The temperatures in Bangkok during September are extremely high, between 27°C and hot as 32°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Bangkok. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Bangkok in September 2025.
If you’re planning to visit Bangkok in the near future, we highly recommend that you review the 14 day weather forecast for Bangkok before you arrive.
Temperatures
32° / 27°
Rainy Days
14
Snowy Days
0
Dry Days
16
Rainfall
325
mm
Sun Hours
10.3
Hrs
