What is the weather like in Koh Rong vs Phnom Penh in September?

In September, Koh Rong averages 29°C high / 26°C low with about 545 mm of rain; Phnom Penh averages 33°C high / 25°C low with about 256 mm.

Koh Rong vs Phnom Penh in September

Koh Rong is the better pick in September — 51 vs 47 on SeasonMap's comfort score. Koh Rong is sweltering, soaked, clean air, while Phnom Penh is sweltering, soaked, clean air.

Koh Rong vs Phnom Penh — September climate, side by side

	🇰🇭 Koh Rong	🇰🇭 Phnom Penh
Comfort score	51/100 (D)	47/100 (F)
Feels-like high	35°C	39°C
Avg high / low	29° / 26°	33° / 25°
Rainfall	545 mm	256 mm
Rainy days	29	27
Humidity	88%	84%
Air quality (AQI)	37	41

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

Month by month

Koh Rong vs Phnom Penh in September — FAQ

Is September better in Koh Rong or Phnom Penh?: Koh Rong is the better pick in September — 51 vs 47 on SeasonMap's comfort score. Koh Rong is sweltering, soaked, clean air, while Phnom Penh is sweltering, soaked, clean air.
What is the weather like in Koh Rong vs Phnom Penh in September?: In September, Koh Rong averages 29°C high / 26°C low with about 545 mm of rain; Phnom Penh averages 33°C high / 25°C low with about 256 mm.