What is the weather like in Phnom Penh vs Sihanoukville in September?

In September, Phnom Penh averages 33°C high / 25°C low with about 256 mm of rain; Sihanoukville averages 28°C high / 25°C low with about 530 mm.

Phnom Penh vs Sihanoukville in September

Sihanoukville is the better pick in September — 53 vs 47 on SeasonMap's comfort score. Sihanoukville is sweltering, soaked, clean air, while Phnom Penh is sweltering, soaked, clean air.

Phnom Penh vs Sihanoukville — September climate, side by side

	🇰🇭 Phnom Penh	🇰🇭 Sihanoukville
Comfort score	47/100 (F)	53/100 (D)
Feels-like high	39°C	34°C
Avg high / low	33° / 25°	28° / 25°
Rainfall	256 mm	530 mm
Rainy days	27	29
Humidity	84%	86%
Air quality (AQI)	41	30

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Phnom Penh vs Sihanoukville in September — FAQ

Is September better in Phnom Penh or Sihanoukville?: Sihanoukville is the better pick in September — 53 vs 47 on SeasonMap's comfort score. Sihanoukville is sweltering, soaked, clean air, while Phnom Penh is sweltering, soaked, clean air.
What is the weather like in Phnom Penh vs Sihanoukville in September?: In September, Phnom Penh averages 33°C high / 25°C low with about 256 mm of rain; Sihanoukville averages 28°C high / 25°C low with about 530 mm.