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Monthly climate in Ruiru, Kenya

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ruiru features a oceanic climate (Cfb). Temperatures typically range between 18 °C (65 °F) and 22 °C (72 °F) through the year, but rarely can drop to 10 °C (50 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 781 mm (30.7 inches) and receives 139 rainy days on the 1 mm (0.04 inches) threshold annually. Ruiru enjoys an average of 3902 hours of sunshine throughout the year, and daylight varies from 12 hours 3 minutes to 12 hours 10 minutes per day.

Monthly average temperatures in Ruiru, Kenya

The warmest months in Ruiru are February, March and April, with daily mean temperatures ranging from 21 to 22 °C (70 - 72 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 18 to 19 °C (65 - 66 °F) throughout the day. On average each year, Ruiru experiences 190 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ruiru. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum30°C
(86°F)		31°C
(88°F)		32°C
(89°F)		31°C
(88°F)		28°C
(83°F)		27°C
(81°F)		29°C
(84°F)		31°C
(88°F)		29°C
(85°F)		30°C
(87°F)		29°C
(85°F)		28°C
(83°F)
Mean maximum29°C
(84°F)		30°C
(86°F)		31°C
(87°F)		29°C
(84°F)		27°C
(82°F)		26°C
(79°F)		26°C
(80°F)		28°C
(83°F)		29°C
(84°F)		29°C
(85°F)		28°C
(82°F)		27°C
(81°F)
Average high26°C
(80°F)		27°C
(81°F)		28°C
(82°F)		26°C
(79°F)		25°C
(77°F)		23°C
(75°F)		23°C
(74°F)		24°C
(76°F)		25°C
(78°F)		26°C
(80°F)		25°C
(78°F)		25°C
(77°F)
Daily mean20°C
(69°F)		21°C
(70°F)		22°C
(72°F)		21°C
(70°F)		20°C
(68°F)		19°C
(66°F)		18°C
(65°F)		19°C
(66°F)		20°C
(68°F)		21°C
(70°F)		20°C
(69°F)		20°C
(68°F)
Average low15°C
(60°F)		16°C
(61°F)		17°C
(63°F)		17°C
(63°F)		17°C
(62°F)		15°C
(60°F)		15°C
(58°F)		14°C
(58°F)		15°C
(59°F)		16°C
(62°F)		16°C
(62°F)		16°C
(61°F)
Mean minimum13°C
(56°F)		13°C
(57°F)		15°C
(59°F)		16°C
(61°F)		14°C
(58°F)		14°C
(57°F)		12°C
(54°F)		11°C
(52°F)		12°C
(54°F)		14°C
(57°F)		14°C
(58°F)		14°C
(57°F)
Minimum12°C
(54°F)		13°C
(55°F)		14°C
(58°F)		15°C
(60°F)		13°C
(56°F)		12°C
(53°F)		10°C
(51°F)		10°C
(50°F)		11°C
(52°F)		12°C
(55°F)		12°C
(55°F)		12°C
(54°F)

Compare climate in Ruiru with other places

Compare temperature, precipitation, sunshine, UV index in Ruiru, Kenya with other places around the world.

Monthly average precipitation in Ruiru, Kenya

Ruiru usually has the most precipitation in April, May and November, with an average of 21 rainy days and 129 mm (5.1 inches) of precipitation per month. The driest months in Ruiru are July, August and September. On average, 19 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ruiru. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)31 (1.2)27 (1.1)82 (3.2)154 (6.1)105 (4.1)40 (1.6)15 (0.6)18 (0.7)24 (1.0)69 (2.7)128 (5.0)87 (3.4)
Average precipitation days (≥ 1 mm)681426196356121915

Monthly sunshine hours in Ruiru, Kenya

The sunniest months in Ruiru are March, October and December, when the sun shines an average of 11 hours 2 minutes a day. Least sunny months in Ruiru: January, February and April receive an average of 10 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ruiru. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours289312339313335316318330329342329344
Mean daily daylight hours12h 9m12h 8m12h 5m12h 4m12h 3m12h 3m12h 3m12h 3m12h 5m12h 7m12h 9m12h 10m

Solar UV radiation in Ruiru, Kenya

Ruiru experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 16 - 16, which corresponds to the Extreme category of sun exposure. June, July and November are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Ruiru UV Index data.

Average daily maximum UV levels by month for Ruiru. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151616161311111314141313