Siemreab weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Siemreab in September. Check more long-term weather averages for Siemreab in September before you book your next holiday to Cambodia in 2025/2026.

  • 31°C maximum daytime temperature in September in Siemreab31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 18 days with some rainfall in September in Siemreab18
    18 days with some rainfall
  • 24°C minimum night-time temperature in September in Siemreab24
    24°C min night temperature
  • 12 hours of daylight per day in September in Siemreab12
    12 hours of daylight per day
  • Very high heat & humidity in September in SiemreabVH
    Very High heat & humidity
  • 250 mm monthly rainfall in September in Siemreab250
    250 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Siemreab11
    11+ (Extreme) UV index

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The September weather guide for Cambodia (Siemreab) 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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How hot is it in Siemreab in September?

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

How sunny is it in Siemreab in September?

There are normally 5 hours of bright sunshine each day in Siemreab in September - that's 43% of daylight hours.

Does it rain in Siemreab in September?

There are usually 18 days with some rain in Siemreab in September and the average monthly rainfall is 250mm.

What is the chance of a typhoon in Siemreab in September?

On average less than 1 day in September in Siemreab is likely to be affected by the passage of one or more tropical storms.

Siemreab September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:53 18:16
Monday, 15th September 2025 05:54 18:06
Tuesday, 30th September 2025 05:54 17:55

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