Siem Reap Weather in September

What's the weather like in Siem Reap (Siem Reap) in September 2023?

The climate in Siem Reap during September can be summarized as hot, humid and very wet.

September is in the fall / autumn in Siem Reap and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 24°C (75°F) is normal.

Siem Reap weather averages (imperial / metric)
Daytime temperature 31.3°C 88.3°F
Nightly temperature 24°C 75.1°F
Average temperature 27.6°C 81.7°F
Daily sunshine 5.6 hrs
Avg rainfall 250 mm 9.8 ins
Rainy days 18 days
Sea temperature 29°C 84.3°F
Humidity 84%
Windspeed 5kph 3 mph

On average September is the wettest month of the year in Siem Reap with around 250mm 9.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.6 hours of sunshine per day.

September temperatures in Siem Reap

Siem Reap average temperature in September

September rainfall

Siem Reap average rain in September

September hourly sunshine

Siem Reap average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Siem Reap in September 2023.

Other monthly averages

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Siem Reap weather stats

Siem Reap weather statistics
Hottest month: April 35.7°C 96.3°F
Driest month: January 1mm 0ins
Sunniest month: January 9.6hrs
Coldest month: December 30.1°C 86.2°F
Wettest month: September 250mm 9.8ins
Map showing location of Siem Reap (13.36179, 103.86056)

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