Mombasa weather in September 2025

Expect 29°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Mombasa in September based on long-term weather averages. There is usually 12 days with some rainfall and 66 mm of average monthly rainfall in September.

  • 29°C maximum daytime temperature in September in Mombasa29
    29°C max day temperature
  • 9 hours of sunshine per day
  • 12 days with some rainfall in September in Mombasa12
    12 days with some rainfall
  • 21°C minimum night-time temperature in September in Mombasa21
    21°C min night temperature
  • 12 hours of daylight per day in September in Mombasa12
    12 hours of daylight per day
  • Moderate heat & humidity in September in MombasaM
    Moderate heat & humidity
  • 66 mm monthly rainfall in September in Mombasa66
    66 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Mombasa11
    11+ (Extreme) UV index
  • 25°C sea temperature in September in Mombasa25
    25°C sea temperature

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The September weather guide for Kenya (Mombasa) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Kenya

How hot is it in Mombasa in September?

Daytime temperatures usually reach 29°C in Mombasa in September with moderate heat and humidity, falling to 21°C at night.

How sunny is it in Mombasa in September?

There are normally 9 hours of bright sunshine each day in Mombasa in September - that's 71% of daylight hours.

How warm is the sea around Mombasa in September?

The average sea temperature around Mombasa in September is 25°C.

Does it rain in Mombasa in September?

There are usually 12 days with some rain in Mombasa in September and the average monthly rainfall is 66mm.

Mombasa September sunrise & sunset times

Browse the sunrise and sunset times for Mombasa in September 2025. Select a month to view Mombasa sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:20 18:22
Monday, 15th September 2025 06:14 18:19
Tuesday, 30th September 2025 06:07 18:15

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