In September, the weather in Bangkok is humid and rainy while temperature ranges from 25° to 33°C with 85% of humidity level and about 5 hours of daily sunshine. The month of September is among the wettest months of the year to visit Bangkok. If you are a lover of monsoon then you should surely try to get over to Bangkok. You need to check for some great attractions that you can visit during the month of September.
The weather of Bangkok is not suitable for outdoor explorations during the month of September. Bangkok receives a lot of rain during the month of September and so it is quite possible that you confront flooding and other natural conditions during the month of September but at the same time you may even get an opportunity to experience the stunning wet weather during this month.
Overview of Bangkok’s Weather in September 2025
| Season | September marks the monsoon season in Bangkok. |
| Temperature | The average temperature of Bangkok in the month of September is between 25° to 33°C. |
| Rainfall | The average rainfall experienced by Bangkok in the month of September is about 320 mm. |
| Sunshine | Bangkok receives about 5 hours of sunshine on a daily basis during September. |
| Humidity | The humidity level here is about 85% and the breeze speed is about 10 to 15 km/h. |
What’s the Weather like in Bangkok in September?
In the month of September, Bangkok experiences a different level of monsoon weather. The monsoons here in Bangkok are mixed with a lot of moisture and heat along with an immense spell of rainfall. You can plan your trip to Thailand for an amazing monsoon experience mixed with the thrill of the end monsoon season. But if you are planning to enjoy the beaches of Thailand then this is not an ideal month to visit Bangkok. The weather conditions prevailing in September are not at all suitable for outdoor explorations but are rather suitable for indoor activities.
What to expect in September?
Average temperature
The daytime conditions of Bangkok in the month of September are not suitable for outdoor activities as the heat is truly high. The temperatures get over as high as above 30°C during the day. Tourists normally do not prefer getting over to Thailand as the level of heat is beyond limits. However you can certainly enjoy an evening stroll in Bangkok. You are sure to experience some cool breezes and suitable temperature in the month of September. The weather gets wet especially during the night time. Due to humidity levels during the day, most of the tourists love to enjoy the streets and beaches of Bangkok in the month of September.
Rainfall
The month of September falls under full monsoon in the land of Bangkok. In the month of September, the rainfall in Bangkok is very harsh. The rainfall is heavy and affects the public life of Bangkok as heavy rains cause flood like situations. The rainfall spell is typically short but mostly intense. Such heavy rainfall makes outdoor plans difficult.
Sunshine
As September falls in the monsoon season the sunshine is not that considerable. Bangkok normally receives a spell of sunshine of about 5 hours on a daily basis. Sunshine is usually very warm during the month of September. If you wish to experience a soothing sunshine in Bangkok then you should not plan your visit in the month of September.
Pros and cons of visiting Bangkok in September
| Pros | Cons |
|---|---|
| September is actually the fruit season in Bangkok so you can get to enjoy the royal taste of Pineapple or Durians during this time. You can even enjoy the fruits at reasonable rates. | Bangkok faces unpredictable weather during the month of September so outdoor activities may get affected at this time. |
| September is not among the peak season in Bangkok so you are sure to experience less crowds and better deals on accommodations, sightseeing and restaurants in Bangkok. | It rains a lot in Bangkok during the month September so you can face public transport failure and other problems during the month of September. |
| The weather of Bangkok is cooler at times during the month of September so this makes up for a plus point to visit Bangkok in the month of September. | The level of humidity is very high in the month of September so travel and stroll becomes difficult. |
All Your Questions Answered
Skyscrapers, amusement parks, traditional water markets, shopping malls, and gardens all are best to visit during the month of September. If you wish to explore some amazing places in Bangkok then this is among the best times of the year. You are sure to find some great places to stroll around Bangkok. The weather at night is highly suitable for such exploration.
The weather in Thailand during the month of September is suitable for indoor exploration and some outdoor explorations too. The weather of Bangkok is cool and pleasant during the month of September. You can experience some occasional showers relieving tourists from heat and humidity.
Bangkok is worth visiting all year long but the months fall between October to March are the best months to visit the place. Bangkok provides you with its royal and real glory during these months.
You should carry with you sunblock, umbrella and hat for protection from sun and rain. You should carry breathable and light clothing for the weather in September.
Don’t forget to keep comfortable footwear for city exploration along with reusable water bottles for hydration. As Thailand is a tropical destination you should keep all these things with you for a smooth Thailand tour experience.
Yes, it normally rains more than normal during the month of September. September is among the rainiest months of the year in Bangkok. One can experience the royal monsoon weather in the month of September. It truly rains a lot in the month of September.
Southeast Thailand is the best place to visit during the month of September. You can surely explore the region of Ko Pha Ngan, Ko Samui and Ko Tao during the month of September. These places are suitable for the month of September.
September is normally counted among the wettest months of the year receiving a rainfall of about 220 mm. Bangkok experiences a temperature of about 29°C. October brings an end to the rainy season. So September is the rainiest month of the year.
