October and November
Go nowJust after the rains: green, clear and dry
The best window of the year by a wide margin. The rains have stopped, the whole country is green, the air is washed clean and the roads have dried out. Meskel, a major Orthodox festival with bonfires, falls in late September and spills into this window. Book ahead: this is high season and everyone else knows it too.
January and February
Go nowDry, clear and comfortable
The heart of the dry season: reliable weather, cold nights, and the historic north at its most accessible. Ethiopian Christmas falls in early January and Timkat, the Epiphany celebration, in mid-January — the latter is one of the most spectacular religious festivals in Africa and fills Gondar and Lalibela completely. Plan around it either way.
December
Worth it, butDry and busy, with prices rising
Firmly dry and pleasant, with the international holiday season pushing up flights and hotels towards the end of the month. The dust is beginning to build after two months without rain, which affects the light and the views. Good conditions, ordinary value.
March
Worth it, butWarm, dusty, with the short rains starting
The hottest and dustiest stretch before the belg rains arrive, with hazy views over the city. The short rains usually begin late in the month and are much lighter than the long ones, mostly afternoon showers. Prices are low and it works, with a caveat on visibility.
September
Worth it, butThe rains end, and the year begins
The long rains taper off through the month and the country is at its greenest. Ethiopian New Year falls in September and Meskel at the end of it, both major celebrations. The first half can still be very wet and the second is often excellent — a gamble that usually pays off.
April and May
Think twiceThe short rains, and the heat before the long ones
Warm, damp and increasingly unsettled as the belg rains run and the long rains approach. Easter falls here — the Orthodox date is calculated differently and usually lands after the Western one — and the preceding fast is the longest of the year. Cheap and workable, and not the country at its best.
June, July and August
Think twiceKiremt: a genuine rainy season, not a shower pattern
Heavy, frequent rain for three months, with unpaved roads difficult or impassable and trekking routes closed. A city stay is grey and muddy rather than ruined, but anything beyond Addis becomes unreliable. Cheapest of the year and the landscape is spectacular — from a vehicle, on a paved road, in between downpours.