Phnom Penh weather in September
Hot and humid, with frequent heavy rain. Average highs of 31°C and lows of 25°C, with around 27 rainy days expected throughout the month.
While September isn't our top-rated month for Phnom Penh, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
31°C
Average low
25°C
Rainy days
27 days
Best months to visit
January, February, December
What to do in Phnom Penh in September
Whatever the weather, Phnom Penh rewards curious visitors. Here are some of the best ways to spend your time:
Visit iconic Phnom Penh attractions and temples
Explore local markets and traditional neighborhoods
Experience regional cuisine and dining specialties
Trek or hike nearby mountains or natural features
Engage with local culture and minority communities
Photography opportunities at scenic viewpoints
What to pack for September
Light breathable clothing, high-SPF sunscreen, a wide-brimmed hat, and a reusable water bottle are essential. Pack sandals and at least one light layer for air-conditioned interiors.
Browse other months
Recommended
January
31C
Hot and humid, and mostly sunny skies.
Recommended
February
33C
Hot and humid, and mostly sunny skies.
March
34C
Hot and humid, with occasional showers.
April
34C
Hot and humid, with regular rainfall.
May
34C
Hot and humid, with frequent heavy rain.
June
33C
Hot and humid, with frequent heavy rain.
July
32C
Hot and humid, with frequent heavy rain.
August
32C
Hot and humid, with frequent heavy rain.
September (you are here)
31C
Hot and humid, with frequent heavy rain.
October
30C
Hot and humid, with frequent heavy rain.
November
31C
Hot and humid, with regular rainfall.
Recommended
December
30C
Hot and humid, with occasional showers.
Book your September trip to Phnom Penh
Find hotels, tours and experiences for the perfect escape.
