Weather in Phnom Penh in September
September in Phnom Penh is warm with average temperatures around 27.3°C (81.1°F). Expect significant rainfall with 190mm across approximately 22 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
30.4°C
86.7°F
Low
24.2°C
75.6°F
Precipitation
190 mm
7.5 inches
~22 rainy days
Conditions
Humidity
86%
Comparison to Adjacent Months
September is 23mm wetter than August.
September is 22mm wetter than October.