Although it’s near the equator, much of Ethiopia’s climate is very pleasant due to the high altitude. In the Ethiopian highlands (the historic north route), temperatures average between 15˚C (60˚F) and 27˚C (80˚F). However, temperatures can get surprisingly cool at night. In the south (Omo Valley tours) temperatures can approach 32˚C (90˚F). For trekking in either the Simien Mountains or Bale Mountains, you should be prepared for cold nights so be sure to bring clothes you can “layer” on as you need them.
The rainy season for most of the country is between June and September, but showers occur periodically throughout the year.