Ruiru climate — normals and trends

Q: What is the climate of Ruiru?

Ruiru has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 19.1 °C and it receives 685 mm of precipitation per year.

Q: What is the hottest day ever recorded in Ruiru?

The hottest day measured in Ruiru between 1940 and 2025 was 16 March 2012, reaching 31.9 °C.

Q: What is the coldest day in Ruiru?

The coldest day measured in Ruiru between 1940 and 2025 was 22 August 1969, at 8.2 °C.

Q: Does it snow in Ruiru?

Almost never: Ruiru sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Ruiru warmed?

Yes: Ruiru warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ruiru?

The wettest day measured in Ruiru between 1940 and 2025 was 22 November 2019, with 74 mm of rain in 24 hours.

Q: What was the windiest day in Ruiru?

The windiest day measured in Ruiru between 1940 and 2025 was 7 February 1953, with winds reaching 25.7 km/h.

Q: What is the warmest month in Ruiru?

The warmest month in Ruiru is March (20.5 °C on average); the coldest is July (17.4 °C).

Q: How much does it rain in Ruiru?

Ruiru receives on average 685 mm of precipitation per year, spread over about 141 rainy days.

Q: Is it sunny in Ruiru?

Ruiru gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Ruiru (Kenya) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 19.1 °C and it receives 685 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is March (20.5 °C on average) and the coldest is July (17.4 °C). Rainfall peaks in April.

Ruiru averages 0 frost days, 2 hot days (≥ 30 °C) and 141 rainy days per year.

Ruiru has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The hottest day of the period reached 31.9 °C (on 16 March 2012) and the coldest 8.2 °C (on 22 August 1969).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

RuiruKiambu County

coords: -1.15°, 36.96°
period: 1940–2025 · 86 yrs

CsbWarm-summer MediterraneanWarmest monthMarchColdest monthJulyWettest monthAprilDriest monthSeptember

Mean daily temperature

19.1°C

Average daily high

24.5°C

Average daily low

14.7°C

Annual rainfall

685mm

Sunshine / day

10.4h

Mean relative humidity

72%

Average peak wind

14.4km/h

Seasonal range

3.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

2 d/yr

Rainy days (≥ 1 mm)

141 d/yr

Annual snowfall

0.0 cm

Average feels-like high

24.8 °C

Average feels-like low

15.0 °C

Average peak gust

33.6 km/h

Tropical nights (≥ 20 °C)

0 d/yr

Solar radiation

19.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.62 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

31.9 °C

16 March 2012

Coldest day

8.2 °C

22 August 1969

Wettest day

74 mm

22 November 2019

Windiest day

25.7 km/h

7 February 1953

Strongest gust

56.5 km/h

17 February 1975

Hottest feels-like

34.0 °C

25 February 2005

Coldest feels-like

6.5 °C

18 September 1970

Sunniest day

12.1 h

24 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	31.5 °C14 March 2025	11.4 °C6 September 2025	20.1 °C	564 mm	9
2024	31.4 °C17 March 2024	10.0 °C12 July 2024	20.3 °C	704 mm	6
2023	30.8 °C4 February 2023	10.9 °C20 August 2023	20.1 °C	562 mm	9
2022	31.5 °C16 March 2022	10.3 °C12 October 2022	19.9 °C	301 mm	14
2021	31.1 °C29 August 2021	9.6 °C27 August 2021	20.0 °C	433 mm	3
2020	29.5 °C11 February 2020	10.5 °C11 July 2020	19.9 °C	733 mm	0
2019	31.8 °C1 March 2019	11.6 °C6 August 2019	20.4 °C	1,011 mm	19
2018	30.9 °C26 February 2018	10.4 °C17 July 2018	19.6 °C	868 mm	4
2017	30.7 °C7 March 2017	12.3 °C12 January 2017	20.3 °C	383 mm	6
2016	31.7 °C29 March 2016	11.3 °C25 August 2016	19.9 °C	482 mm	5
2015	31.6 °C14 February 2015	10.5 °C16 July 2015	20.2 °C	659 mm	12
2014	29.5 °C2 February 2014	11.9 °C30 June 2014	19.8 °C	491 mm	0
2013	31.1 °C7 March 2013	9.8 °C27 August 2013	19.5 °C	675 mm	7
2012	31.9 °C16 March 2012	10.2 °C2 January 2012	19.8 °C	617 mm	12
2011	31.4 °C11 February 2011	10.8 °C12 July 2011	20.0 °C	503 mm	7
2010	30.4 °C2 February 2010	11.4 °C16 August 2010	19.6 °C	592 mm	1
2009	31.2 °C22 March 2009	11.0 °C10 August 2009	20.0 °C	348 mm	3
2008	30.4 °C18 March 2008	9.2 °C9 July 2008	19.6 °C	435 mm	1
2007	31.6 °C23 February 2007	11.3 °C25 August 2007	19.6 °C	445 mm	10
2006	30.5 °C23 February 2006	10.2 °C20 August 2006	19.5 °C	724 mm	1
2005	31.8 °C25 February 2005	9.3 °C30 August 2005	19.7 °C	509 mm	8
2004	29.8 °C5 March 2004	10.4 °C3 July 2004	19.5 °C	443 mm	0
2003	30.4 °C23 February 2003	10.9 °C8 August 2003	19.5 °C	587 mm	2
2002	29.6 °C11 February 2002	9.4 °C23 July 2002	19.3 °C	611 mm	0
2001	29.9 °C4 March 2001	10.9 °C7 August 2001	19.2 °C	559 mm	0
2000	30.6 °C27 February 2000	10.5 °C27 January 2000	19.3 °C	274 mm	3
1999	30.5 °C10 February 1999	10.8 °C5 July 1999	19.1 °C	517 mm	1
1998	29.2 °C31 March 1998	11.2 °C8 August 1998	19.1 °C	756 mm	0
1997	30.4 °C23 February 1997	11.5 °C31 July 1997	19.5 °C	839 mm	2
1996	29.2 °C22 February 1996	10.2 °C22 September 1996	19.1 °C	591 mm	0
1995	30.2 °C1 March 1995	10.1 °C22 August 1995	19.2 °C	583 mm	1
1994	30.2 °C3 March 1994	10.3 °C24 August 1994	19.3 °C	677 mm	2
1993	29.0 °C11 March 1993	9.2 °C5 July 1993	18.7 °C	518 mm	0
1992	30.3 °C29 March 1992	9.9 °C1 August 1992	18.9 °C	510 mm	3
1991	30.7 °C23 March 1991	9.9 °C4 September 1991	19.1 °C	595 mm	4
1990	28.3 °C10 February 1990	9.6 °C27 July 1990	18.6 °C	713 mm	0
1989	29.5 °C2 March 1989	9.1 °C21 June 1989	18.5 °C	824 mm	0
1988	29.9 °C2 March 1988	10.5 °C1 September 1988	19.1 °C	784 mm	0
1987	30.1 °C14 March 1987	9.3 °C13 July 1987	19.5 °C	556 mm	1
1986	30.8 °C13 March 1986	8.9 °C26 August 1986	18.8 °C	775 mm	4
1985	28.6 °C16 February 1985	8.9 °C6 August 1985	18.5 °C	829 mm	0
1984	30.2 °C11 February 1984	10.5 °C25 June 1984	19.0 °C	647 mm	3
1983	29.3 °C10 March 1983	9.9 °C5 July 1983	19.3 °C	707 mm	0
1982	31.1 °C3 March 1982	9.4 °C19 July 1982	18.9 °C	735 mm	3
1981	30.0 °C27 February 1981	10.6 °C4 July 1981	18.9 °C	846 mm	1
1980	30.0 °C10 March 1980	9.2 °C12 August 1980	18.9 °C	673 mm	1
1979	28.2 °C4 March 1979	10.2 °C18 July 1979	18.3 °C	965 mm	0
1978	28.1 °C3 September 1978	9.1 °C4 February 1978	18.3 °C	811 mm	0
1977	28.3 °C11 February 1977	9.2 °C21 August 1977	18.6 °C	1,311 mm	0
1976	29.7 °C5 April 1976	8.9 °C19 August 1976	18.8 °C	637 mm	0
1975	30.4 °C14 March 1975	10.9 °C5 August 1975	18.8 °C	525 mm	2
1974	29.7 °C27 February 1974	9.8 °C30 July 1974	18.6 °C	703 mm	0
1973	31.6 °C17 March 1973	10.6 °C2 July 1973	19.2 °C	546 mm	3
1972	29.3 °C9 March 1972	10.9 °C28 July 1972	18.8 °C	808 mm	0
1971	30.6 °C13 February 1971	10.2 °C13 June 1971	18.5 °C	789 mm	2
1970	28.7 °C26 February 1970	8.2 °C18 September 1970	18.6 °C	665 mm	0
1969	29.0 °C4 September 1969	8.2 °C22 August 1969	18.4 °C	590 mm	0
1968	30.5 °C29 January 1968	8.9 °C20 September 1968	18.1 °C	1,070 mm	1
1967	30.3 °C24 March 1967	9.5 °C12 October 1967	18.7 °C	769 mm	2
1966	30.9 °C15 February 1966	10.5 °C24 December 1966	18.8 °C	731 mm	1
1965	28.7 °C17 February 1965	9.8 °C10 June 1965	18.5 °C	827 mm	0
1964	28.9 °C22 February 1964	8.5 °C12 August 1964	18.1 °C	953 mm	0
1963	27.2 °C23 March 1963	8.7 °C22 August 1963	18.1 °C	1,198 mm	0
1962	27.5 °C4 November 1962	9.9 °C13 August 1962	18.2 °C	761 mm	0
1961	30.0 °C28 February 1961	9.5 °C15 June 1961	19.1 °C	912 mm	1
1960	29.3 °C22 February 1960	9.4 °C26 July 1960	18.7 °C	653 mm	0
1959	30.4 °C17 March 1959	8.6 °C10 August 1959	18.9 °C	741 mm	1
1958	28.8 °C5 February 1958	9.5 °C25 September 1958	18.7 °C	733 mm	0
1957	28.4 °C2 April 1957	9.6 °C1 September 1957	18.4 °C	977 mm	0
1956	29.4 °C8 October 1956	9.5 °C29 July 1956	18.3 °C	657 mm	0
1955	27.8 °C7 March 1955	10.6 °C29 July 1955	18.5 °C	660 mm	0
1954	27.9 °C22 October 1954	9.0 °C23 June 1954	18.3 °C	813 mm	0
1953	27.7 °C10 October 1953	9.2 °C11 August 1953	17.8 °C	1,043 mm	0
1952	27.7 °C16 September 1952	9.5 °C27 June 1952	18.0 °C	988 mm	0
1951	27.9 °C1 October 1951	9.6 °C6 August 1951	18.0 °C	1,347 mm	0
1950	29.1 °C22 February 1950	9.2 °C3 June 1950	18.1 °C	909 mm	0
1949	28.9 °C8 October 1949	9.5 °C31 July 1949	18.6 °C	664 mm	0
1948	28.4 °C23 September 1948	10.6 °C5 September 1948	18.4 °C	709 mm	0
1947	27.7 °C26 September 1947	9.8 °C10 August 1947	18.2 °C	926 mm	0
1946	31.7 °C28 February 1946	10.4 °C26 August 1946	19.5 °C	376 mm	11
1945	29.3 °C23 February 1945	9.4 °C30 July 1945	18.8 °C	405 mm	0
1944	31.4 °C21 February 1944	8.6 °C6 July 1944	19.0 °C	507 mm	6
1943	29.8 °C25 January 1943	10.4 °C10 June 1943	19.1 °C	335 mm	0
1942	29.2 °C12 September 1942	9.6 °C2 August 1942	19.2 °C	323 mm	0
1941	31.5 °C27 March 1941	10.3 °C16 July 1941	19.1 °C	612 mm	5
1940	27.6 °C19 September 1940	10.4 °C29 November 1940	18.5 °C	750 mm	0

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

25.6 °C

+1.1 °C

Hot days (≥ 30 °C)

9 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

564 mm

-121 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	26.6 °C	+1.1 °C	29 mm	-8 mm
Feb	28.3 °C	+1.6 °C	3 mm	-29 mm
Mar	27.8 °C	+1.3 °C	50 mm	-20 mm
Apr	25.9 °C	+1.0 °C	124 mm	-18 mm
May	25.0 °C	+1.3 °C	112 mm	+13 mm
Jun	23.9 °C	+1.0 °C	24 mm	-7 mm
Jul	23.0 °C	+0.7 °C	13 mm	-4 mm
Aug	22.9 °C	+0.1 °C	43 mm	+28 mm
Sep	26.6 °C	+1.7 °C	8 mm	-3 mm
Oct	26.5 °C	+1.0 °C	42 mm	-4 mm
Nov	25.4 °C	+1.6 °C	34 mm	-89 mm
Dec	26.0 °C	+1.9 °C	82 mm	+19 mm

The year's extremes

Hottest day

31.5 °C

14 Mar 2025

Coldest day

11.4 °C

6 Sep 2025

Wettest day

41.9 mm

28 Dec 2025

Windiest day

24.1 km/h

15 Jan 2025

Strongest gust

52.6 km/h

22 Feb 2025

Hottest feels-like

31.2 °C

26 Oct 2025

Coldest feels-like

10.7 °C

6 Sep 2025

Sunniest day

12.0 h

23 Dec 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Ruiru?

Ruiru has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 19.1 °C and it receives 685 mm of precipitation per year.

What is the hottest day ever recorded in Ruiru?

The hottest day measured in Ruiru between 1940 and 2025 was 16 March 2012, reaching 31.9 °C.

What is the coldest day in Ruiru?

The coldest day measured in Ruiru between 1940 and 2025 was 22 August 1969, at 8.2 °C.

Does it snow in Ruiru?

Almost never: Ruiru sees virtually no snow, with about 0 frost days per year.

Has the climate of Ruiru warmed?

Yes: Ruiru warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ruiru?

The wettest day measured in Ruiru between 1940 and 2025 was 22 November 2019, with 74 mm of rain in 24 hours.

What was the windiest day in Ruiru?

The windiest day measured in Ruiru between 1940 and 2025 was 7 February 1953, with winds reaching 25.7 km/h.

What is the warmest month in Ruiru?

The warmest month in Ruiru is March (20.5 °C on average); the coldest is July (17.4 °C).

How much does it rain in Ruiru?

Ruiru receives on average 685 mm of precipitation per year, spread over about 141 rainy days.

Is it sunny in Ruiru?

Ruiru gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Ruiru?

Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ruiru.

What was the most extreme apparent temperature in Ruiru?

In Ruiru, between 1940 and 2025, the highest apparent temperature reached 34.0 °C on 25 February 2005, and the lowest was 6.5 °C on 18 September 1970.

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