Weather will likely play an important role when you plan your trip to Dessie, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and May, with an average temperature of 17°C, while the coldest months are December and November, with an average of 14°C. The rainiest months in Dessie are August, July, April and September, with each month seeing an average of 233 mm of rainfall.