Mombasa weather in September 2025

Expect daytime maximum temperatures of 84°F in Mombasa, Kenya in September and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 12 days with some rainfall and typically 2.6 inches of rainfall in the month.

  • 84°F maximum daytime temperature in September in Mombasa84
    84°F max day temperature
  • 9 hours of sunshine per day
  • 12 days with some rainfall in September in Mombasa12
    12 days with some rainfall
  • 70°F minimum night-time temperature in September in Mombasa70
    70°F 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
  • 2.6 inches monthly rainfall in September in Mombasa2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Mombasa11
    11+ (Extreme) UV index
  • 77°F sea temperature in September in Mombasa77
    77°F 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)  |  Imperial (°F)

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More about Kenya

How hot is it in Mombasa in September?

Daytime temperatures usually reach 84°F in Mombasa in September with moderate heat and humidity, falling to 70°F 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 77°F.

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 2.6 inches.

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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