Bangkok’s rainy season usually runs from June to October, with September being the wettest month. During this time, the city receives an average of 250–400 mm of rain per month. The weather is still warm and humid, with average temperatures of 28–30°C.
The rainy season in Bangkok in 2024:
- May – As of May 21, 2024, the Meteorological Department announced that the rainy season had officially begun, with heavy rain reported in over 60% of the upper regions of the country.
- June – June continues the rainy season, with warm temperatures and occasional showers. Temperatures range from around 25.9°C to 32.1°C, with about 7 hours of sunlight per day.
- July – July is marked by the monsoon season, with warm temperatures and frequent rainfall. Temperatures range from around 25.5°C to 31.5°C, creating a tropical climate.
- August/September – The larger downpours and flooding occur in August and September. Bangkok receives an average 250-400mm of rain per month during these 2 months, with the highest amount coming in September (the rainiest month). The city averages 15-20 rainy days during this season.
- October – October marks the end of the rainy season, but the weather can be unpredictable. There could be torrential rains or clear blue skies.