What is the weather like in Phnom Penh vs Siem Reap in September?

In September, Phnom Penh averages 33°C high / 25°C low with about 256 mm of rain; Siem Reap averages 31°C high / 25°C low with about 254 mm.

Phnom Penh vs Siem Reap in September

Phnom Penh and Siem Reap are nearly tied in September — 47 vs 49 on SeasonMap's comfort score. Phnom Penh is sweltering, soaked, clean air; Siem Reap is sweltering, soaked, clean air.

Phnom Penh vs Siem Reap — September climate, side by side

	🇰🇭 Phnom Penh	🇰🇭 Siem Reap
Comfort score	47/100 (F)	49/100 (F)
Feels-like high	39°C	37°C
Avg high / low	33° / 25°	31° / 25°
Rainfall	256 mm	254 mm
Rainy days	27	27
Humidity	84%	86%
Air quality (AQI)	41	33

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

Month by month

Phnom Penh vs Siem Reap in September — FAQ

Is September better in Phnom Penh or Siem Reap?: Phnom Penh and Siem Reap are nearly tied in September — 47 vs 49 on SeasonMap's comfort score. Phnom Penh is sweltering, soaked, clean air; Siem Reap is sweltering, soaked, clean air.
What is the weather like in Phnom Penh vs Siem Reap in September?: In September, Phnom Penh averages 33°C high / 25°C low with about 256 mm of rain; Siem Reap averages 31°C high / 25°C low with about 254 mm.