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September Weather in Mumias, Kenya

Last updated: August 23, 2025

In Mumias, Kenya, the average temperature in September hovers around 21°C (71°F). Expect a comfortable range, with a minimum of 15°C (59°F) and a maximum of 31°C (88°F). However, be prepared for a moist climate, as precipitation amounts to 166 mm (6.5 in) over approximately 26 days. With an average humidity of 86%, it's a good idea to embrace the charm of this welcoming atmosphere!

September Temperature in Mumias

In September in Mumias, the average temperature is 21°C (71°F), with maximums reaching 31°C (88°F) and minimums dropping as low as 15°C (59°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Mumias, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mumias, September typically has an average temperature of 21°C (71°F), with highs reaching up to 31°C (88°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec737473727170697071717272
Data source: Temperature data for Mumias generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Mumias

In Mumias in September, the precipitation amount is 166 mm (6.5 in) over the course of 26 days.

September Precipitation Trends in Mumias

The chart displays monthly precipitation patterns in Mumias, 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 Mumias, September typically receives around 166 mm (6.5 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec9192180263267147133156166219178142
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mumias

In Mumias in September, humidity is 86%. With an average temperature of 21°C (71°F), this humidity feels like a warm, dense blanket wrapping around you, making outdoor activities feel slightly stifling and requiring frequent breaks for hydration.

September Average Humidity in Mumias

This chart illustrates the average monthly humidity levels in Mumias, 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 Mumias is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%52%46%56%83%83%83%84%86%89%90%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mumias

In Mumias in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Mumias.

Maximum UV Index Levels in Mumias for September

The chart shows the monthly maximum UV Index (UVI) for Mumias 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 Mumias typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516151311111313131312
Data source: Mumias 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 Mumias Compares to Other Months

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

This table compares monthly weather conditions in Mumias, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)91 mm (3.6 inches)59%extreme
February Weather23°C (74°F)92 mm (3.6 inches)52%extreme
March Weather23°C (73°F)180 mm (7.1 inches)46%extreme
April Weather22°C (72°F)262 mm (10.3 inches)56%extreme
May Weather22°C (71°F)267 mm (10.5 inches)83%extreme
June Weather21°C (70°F)147 mm (5.8 inches)83%extreme
July Weather21°C (70°F)133 mm (5.2 inches)83%extreme
August Weather21°C (70°F)156 mm (6.1 inches)84%extreme
September Weather21°C (71°F)166 mm (6.5 inches)86%extreme
October Weather22°C (71°F)219 mm (8.6 inches)89%extreme
November Weather22°C (72°F)178 mm (7.0 inches)90%extreme
December Weather22°C (72°F)142 mm (5.6 inches)82%extreme

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