Weather will likely play an important role when you plan your trip to Dessie, and keep 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 temp of 63°F, while the coldest months are December and November with an average of 57°F. The rainiest months in Dessie are August, July, April, and September, with each month seeing an average of 9 inches of rainfall.