Phnom Penh vs Ho Chi Minh City

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Phnom Penh edges ahead as the better destination in September. Phnom Penh offers 9 hours of daily sunshine with only 27 rain days, while Ho Chi Minh City sees 8 sunshine hours and 29 rain days.

Phnom Penh can feel quite hot at 31°C, so plan for heat. Ho Chi Minh City runs hot at 30°C.

For travelers who prioritize dry weather, Phnom Penh is the stronger choice in September. Phnom Penh receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Phnom Penh reaches an average high of 31°C (88°F) and drops to 24°C (75°F) at night during September. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Ho Chi Minh City averages 30°C (86°F) for the high and 24°C (75°F) for the low, with a daily range of 6°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.

Phnom Penh receives approximately 251 mm of rainfall across 27 rain days during September. Rain is frequent, so waterproof gear is essential.

Ho Chi Minh City sees 306 mm over 29 rain days. That makes Phnom Penh the drier option by 2 rain days and 55 mm of total precipitation.

Both cities share similar humidity levels at 82%.