Bangkok Weather in September – Average Temperature and Rainfall
- High
- 31.0°
- Low
- 25.0°
- Rainfall
- 297 mm
- Rainy season
- 27d
- max
- 33.9°
- min
- 22.9°
September
- Early
- 31.2° 89.3 mm
- Mid
- 31.1° 98.8 mm
- Late
- 30.7° 108.6 mm
Summary
The climate figures for Bangkok are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,561 mm.
The rainy season runs May–October. The wettest month is September with 296.7 mm across 27 rain days; the driest is December at just 19.2 mm.
The hottest month is April (average high 34.3°C) and the coolest is October (30.9°C).
The most comfortable time to visit Bangkok is December — less rain and milder heat.
Monthly averages
Common questions
Will it rain in Bangkok today?
Yes. Rain is expected around 13:00–18:00, totalling roughly 1.4 mm.
How hot is it in Bangkok today?
Between 26°C and 33°C, with a felt maximum of 39°C.
What is the weather in Bangkok tomorrow?
Tomorrow: heavy drizzle, 26–33°C, with a 100% chance of rain.