Month guide · Phnom Penh · Cambodia
Phnom Penh in September
What September is really like in Phnom Penh: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Christophe95, CC BY-SA 4.0
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. Among the wettest months, with some street flooding after heavy storms; the quietest time for visitors.
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 Phnom Penh: 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 05:49
- Sunset (15 September)
- About 18:01
- Daylight
- About 12.2 hours
Wet season (June–August). Short, heavy afternoon storms, green surroundings and low hotel rates; mornings are usually fine for sightseeing.
Crowds and prices
On a 1–5 scale, September rates 1 for crowds (the peak is January at 4) and 1 for hotel prices (highest in January). That makes September one of the better-value months to book.
Events in September
- Pchum Ben — 15-day ancestors' festival; many people travel to home provinces (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.
Landmark · BKK1 (Boeung Keng Kang 1)
Independence Monument
Visit in the evening, when the park fills with locals and the monument is lit.
- Time needed
- 30 minutes
- Cost
- Free
- Free
- Architecture
- After dark
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Religious site · Riverside (Sisowath Quay)
Wat Ounalom
Founded in the 15th century, Wat Ounalom is the headquarters of Cambodia's largest Buddhist order and one of the city's most important monasteries.
- Time needed
- 30–45 minutes
- Cost
- Free
- Free
- History
- Off the beaten path
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Religious site · BKK1 (Boeung Keng Kang 1)
Wat Langka
Ask at the pagoda for the current meditation schedule; arrive a few minutes early and dress modestly.
- Time needed
- 1 hour
- Cost
- Free
- Free
- Off the beaten path
- History
Architecture · BKK1 (Boeung Keng Kang 1)
National Olympic Stadium
Vann Molyvann's 1960s stadium is a landmark of New Khmer Architecture, its sweeping concrete stands built on raised earth banks.
- Time needed
- 1 hour
- Cost
- Free
- Free
- Architecture
- Off the beaten path
- Active
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 Phnom Penh?
A quieter month with trade-offs, with a notable event on the calendar. If your dates are flexible, November–February are better overall. Compare every month.
Phnom Penh in other months
Questions travellers ask
+Is September a good time to visit Phnom Penh?
It is a quieter month with trade-offs. Among the wettest months, with some street flooding after heavy storms; the quietest time for visitors.
+How warm is Phnom Penh in September?
Average highs are around 32°C (90°F) and lows around 25°C (77°F).
+Does it rain a lot in Phnom Penh in September?
Expect rain on about 19 days of the month, so pack for wet weather.