Transit Desk

Climate

Weather in Thailand in September

Weather in Thailand, September
In September, Thailand sees average highs of 30.8°C (87°F) and lows of 25.1°C (77°F), with around 337 mm of rain.

Thailand — September

Thailand September
Daytime high
30.8°C (87°F)
Overnight low
25.1°C (77°F)
Rainfall
337 mm
Best-time rank
Off-peak

How September compares

Thailand, September vs. the annual average (2025)
This month30.8°C (87°F) / 25.1°C (77°F) · 337 mm
Yearly average32.2°C (90°F) / 24.7°C (76°F) · 145 mm

September in Thailand runs 1.4°C (2.5°F) cooler than the yearly average, and is wetter than the yearly average. Pack layers you can adjust through the day — mild conditions, and something waterproof — this is a wetter month.

Common questions

What is the weather like in Thailand in September?

Average highs of 30.8°C (87°F) and lows of 25.1°C (77°F), with around 337 mm of rain.

Is September a good time to visit Thailand?

It is an off-peak month for comfort in Thailand; January, February, December tend to be more pleasant.

Updated climate normals, 2025