Weather is probably a major factor when you plan your trip to Ambalavao, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually November and December, with an average temperature of 20°C, while the coldest months are July and August, with an average of 15°C. The rainiest months in Ambalavao are January, December, February and March, with each month seeing an average of 278 mm of rainfall.