Djibouti month by month — at a glance
Hover each month for the summary. Click to pin it.
01 Ten degrees of low
Key moments at a glance
29.2 °C high, 21.8 low and the sea at 26. Nothing improves on this.
31.2 and 23.3 °C, and the whale shark gathering begins.
33.7 °C: four below September. The month when the year switches halves.
A high of 42.1 °C and nights that never drop below 31. No hour offers relief.
The 1991-2020 series draws a curve with no surprises and no half measures. From December to March mean highs move between 29.2 and 30.7 degrees. From June to September, between 38.0 and 42.1. Between those two blocks there are two transition months — April and May on one side, October on the other — and nothing else. The year does not degrade gradually: it changes regime.
The city's all-time record is 45.9 degrees, reached in June and in July. But the figure that really describes the summer is not that peak: it is that July's mean low, 31.4 degrees, is higher than January's mean high, 29.2. Put another way, the coolest night of an ordinary July is hotter than the hottest day of an ordinary January.
02 The four months
The useful window runs from November to February. November records 31.2 and 23.3 degrees; December, 29.7 and 22.2; January, 29.2 and 21.8; February, 29.4 and 22.4. These are four months in which midday is still hot — thirty degrees is not nothing — but early morning and night are perfectly comfortable, and that hands the traveller back two thirds of the day.
July's mean low, 31.4 degrees, is higher than January's mean high, 29.2. The summer night here is hotter than the winter day.
The sea plays along. In January the water sits at 26 degrees: warm enough to swim comfortably and cool enough to actually cool you down. In June it climbs to 31, the temperature of a lukewarm bath, and relieves nothing. It is the same logic that governs on land: in the cool half of the year the surroundings take heat away from the body, and in the hot half they stop doing so.
03 What rises from below
The cool half of the year is not only more comfortable: it is the only one in which the most singular thing on the Djiboutian calendar happens. Between November and February, upwellings of deep water close to the coast drive up productivity in the Gulf of Tadjoura and set off a bloom of zooplankton. And behind the plankton comes whatever eats it.
Whale sharks gather in the gulf every year between November and February, predictably, in tightly localised coastal areas. It is an aggregation of juveniles — the vast majority young males — and of animals noticeably smaller than those in most other coastal aggregations in the world. Annual counts since 2003 have recorded up to 181 individuals in a single season.
The calendar therefore lines up on its own. The four months in which the climate lets you be here are exactly the four months in which the gulf fills up. There is no trade-off between temperature and reason to travel: in Djibouti they coincide.
04 The desert wind
To the summer heat you have to add a second factor that does not show up in temperature tables. Between June and August the khamsin blows, a hot dry wind coming down off the desert loaded with dust and sand, cutting visibility. It usually picks up in the early afternoon and eases between the end of the day and midnight, though it sometimes settles in for three or four days at a stretch.
Its practical effect is twofold. It kills landscape photography, because the air stops being transparent and the horizon disappears into a brown haze. And it argues against long road trips, which are precisely why people come here. In summer, the city is not only hotter: it is also more cut off from what surrounds it.
The conclusion is about as clear-cut as anything you can write about a destination. January and February are the two best months; December and November come right behind and add the gulf season. October and March work if there is no alternative. And from May to September it is not a question of being uncomfortable: it is that the mean low never drops under 27 degrees and the trip loses the point it had.
