Month guide · Siem Reap · Cambodia
Siem Reap in September
What September is really like in Siem Reap: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Piseth1, CC BY-SA 3.0
Quick answer
September is a quieter month with trade-offs. Expect average highs of 32°C (90°F), lows of 25°C (77°F), about 19 rainy days and roughly 12.2 hours of daylight. Usually the wettest month; heavy rain can flood low-lying streets in town, but the temples are at their quietest.
Key facts
- Average high / low
- 32°C (90°F) / 25°C (77°F)
- Rainy days
- About 19
- Daylight
- About 12.2 hours
- Crowds
- Very quiet
- Hotel prices
- Lowest
Weather in September
September is the 9th-warmest month in Siem Reap: days average 32°C (90°F) against a yearly average high of 33°C (91°F), and nights fall to about 25°C (77°F). Rain falls on roughly 19 of its 30 days. Compared with August (32°C (90°F)), September is about as warm; by October highs stay near 31°C (88°F).
- Sunrise (15 September)
- About 05:53
- Sunset (15 September)
- About 18:06
- Daylight
- About 12.2 hours
Early wet season (May–July). Short, heavy afternoon storms, green rice fields and quiet temples, with good-value hotels and mornings that are usually dry.
Crowds and prices
On a 1–5 scale, September rates 1 for crowds (the peak is January at 5) and 1 for hotel prices (highest in January). That makes September one of the better-value months to book.
Events in September
- Autumn equinox sunrise over Angkor Wat's central tower (around 21–22 September)
- Pchum Ben — 15-day festival honouring ancestors, with busy pagodas (September or October)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in September
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Experience · Old Market and Pub Street
Artisans Angkor
Take the free workshop tour before shopping; prices are fixed and higher than the market, but quality is consistent.
- Time needed
- 1 hour
- Cost
- Free
- Free
- Art
- Rainy day
- Shopping
Museum · Road to Banteay Srei
Cambodia Landmine Museum
Founded by Aki Ra, a former child soldier who went on to clear thousands of mines, this small museum displays defused mines and ordnance and explains the impact of decades of conflict on rural Cambodia.
- Time needed
- 1 hour
- Cost
- Low cost
- History
- Rainy day
Religious site · Angkor Archaeological Park
Angkor Wat
For sunrise, stand by the northern reflecting pool (left of the causeway), then go straight inside while most of the crowd heads to breakfast.
- Time needed
- 3–4 hours
- Cost
- Mid-priced
- Iconic
- History
- Architecture
- Photo spot
- Couples
Religious site · Angkor Thom
Bayon and Angkor Thom
Angkor Thom was the walled capital of King Jayavarman VII in the late 12th century, entered through gates such as the South Gate, where rows of gods and demons line the causeway holding a giant serpent.
- Time needed
- 2–3 hours
- Cost
- Mid-priced
- Iconic
- History
- Kids
- Photo spot
- Architecture
What to pack
For highs near 32°C, lows near 25°C and 19 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; a compact umbrella and waterproof shoes — rain is frequent; comfortable walking shoes.
Is September a good time to visit Siem Reap?
A quieter month with trade-offs, with 2 notable events on the calendar. If your dates are flexible, November–February are better overall. Compare every month.
Siem Reap in other months
Questions travellers ask
+Is September a good time to visit Siem Reap?
It is a quieter month with trade-offs. Usually the wettest month; heavy rain can flood low-lying streets in town, but the temples are at their quietest.
+How warm is Siem Reap in September?
Average highs are around 32°C (90°F) and lows around 25°C (77°F).
+Does it rain a lot in Siem Reap in September?
Expect rain on about 19 days of the month, so pack for wet weather.