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Phnom Penh weather in September 2025
Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Phnom Penh in September. Check more long-term weather averages for Phnom Penh in September before you book your next holiday to Cambodia in 2025/2026.
- 3131°C max day temperature
- 5 hours of sunshine per day
- 1919 days with some rainfall
- 2424°C min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 245245 mm of monthly rainfall
- 1111+ (Extreme) UV index
More about Phnom Penh
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Phnom Penh by month
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Recommended for Cambodia
The September weather guide for Cambodia (Phnom Penh) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Cambodia
How hot is it in Phnom Penh in September?
Daytime temperatures usually reach 31°C in Phnom Penh in September with very high heat and humidity, falling to 24°C at night.
How sunny is it in Phnom Penh in September?
There are normally 5 hours of bright sunshine each day in Phnom Penh in September - that's 41% of daylight hours.
Does it rain in Phnom Penh in September?
There are usually 19 days with some rain in Phnom Penh in September and the average monthly rainfall is 245mm.
Phnom Penh September sunrise & sunset times
Browse the sunrise and sunset times for Phnom Penh in September 2025. Select a month to view Phnom Penh sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:50 | 18:10 |
Monday, 15th September 2025 | 05:50 | 18:01 |
Tuesday, 30th September 2025 | 05:49 | 17:51 |
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