Ethiopia’s climate varies dramatically depending on elevation, ranging from cool and mild in the highlands to scorching hot in the lowlands. The country sits near the equator, but altitude is the dominant factor shaping temperatures and rainfall. Annual precipitation can be as low as 300 mm in the arid southeastern and northwestern lowlands or exceed 2,000 mm in the southwestern highlands. This means Ethiopia effectively contains multiple climates within its borders.
How Elevation Shapes Temperature
Ethiopia’s traditional climate classification is built around altitude rather than latitude. The system divides the country into three main zones (with two more extreme zones at the edges). The warm lowlands, called Kolla, sit between 500 and 1,500 meters and are hot and semi-arid. The middle highlands, known as Woina Dega, range from 1,500 to 2,300 meters and have a cool, subhumid climate. The upper highlands, called Dega, span 2,300 to 3,200 meters and are cool to cold and humid. Above Dega, the Wurch zone covers the highest peaks, where temperatures can drop below freezing. Below Kolla, the Berha zone encompasses the harshest desert lowlands.
This elevation effect is why Addis Ababa, the capital, feels nothing like the lowland deserts just a few hundred kilometers away. Sitting at roughly 2,400 meters, the city enjoys remarkably mild weather year-round. Average highs hover between 22°C and 23°C (about 71–74°F) across all twelve months, while lows dip to around 9–13°C (48–55°F). Humidity is essentially a non-factor: Addis Ababa registers virtually zero muggy days throughout the entire year.
At the other extreme, the Danakil Depression in northeastern Ethiopia is one of the hottest places on Earth. It sits well below sea level, and average temperatures reach about 34.4°C (94°F), with peaks exceeding 48°C (118°F).
Three Seasons, One Driving Force
Ethiopia’s year breaks into three seasons, all driven by the north-south migration of the Inter-Tropical Convergence Zone (ITCZ), a belt of low pressure near the equator where trade winds meet and generate rainfall.
Kiremt, the main rainy season, runs from June through September. It delivers 50 to 80 percent of the country’s total annual rainfall in just four months, making it the lifeline for agriculture. The rains are heaviest in the western and central highlands.
Belg, the short rainy season, falls between February and May. It brings lighter, less predictable rainfall and is important for soil preparation and early planting. Recent research shows that Belg rainfall has been declining over time, while Kiremt rainfall has been increasing in parts of the northeastern highlands by as much as 55 to 89 mm per decade.
Bega, the dry season, covers October through January (sometimes extending into early February). Skies are clear, temperatures are moderate, and this is the period most visitors target. The dry conditions also make roads in remote areas more passable.
Rainfall Differences Across Regions
The southwestern highlands are Ethiopia’s wettest region, receiving over 2,000 mm of rain per year. This dense moisture supports thick forests, including the wild Arabica coffee that originated in this part of the world. Moving east and north, rainfall drops sharply. The southeastern lowlands bordering Somalia and the Afar region in the northeast receive less than 300 mm annually, creating arid scrubland and desert.
The Rift Valley, which cuts through the center of the country, has its own pattern. It follows a similar rainy season to the northern circuit but tends to be drier overall, with a string of lakes fed by highland runoff rather than local rainfall. The Omo Valley in the far south flips the script: its brief rains arrive in April and May, and June through September is actually one of the better windows to visit, even though the northern highlands are soaked during those months.
Climate Change Is Already Visible
Ethiopia’s temperatures have been rising steadily. In Addis Ababa, both maximum and minimum temperatures increased by 0.2 to 0.4°C per decade between 1951 and 2002. The warming accelerated after that: between 1981 and 2018, maximum temperatures in the capital rose by a total of about 2.7°C. The city has also experienced more dry years than wet years over recent decades, with 65 percent of years since mid-century classified as warming years based on minimum temperature data.
These shifts have real consequences. Rising temperatures and changing rainfall patterns are pushing suitable coffee-growing areas to higher elevations. Coffee production in the lowlands is declining while highland production expands. Diseases that affect coffee plants are spreading more easily in warmer conditions, and extreme weather events are becoming more frequent.
Best Months for Travel
October through March is the most reliable window for visiting most of Ethiopia. Rainfall is minimal across the northern circuit (Addis Ababa, Lalibela, Gondar, the Simien Mountains, Axum), skies are clear, and temperatures in the highlands are comfortable. April and early May can also work before the Kiremt rains begin in earnest.
The Danakil Depression is best visited between October and May. June through September brings the most extreme heat, making an already punishing environment genuinely dangerous. The Omo Valley, by contrast, is one of the few regions where June through September works well, since its own rainy season ends in May. Avoid March through May for the Omo, when rains and mud make travel difficult.
The Rift Valley and Bale Mountains follow the same general October-to-March pattern as the north, with the long rains arriving from June through early September. If you’re combining multiple regions in one trip, October and November offer the best overlap: the Kiremt rains have just ended, the landscape is green, and nearly every part of the country is accessible.