Phnom Penh Weather in September
Cambodia · 30-year monthly averages
⚠️ Challenging time to visit
September in Phnom Penh is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 24°C (76°F). Expect roughly 256mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
Avg high
31°C
88°F
Avg low
24°C
76°F
Rainfall
256mm
very wet
Mean temp
28°C
82°F
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Phnom Penh in September?
- September in Phnom Penh is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 24°C (76°F). Expect roughly 256mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in Phnom Penh in September?
- Phnom Penh sees around 256mm of precipitation in September on average — very wet by global standards.
- Is September a good time to visit Phnom Penh?
- September is a challenging month to visit Phnom Penh weather-wise — plan around the conditions.