Bangkok vs Siem Reap

Bangkok and Siem Reap 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.

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

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

Bangkok reaches an average high of 31°C (88°F) and drops to 25°C (77°F) at night during September. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.

Siem Reap averages 30°C (86°F) for the high and 25°C (77°F) for the low, with a daily range of 5°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.

Bangkok receives approximately 241 mm of rainfall across 26 rain days during September. Rain is frequent, so waterproof gear is essential.

Siem Reap sees 257 mm over 26 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 82%.