tropical climate, with the southwest monsoon bringing rain from May to October. Roads can become impassable, particularly from July to September. The central plains, however, receive only a fraction of the rain seen on the coast and in the Ayeyarwady delta. From October onwards the rains subside; the best time to visit most of Myanmar is from November to February, when temperatures are relatively manageable. From March to May, the country becomes very hot, particularly the dry zone of the central plains where Bagan and Mandalay often see temperatures in excess of 40°C.