The temperatures in Rayong during September are extremely high, between 27°C and hot as 30°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Rayong.
Rayong should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Rayong in September 2025.
If you’re planning to visit Rayong in the near future, we highly recommend that you review the 14 day weather forecast for Rayong before you arrive.