Weather in Nairobi in May

A good month. May works. It is not the peak, but nothing about it fights you. You should expect rain on 15 days of the month, which is more days wet than dry.

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

This is persistent light rain rather than storms: 15 wet days but only 1 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C. Across the twenty years measured, the hottest May day reached 29.7 °C and the coldest night fell to 10.2 °C, and the wettest single day dropped 36 mm — roughly 49% of the month's rain in one day.

May is moderately variable: 31 mm in the driest year against 215 mm in the wettest, around an average of 73 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 8.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 75%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 27.2 °C in April, 25.8 here, 25.6 in June. Nothing about the timing within the month matters much. Rain is the thing that moves: June brings 8 days less of it, so pushing the dates later buys drier weather.

Daylight in May

Nairobi sits close enough to the equator that daylight barely moves all year — 12.1 hours in May, against a range of just 0.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 16.9 °C between the year's warmest afternoons and coldest nights. At 1684 m, altitude is doing as much work here as latitude: thinner air means fierce sun by day and heat that leaves the moment it sets.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

May in Nairobi versus nearby

If Nairobi is one option among several, the nearby comparison is worth making. Nakuru is the weaker option in May — within a degree on temperature, 8 days more rain. Kakamega is the weaker option in May — within a degree on temperature, 13 days more rain.

So: May is a compromise. July is 19 points better and is what Nairobi 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 Nairobi

See all twelve months in Nairobi, or where else to go in May.