Siem Reap vs Bangkok

Siem Reap and Bangkok are closely matched in September. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Siem Reap can feel quite hot at 30°C, so plan for heat. Bangkok runs hot at 31°C.

For travelers who prioritize dry weather, both cities are equally dry in September.

Siem Reap reaches an average high of 30°C (86°F) and drops to 25°C (77°F) at night during September. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Bangkok averages 31°C (88°F) for the high and 25°C (77°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.

Siem Reap receives approximately 257 mm of rainfall across 26 rain days during September. Rain is frequent, so waterproof gear is essential.

Bangkok sees 241 mm over 26 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 82%.