Phnom Penh in september: average Weather, Temperature and Climate
Weather in Phnom Penh in september 2025
The weather in Phnom Penh in the month of september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
bad weather UV index: 7
Weather at 6am
79°F
Partly Cloudy
39% of time
23%
16%
10%
Weather at 12pm
92°F
Moderate rain at times
41% of time
26%
16%
13%
Weather at 6pm
83°F
Heavy rain
50% of time
33%
9%
4%
Weather at 3am
79°F
32%
25%
17%
12%
Evolution of daily average temperature and precipitation in Phnom Penh in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Phnom Penh in september.
The climate of Phnom Penh in september is bad
the weather in Phnom Penh in september is wet (with 13.9in of precipitation over 21 days). The weather is worst than the previous month since in august there is an average of 9.6in of precipitation over 16 days.
The climate is very hot around this city this month. Temperatures are up to 92°F. In the morning the temperature drops to 79°F. Thus, the mean temperature average on this month of september in Phnom Penh is 86°F. These temperatures are far removed from those records observed in Phnom Penh in the month of september with a maximum record of 101°F in 2013 and a minimum record of 74°F in 2019. You can expect to have about 26 days with temperatures over 86°F, or 87 of time.
In september in Phnom Penh, the days on average last 12:11. Sunrise is at 05:50 and sets at 18:01.
September: another location in Cambodia?
If you want to go to Cambodia in september, there are destinations with better weather than Phnom Penh:
In september, Kampot, Kratie, Kampong Cham, Sambor Prei Kuk, Kirirom National Park and Koh Tonsay (Rabbit Island) have a tolerable climate, but better than Phnom Penh.
Seasonal average climate and temperature of Phnom Penh in september
Check below seasonal norms These statistics are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 86°F | ||||
| Highest temperature | 92°F | ||||
| Lowest temperature | 79°F | ||||
| Highest record temperature | 101°F (2013) | ||||
| Lowest record temperature | 74°F (2019) | ||||
| Number of days at +86°F | 26 day(s) (87%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 12km/h | ||||
| Wind temperature | 79°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 13.9in | ||||
| Number of days with rainfall | 21 day(s) (70%) | ||||
| Record daily rainfall | 3in (2012) | ||||
| Other climate data | |||||
| Humidity | 87% | ||||
| Visibility | 8.48km | ||||
| Cloud cover | 51% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:50 | ||||
| Time of sunset | 18:01 | ||||
| Length of day | 12:11 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Phnom Penh in september 2024:
77°F to 85°F
76°F to 86°F
77°F to 86°F
77°F to 85°F
77°F to 85°F
77°F to 88°F
77°F to 92°F
77°F to 92°F
76°F to 92°F
77°F to 88°F
76°F to 81°F
79°F to 83°F
76°F to 85°F
77°F to 83°F
77°F to 90°F
76°F to 90°F
77°F to 83°F
76°F to 77°F
76°F to 85°F
76°F to 90°F
77°F to 83°F
77°F to 81°F
76°F to 85°F
76°F to 88°F
76°F to 88°F
76°F to 88°F
77°F to 88°F
76°F to 90°F
77°F to 92°F
79°F to 92°F
Map: other cities in Cambodia in september
Cities near Phnom Penh:
| Koh Pen in september | tolerable weather |
| Kampong Cham in september | tolerable weather |
| Kirirom National Park in september | tolerable weather |
| Krong Kaeb in september | tolerable weather |
| Kampot in september | tolerable weather |
| Koh Tonsay (Rabbit Island) in september | tolerable weather |
| Sambor Prei Kuk in september | tolerable weather |
| Kratie in september | tolerable weather |
| Koh Thmei in september | very bad weather |
| Tonlé Sap in september | tolerable weather |
| Sihanoukville in september | very bad weather |
| Koh Ta Kiev in september | very bad weather |
Click over cities on the map for information about the weather in september.
Phnom Penh
perfect weather
good
tolerable
bad
very bad
Weather data for Phnom Penh in september:
Weather data for Phnom Penh for september are derived from an average of the weather forecast since 2009 in Phnom Penh. There is a margin of error and these forecasts are to be considered as general information only. The weather in Phnom Penh can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Phnom Penh.