Ruiru climate

Name: Ruiru
Address: KE

Ruiru is warmest in February, with average highs of 27 °C, and coldest in July, when nights average 12 °C. November is the wettest month (131 mm) and July the driest (10 mm). Figures are 1991–2020 climate normals.

Across a full year Ruiru averages 648 mm of rain and 119 days above 25 °C.

Kenya · population 490,120 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 27 °C
Coldest month July 12 °C
Driest month July 10 mm
Wettest month November 131 mm
Least cloud February 53 % cloud
Hottest on record March 32 °C
Coldest on record July 8.4 °C

What to expectRuiru through the year

Ruiru has a clear annual cycle: average daily highs run from 22 °C in July to 27 °C in February, a swing of 3.3 °C in mean temperature across the year.

Counted across a normal year, 119 days a year reach 25 °C, 2 of them reach 30 °C. The warmest reading in the 1991–2020 record is 32 °C, in March.

Rain is strongly seasonal. November averages 131 mm against 10 mm in July — 13 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	25.2 °C	33 mm	53 %
February	26.7 °C	28 mm	53 %
March	26.5 °C	64 mm	61 %
April	24.4 °C	127 mm	76 %
May	23.3 °C	79 mm	71 %
June	22.3 °C	28 mm	77 %
July	21.8 °C	10 mm	78 %
August	22.4 °C	15 mm	76 %
September	24.4 °C	12 mm	63 %
October	25.0 °C	58 mm	68 %
November	23.0 °C	131 mm	78 %
December	23.5 °C	63 mm	63 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	25.2 °C	13.7 °C	19.2 °C	30.2 °C	9.4 °C	17	0
February	26.7 °C	14.1 °C	20.2 °C	31.4 °C	10.2 °C	24	0
March	26.5 °C	15.1 °C	20.3 °C	32.2 °C	11.2 °C	24	1
April	24.4 °C	15.7 °C	19.3 °C	30.2 °C	12.4 °C	9	0
May	23.3 °C	14.8 °C	18.6 °C	27.7 °C	9.8 °C	2	0
June	22.3 °C	13.4 °C	17.7 °C	26.6 °C	9.6 °C	1	0
July	21.8 °C	12.3 °C	17.0 °C	27.7 °C	8.4 °C	2	0
August	22.4 °C	12.6 °C	17.3 °C	27.1 °C	8.4 °C	3	0
September	24.4 °C	13.2 °C	18.5 °C	30.4 °C	9.2 °C	13	0
October	25.0 °C	14.5 °C	19.2 °C	30.8 °C	11.0 °C	16	0
November	23.0 °C	14.7 °C	18.2 °C	27.5 °C	11.1 °C	2	0
December	23.5 °C	14.0 °C	18.3 °C	27.9 °C	10.2 °C	5	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	33 mm	7	12 h/day	53 %	69 %	17 km/h
February	28 mm	5	12 h/day	53 %	63 %	17 km/h
March	64 mm	13	12 h/day	61 %	67 %	17 km/h
April	127 mm	22	12 h/day	76 %	79 %	14 km/h
May	79 mm	15	12 h/day	71 %	79 %	12 km/h
June	28 mm	6	12 h/day	77 %	75 %	11 km/h
July	10 mm	2	12 h/day	78 %	71 %	11 km/h
August	15 mm	3	12 h/day	76 %	70 %	12 km/h
September	12 mm	2	12 h/day	63 %	65 %	14 km/h
October	58 mm	10	12 h/day	68 %	68 %	15 km/h
November	131 mm	22	12 h/day	78 %	82 %	15 km/h
December	63 mm	14	12 h/day	63 %	78 %	16 km/h

How Ruiru compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Ruiru	27 °C	12 °C	648 mm	119
Thika · Kenya	27 °C	13 °C	963 mm	119
Nairobi · Kenya	27 °C	12 °C	656 mm	124
Karuri · Kenya	25 °C	11 °C	691 mm	32
Kikuyu · Kenya	25 °C	11 °C	639 mm	31
Ongata Rongai · Kenya	26 °C	12 °C	570 mm	95
Limuru · Kenya	23 °C	9.0 °C	849 mm	9

Planning a trip? See the best time to visit Ruiru.

QuestionsCommon questions about Ruiru’s climate

When is the best time to visit Ruiru?

That depends on what you want, so the honest answer is a comparison rather than a single month. February, March, April sit closest to 20 °C on average, February is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Ruiru get?

In February, the warmest month, daily highs average 27 °C. About 2 days a year pass 30 °C. The highest value in the 1991–2020 record is 32 °C.

How cold does it get in winter?

Nights average 12 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Ruiru?

November, averaging 131 mm over 22 days with rain. The driest month is July with 10 mm. The year as a whole averages 648 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Ruiru rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.