Weather in Dar es Salaam in May

Shoulder season. May sits in between. You will get good days and you will lose some. You should expect rain on 17 days of the month, which is more days wet than dry.

May ranks 7 of 12 in Dar es Salaam: past the worst of the year but short of July, which is the month to book if the dates are open.

Rain on 17 days, 5 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 28.6 °C days and 25 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 3.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 31.8 °C and the coldest night fell to 21.7 °C, and the wettest single day dropped 75 mm — roughly 50% of the month's rain in one day.

May is moderately variable: 14 mm in the driest year against 339 mm in the wettest, around an average of 151 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind sits around 17 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 29.4 °C in April, 28.6 here, 28 in June. Nothing about the timing within the month matters much. Rain is the thing that moves: June brings 12 days less of it, so pushing the dates later buys drier weather.

Daylight in May

Dar es Salaam sits close enough to the equator that daylight barely moves all year — 11.8 hours in May, against a range of just 0.8 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 28.2 °C in May — warm enough that the water offers no relief from the heat. The sea peaks at 29.5 °C in March and bottoms out at 25.6 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

May in Dar es Salaam versus nearby

If Dar es Salaam is one option among several, the nearby comparison is worth making. Zanzibar is close enough to be a coin toss — within a degree on temperature, 3 days more rain. Mombasa is the weaker option in May — within a degree on temperature, 6 days more rain.

So: May is a compromise. July is 33 points better and is what Dar es Salaam is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Dar es Salaam

See all twelve months in Dar es Salaam, or where else to go in May.