September Weather in Ruiru, Kenya

Last updated: August 23, 2025

In Ruiru, Kenya, the average temperature in September hovers around 20°C (68°F). Daytime warmth peaks at a comfortable 29°C (85°F), while the nights can dip to a cool 11°C (52°F). Expect 24 mm (1.0 in) of precipitation spread over about 6 days, and enjoy an average humidity level of 63%.

September Temperature in Ruiru

In September in Ruiru, the average temperature is 20°C (68°F), with a maximum that can reach 29°C (85°F) and a minimum that can drop to as low as 11°C (52°F). This pleasant climate makes it an ideal time for outdoor activities and sightseeing.

September Weather in Ruiru: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Ruiru, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ruiru, September typically has an average temperature of 20°C (68°F), with highs reaching up to 29°C (85°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for Ruiru generated using information from the Copernicus Climate Change Service.

September Precipitation in Ruiru

In Ruiru in September, the precipitation amount is 24 mm (1.0 in) spread over a period of 6 days.

September Precipitation Trends in Ruiru

The chart displays monthly precipitation patterns in Ruiru, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Ruiru, September typically receives around 24 mm (1.0 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Ruiru

In Ruiru in September humidity is 63%. With an average temperature of 20°C (68°F), this humidity feels like a warm, refreshing embrace, making travel comfortable and inviting, as long as you stay hydrated and take occasional breaks in the shade.

September Average Humidity in Ruiru

This chart illustrates the average monthly humidity levels in Ruiru, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Ruiru is approximately 63%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ruiru

In Ruiru in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Ruiru, you can check here.

Maximum UV Index Levels in Ruiru for September

The chart shows the monthly maximum UV Index (UVI) for Ruiru in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Ruiru typically reaches 14, which falls under the extreme exposure category.

Data source: Ruiru September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Ruiru Compares to Other Months

Weather in Ruiru varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ruiru, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ruiru, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	31 mm (1.2 inches)	64%	extreme
February Weather	21°C (70°F)	27 mm (1.1 inches)	53%	extreme
March Weather	22°C (72°F)	82 mm (3.2 inches)	49%	extreme
April Weather	21°C (70°F)	154 mm (6.1 inches)	54%	extreme
May Weather	20°C (68°F)	105 mm (4.1 inches)	71%	extreme
June Weather	19°C (66°F)	40 mm (1.6 inches)	70%	extreme
July Weather	18°C (65°F)	15 mm (0.6 inches)	63%	extreme
August Weather	19°C (66°F)	18 mm (0.7 inches)	60%	extreme
September Weather	20°C (68°F)	24 mm (1.0 inches)	63%	extreme
October Weather	21°C (70°F)	69 mm (2.7 inches)	76%	extreme
November Weather	20°C (69°F)	128 mm (5.0 inches)	89%	extreme
December Weather	20°C (68°F)	87 mm (3.4 inches)	84%	extreme