Cambodia weather in September 2025

Expect daytime maximum temperatures of 31°C in Cambodia in September and very high heat and humidity based on long-term weather averages. There are 5 hours of sunshine per day on average with 19 days with some rainfall and typically 245 mm of rainfall in the month.

  • 31°C maximum daytime temperature in September in Cambodia (Phnom Penh)31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 19 days with some rainfall in September in Cambodia (Phnom Penh)19
    19 days with some rainfall
  • 24°C minimum night-time temperature in September in Cambodia (Phnom Penh)24
    24°C min night temperature
  • 12 hours of daylight per day in September in Cambodia (Phnom Penh)12
    12 hours of daylight per day
  • Very high heat & humidity in September in Cambodia (Phnom Penh)VH
    Very High heat & humidity
  • 245 mm monthly rainfall in September in Cambodia (Phnom Penh)245
    245 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Cambodia (Phnom Penh)11
    11+ (Extreme) UV index

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The September weather guide for Cambodia (Phnom Penh) 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.

Top Cambodia destinations

Below are average maximum temperatures at popular countries, regions and places in Cambodia in September. Select a holiday destination to see more weather parameters.

All Cambodia destinations

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

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More about Cambodia

How hot is it in Cambodia in September?

Daytime temperatures usually reach 31°C in Phnom Penh, Cambodia in September with very high heat and humidity, falling to 24°C at night.

How sunny is it in Cambodia in September?

There are normally 5 hours of bright sunshine each day in Phnom Penh, Cambodia in September - that's 41% of daylight hours.

Does it rain in Cambodia in September?

There are usually 19 days with some rain in Phnom Penh, Cambodia in September and the average monthly rainfall is 245mm.

Cambodia September sunrise & sunset times

Browse the sunrise and sunset times for Cambodia in September 2025. Select a month to view Cambodia sunrise and sunset times for the next 12 months. The Cambodia sunrise and sunset times shown below are for Phnom Penh.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 18:10
Monday, 15th September 2025 05:50 18:01
Tuesday, 30th September 2025 05:49 17:51

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