Siem Reap Weather in September
Cambodia · 30-year monthly averages
⚠️ Challenging time to visit
September in Siem Reap is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 25°C (76°F). Expect roughly 301mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
Avg high
30°C
87°F
Avg low
25°C
76°F
Rainfall
301mm
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 Siem Reap in September?
- September in Siem Reap is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 25°C (76°F). Expect roughly 301mm of precipitation, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in Siem Reap in September?
- Siem Reap sees around 301mm of precipitation in September on average — very wet by global standards.
- Is September a good time to visit Siem Reap?
- September is a challenging month to visit Siem Reap weather-wise — plan around the conditions.