Kampot

Cambodia Weather in September

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

🔎
Siem Reap Phnom Penh Sihanoukville Kampot

Planning a getaway to Cambodia this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Cambodia in September

September in Cambodia generally has temperatures that range from warm to very warm, with heavy precipitation.

Temperatures

During the day the temperature is warm in Koh Rong Island at 29°C (84°F) and very warm in Battambang at 34°C (93°F). As night falls, temperatures generally drop to 26°C (79°F) in Battambang and 26°C (79°F) in Koh Rong Island. The temperatures mentioned for daytime and nighttime are general averages. However there can be days that surpass these temperatures. So equip yourself with clothing that can handle the potential heat.

For specific regional insights in Cambodia, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Kampong Speu with an average of 222 mm (8.7 in) to heavy rainfall in Sihanoukville with 571 mm (22 in). It experiences its highest rainfall in this month of the year. Come prepared by bringing an umbrella.

Explore Cambodia by month

Pick a month to see the average temperature, rainfall and sunshine in Cambodia — 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 Cambodia →

Best Places to Visit in Cambodia in September

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

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 Cambodia

What is the weather like in September for some of the most popular destinations in Cambodia?

Temperature range in Cambodia (September)

Precipitation variation in Cambodia (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 →

Phnom Penh

In September Phnom Penh generally has very high temperatures with maximum daytime temperatures around 33°C (91°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
34°C (93°F)
33°C (91°F)
33°C (91°F)
Min temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
175 hours
129 hours
205 hours
Monthly rainfall
172 mm (6.8 in)
252 mm (9.9 in)
247 mm (9.7 in)
Monthly rainy days
17 days
19 days
17 days
Weather conditions
unpleasant
poor
poor
Climate in Phnom Penh →

Sihanoukville

In September Sihanoukville generally has high temperatures with maximum daytime temperatures around 29°C (84°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
30°C (86°F)
29°C (84°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
167 hours
148 hours
201 hours
Monthly rainfall
572 mm (23 in)
571 mm (22 in)
328 mm (13 in)
Monthly rainy days
21 days
21 days
19 days
Weather conditions
poor
poor
poor
Climate in Sihanoukville →

Kampot

In September Kampot generally has high temperatures with maximum daytime temperatures around 30°C (86°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
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
167 hours
148 hours
201 hours
Monthly rainfall
269 mm (11 in)
304 mm (12 in)
271 mm (11 in)
Monthly rainy days
19 days
20 days
19 days
Weather conditions
poor
poor
poor
Climate in Kampot →

Battambang

In September Battambang generally has very high temperatures with maximum daytime temperatures around 34°C (93°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
35°C (95°F)
34°C (93°F)
33°C (91°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly rainfall
150 mm (5.9 in)
232 mm (9.1 in)
208 mm (8.2 in)
Monthly rainy days
17 days
17 days
15 days
Weather conditions
poor
poor
poor
Climate in Battambang →

Is your destination not in the list? Have a look at all destinations 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 Cambodia in September.

City Weather Day temp Night temp Rainfall
Siem Reap 33°C (91°F) 26°C (79°F) 286 mm (11 in)
Phnom Penh 33°C (91°F) 25°C (77°F) 252 mm (9.9 in)
Sihanoukville 29°C (84°F) 26°C (79°F) 571 mm (22 in)
Kampot 30°C (86°F) 25°C (77°F) 304 mm (12 in)
Sen Monorom 29°C (84°F) 22°C (72°F) 330 mm (13 in)
Banlung 31°C (88°F) 24°C (75°F) 400 mm (16 in)

Cambodia weather in September: frequently asked questions

What is the weather like in Cambodia in September?

Expect poor weather across Cambodia in September. The popular destination of Siem Reap averages 33°C (91°F) by day and 26°C (79°F) at night during this month.

What is the average temperature in Cambodia in September?

Daytime temperatures in Siem Reap peak at roughly 33°C (91°F) in September, dropping to about 26°C (79°F) overnight.

Does Cambodia get a lot of rain in September?

Rainfall in Cambodia peaks during September. Siem Reap averages roughly 286 mm (11 in), so frequent and sometimes heavy showers are the norm.

Is September a Good Time to Visit Cambodia?

In our opinion, September may not be the ideal time to visit Cambodia due to the typically poor weather in Siem Reap.

Generally speaking, December provides pleasant weather in Siem Reap. On the other hand, the months of February, March, April, May, June, July, August, September and October tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Cambodia.

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.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

10 Hidden gems in Asia you need to visit

Explore 10 hidden gems in Asia offering authentic experiences, from pristine beaches and remote islands to cultural treks and peaceful mountain villages.
Staying in an artwork

Situated between three of Cambodia's oldest nature parks you can find a work of art created by world-famous architect Bill Bensley called Shinta Mani Wild.
Exploring Cambodia by Bicycle

Discover the wonders of Cambodia on a bicycle tour, exploring its history, culture, and breathtaking landscapes. Ideal for all levels of cyclists.
Must visit in Cambodia →