Weather will likely play an important role when you plan your trip to Ambo, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and February, with an average temperature of 19°C, while the coldest months are October and December, with an average of 16°C. The rainiest months in Ambo are July, August, June and September, with each month seeing an average of 219 mm of rainfall.