Bangkok Weather in September

September in Bangkok averages 34°C (93°F) during the day and 26°C (79°F) at night. It is the wettest month of the year, with 333 mm (13 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Bangkok in September

Bangkok is in the rainy season in September, with rain on around 20 days and an average of 333 mm (13 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.

Temperature in Bangkok in September

Expect highs of 34°C (93°F) in Bangkok in September, with nights dropping to around 26°C (79°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights remain warm at around 26°C (79°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.

Sunshine in Bangkok in September

The area enjoys a balanced 155 hours of sunlight, ensuring it's neither too rainy nor too sunny.

Wind Speed in Bangkok in September

Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Bangkok. Our weather planner can help you explore destinations with more pleasant weather conditions.