Hong Kong edges it in September. Hong Kong averages 26–30°C with moderate crowds; Bangkok 25–33°C with very low crowds.
By Daan · Last reviewed October 2026
Hong Kong and Bangkok
The verdict for September
Hot, but slowly improving
+Strong cultural calendar
–Weather remains unpredictable
September is still hot and humid, with substantial rainfall and continued tropical-cyclone exposure. Conditions generally become more comfortable as the month progresses.
Wettest, cheapest, quietest
+One of the quietest and best-value periods of the year.
–The wettest part of the year, with frequent heavy rain and potential flooding.
Maximum value if you can tolerate the rain.
Scores and crowd levels are my own judgement; temperatures are monthly averages. Higher scores are better: quieter, cheaper and more pleasant.
Another month