Weather and climate in Nairobi, Kenya: monthly averages and best time for stargazing

Best for stargazingFeb, Jan, SepMost clear, dark hours

Warmest monthFebruaryAverage high 29°C

Coolest monthJulyAverage low 12°C

Wettest monthApril114 mm on average

What the weather is like in Nairobi

The warmest month in Nairobi is February, with average highs of 29°C. The coolest is July, when nights average 12°C. About 602 mm of rain and snow falls in a typical year, most in April and least in July.

Skies are clearest in February (51% average cloud cover) and cloudiest in April (73%). Combining cloud with the length of truly dark nights, February, January, September offer the most clear, dark hours for stargazing.

Clear, dark hours per night

4.6 Jan

4.7 Feb

4.0 Mar

2.6 Apr

2.9 May

2.9 Jun

3.2 Jul

3.2 Aug

4.1 Sep

3.4 Oct

3.1 Nov

4.0 Dec

Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.

Monthly averages

Month	High	Low	Precipitation	Cloud cover	Humidity	Wind	Dark hours
January	27°C	14°C	39 mm	51%	63%	12 km/h	9.4 h
February	29°C	14°C	29 mm	51%	59%	12 km/h	9.5 h
March	29°C	15°C	64 mm	58%	63%	12 km/h	9.6 h
April	26°C	15°C	114 mm	73%	73%	10 km/h	9.6 h
May	25°C	13°C	73 mm	70%	75%	9 km/h	9.5 h
June	25°C	12°C	25 mm	70%	70%	8 km/h	9.5 h
July	26°C	12°C	16 mm	67%	64%	8 km/h	9.5 h
August	26°C	12°C	22 mm	67%	63%	10 km/h	9.6 h
September	28°C	13°C	20 mm	57%	59%	11 km/h	9.6 h
October	28°C	14°C	53 mm	64%	62%	13 km/h	9.5 h
November	26°C	14°C	81 mm	67%	73%	13 km/h	9.4 h
December	26°C	14°C	65 mm	57%	71%	13 km/h	9.3 h

Climate averages: NASA POWER, 2001–2025, for the grid area around -1.50, 36.88 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Sources and methods.