As a tropical Asian monsoon country, Myanmar has many extremely different climate zones and seasonal characteristics, depending on region and sea level.
The rainy season lasts from the vend of May until mid-September (maximum precipitation in June until August); high air humidity particularly affects coastal regions, with rainfall mostly in the afternoons and evenings. Travellers can usually prepare well for these downpours. Only a few roads cannot be used at all. In Central Myanmar the climate generally remains drier, but also continuously hotter.
During the dry season, which lasts from October until May, winter is the cooler period. The best time to travel is from October until the end of March, during which time temperatures lie between 21-28 degrees. However, in the mountains (e.g. Kalaw Hill Station) there can even be frost at night.
The summer heat prevails from April/May. Depending on the region, temperatures can reach 35 degrees and over, but in the higher regions it is especially pleasant.