Siem Reap Province Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Siem Reap Province, Cambodia in September.

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Siem Reap Phumĭ Trás Treăng Phumĭ Ta Rós Phumĭ Chŭb Chănt Sâr

Considering a trip to Siem Reap Province, Cambodia this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Siem Reap Province in September

Siem Reap Province, Cambodia is a region in Cambodia. September in Siem Reap Province generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 33°C (91°F) and nighttime temperatures around 26°C (79°F) in Siem Reap. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

To learn more about the conditions in specific areas of Siem Reap Province, Cambodia, check out the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Phumĭ Trás Treăng with an average of 275 mm (11 in) to heavy rainfall in Phumĭ Chŭb Chănt Sâr with 305 mm (12 in). Going by our weather data, it is the wettest month of the year in Siem Reap.

Explore Siem Reap Province by month

Pick a month to see the average temperature, rainfall and sunshine in Siem Reap Province — and find the best time to visit. (based on Siem Reap)

January33°C (91°F) February34°C (93°F) March36°C (97°F) April36°C (97°F) May35°C (95°F) June34°C (93°F) This monthJuly33°C (91°F) August33°C (91°F) September33°C (91°F) October32°C (90°F) November32°C (90°F) December32°C (90°F)
Best Time to Visit Siem Reap Province →

Best Places to Visit in Siem Reap Province in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Siem Reap Province.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Siem Reap Province

What is the weather like in September for some of the most popular destinations in Siem Reap Province, Cambodia?

Temperature range in Siem Reap Province (September)

Precipitation variation in Siem Reap Province (September)

Siem Reap

In September Siem Reap generally has very high temperatures with maximum daytime temperatures around 33°C (91°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
33°C (91°F)
32°C (90°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly rainfall
196 mm (7.7 in)
286 mm (11 in)
220 mm (8.7 in)
Monthly rainy days
18 days
18 days
15 days
Weather conditions
unpleasant
poor
poor
Climate in Siem Reap →

Phumĭ Trás Treăng

In September Phumĭ Trás Treăng generally has very high temperatures with maximum daytime temperatures around 33°C (91°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
33°C (91°F)
33°C (91°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly rainfall
187 mm (7.4 in)
275 mm (11 in)
218 mm (8.6 in)
Monthly rainy days
18 days
18 days
15 days
Weather conditions
unpleasant
poor
poor
Climate in Phumĭ Trás Treăng →

Phumĭ Ta Rós

In September Phumĭ Ta Rós generally has very high temperatures with maximum daytime temperatures around 33°C (91°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
33°C (91°F)
33°C (91°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly rainfall
191 mm (7.5 in)
278 mm (11 in)
217 mm (8.5 in)
Monthly rainy days
18 days
18 days
15 days
Weather conditions
unpleasant
poor
poor
Climate in Phumĭ Ta Rós →

Phumĭ Chŭb Chănt Sâr

In September Phumĭ Chŭb Chănt Sâr generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
32°C (90°F)
32°C (90°F)
Min temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Monthly rainfall
219 mm (8.6 in)
305 mm (12 in)
214 mm (8.4 in)
Monthly rainy days
19 days
18 days
15 days
Weather conditions
poor
poor
poor
Climate in Phumĭ Chŭb Chănt Sâr →

Is your destination not in the list? Have a look at all destinations in Siem Reap Province, in Cambodia.

In our records: Cambodia September extremes

Notable September records observed across cities in Cambodia in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest September day in Cambodia brought 301 mm (12 in) in Sihanoukville on September 23, 2006.

Popular cities in September

Day & night temperatures, rainfall and average weather in Siem Reap Province in September.

City Weather Day temp Night temp Rainfall
Siem Reap 33°C (91°F) 26°C (79°F) 286 mm (11 in)
Phumĭ Trás Treăng 33°C (91°F) 26°C (79°F) 275 mm (11 in)
Phumĭ Ta Rós 33°C (91°F) 26°C (79°F) 278 mm (11 in)
Phumĭ Chŭb Chănt Sâr 32°C (90°F) 25°C (77°F) 305 mm (12 in)

Siem Reap Province weather in September: frequently asked questions

What is the weather like in Siem Reap Province, Cambodia in September?

In September, Siem Reap Province, Cambodia generally has poor weather conditions. Siem Reap sees daytime temperatures near 33°C (91°F), with nights cooling to roughly 26°C (79°F).

What is the average temperature in Siem Reap Province, Cambodia in September?

Average temperatures in Siem Reap Province, Cambodia during September range from a nighttime low near 26°C (79°F) to a daytime high around 33°C (91°F) in Siem Reap.

Does Siem Reap Province, Cambodia get a lot of rain in September?

Expect plenty of rainfall. Siem Reap records an average of 286 mm (11 in) in September, putting it among the wetter months for Siem Reap Province, Cambodia.

Is September a Good Time to Visit Siem Reap Province, Cambodia?

In our view, September might not be the best time to travel to Siem Reap Province, Cambodia with often poor weather in Siem Reap.

Generally speaking, the best visiting conditions can be found in December offering mostly pleasant weather in Siem Reap. On the other hand, the weather in February, March, April, May, June, July, August, September and October tend to be poor.

Interested in more climate information?

We have much more information about the climate in Siem Reap Province.

Weather and climate has detailed information for every country in the world. Are you going to Cambodia? Get detailed historical weather averages for many cities in Cambodia.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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