Siem Reap (Angkor) in september: average Weather, Temperature and Climate
Weather in Siem Reap (Angkor) in september 2025
The weather in Siem Reap in september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
very bad weather UV index: 7
Weather at 6am
79°F
Moderate rain at times
39% of time
29%
19%
9%
Weather at 12pm
90°F
Moderate rain at times
45% of time
31%
17%
6%
Weather at 6pm
83°F
Heavy rain
49% of time
35%
9%
5%
Weather at 3am
79°F
49%
23%
15%
8%
Evolution of daily average temperature and precipitation in Siem Reap (Angkor) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Siem Reap (Angkor) in september.
The climate of Siem Reap (Angkor) in september is very bad
The climate in september in Siem Reap is wet (with 22.7in of rainfall over 25 days). Unfortunately, the weather conditions is worsening than the previous month since in august there is an average of 17.5in of rainfall over 23 days.
The climate is very warm in this location this month. Temperatures are up to 90°F. The seasonal minimum is 79°F. Thus, the mean temperature average in september in Siem Reap is 85°F. Note that these seasonal averages are in contrast with those observed in Siem Reap in september with a maximum record of 97°F in 2017 and a minimum record of 74°F in 2015. You can hope to have about 25 days with temperatures above 86°F, or 83 of time.
On average, in Siem Reap, the days of september last 12:12. The sun rises at 05:54 and sunset is at 18:06.
September: another location in Cambodia?
If you want to go to Cambodia in september, there are destinations with better weather than Siem Reap (Angkor):
In september, Kampot, Kratie, Kampong Cham, Sambor Prei Kuk, Kirirom National Park and Koh Tonsay (Rabbit Island) have a tolerable climate, but better than Siem Reap (Angkor).
Seasonal average climate and temperature of Siem Reap (Angkor) in september
Check below seasonal norms These statistics are generated from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 90°F | ||||
| Lowest temperature | 79°F | ||||
| Highest record temperature | 97°F (2017) | ||||
| Lowest record temperature | 74°F (2015) | ||||
| Number of days at +86°F | 25 day(s) (83%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 10km/h | ||||
| Wind temperature | 79°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 22.7in | ||||
| Number of days with rainfall | 25 day(s) (84%) | ||||
| Record daily rainfall | 4.5in (2020) | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 8.34km | ||||
| Cloud cover | 50% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:54 | ||||
| Time of sunset | 18:06 | ||||
| Length of day | 12:12 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Siem Reap (Angkor) in september 2024:
77°F to 92°F
77°F to 90°F
77°F to 86°F
77°F to 86°F
77°F to 88°F
77°F to 88°F
77°F to 88°F
77°F to 88°F
77°F to 90°F
77°F to 92°F
77°F to 90°F
77°F to 90°F
77°F to 88°F
77°F to 85°F
77°F to 90°F
77°F to 92°F
77°F to 88°F
76°F to 79°F
76°F to 85°F
77°F to 86°F
77°F to 85°F
77°F to 83°F
77°F to 86°F
76°F to 88°F
76°F to 81°F
74°F to 88°F
77°F to 88°F
77°F to 90°F
77°F to 94°F
77°F to 92°F
Map: other cities in Cambodia in september
Cities near Siem Reap (Angkor):
| Kbal Spean in september | very bad weather |
| Beng Mealea in september | very bad weather |
| Tonlé Sap in september | tolerable weather |
| Battambang in september | bad weather |
| Kulen Prum Tep in september | very bad weather |
| Preah Vihear in september | very bad weather |
| Sambor Prei Kuk in september | tolerable weather |
| Poipet in september | bad weather |
| Phnum Samkoh Reserve in september | tolerable weather |
| Kirirom National Park in september | tolerable weather |
| Stoeng Treng in september | bad weather |
| Phnom Penh in september | bad weather |
Click over cities on the map for information about the weather in september.
Siem Reap (Angkor)
perfect weather
good
tolerable
bad
very bad
Weather data for Siem Reap (Angkor) in september:
Weather data for Siem Reap (Angkor) for september are derived from an average of the weather forecast since 2009 in Siem Reap (Angkor). There is a margin of error and these forecasts are to be considered as general information only. The weather in Siem Reap (Angkor) 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 Siem Reap (Angkor).