Click on a day for an hourly weather forecast
The temperatures in Thailand 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 Thailand. 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 Thailand in September 2025.
If you’re planning to visit Thailand in the near future, we highly recommend that you review the 14 day weather forecast for Thailand before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 33° / 24° | 2 | 29 | 0 | 30 mm | Good | Thailand in January |
| February | 34° / 26° | 1 | 27 | 0 | 24 mm | Ok | Thailand in February |
| March | 35° / 28° | 3 | 28 | 0 | 57 mm | Ok | Thailand in March |
| April | 36° / 29° | 6 | 24 | 0 | 100 mm | Ok | Thailand in April |
| May | 35° / 29° | 10 | 21 | 0 | 196 mm | Bad | Thailand in May |
| June | 34° / 28° | 10 | 20 | 0 | 202 mm | Bad | Thailand in June |
| July | 32° / 27° | 12 | 19 | 0 | 208 mm | Ok | Thailand in July |
| August | 32° / 27° | 12 | 19 | 0 | 226 mm | Ok | Thailand in August |
| September | 32° / 27° | 14 | 16 | 0 | 325 mm | Ok | Thailand in September |
| October | 32° / 26° | 15 | 16 | 0 | 435 mm | Ok | Thailand in October |
| November | 32° / 25° | 6 | 24 | 0 | 143 mm | Good | Thailand in November |
| December | 32° / 24° | 1 | 30 | 0 | 22 mm | Good | Thailand in December |