Bangkok weather in September: climate, tips and temperatures

Bangkok is a fascinating destination all year round, but those traveling in September should be prepared for the rainy season.

The month is still monsoon season, which means that tropical rain showers, high humidity and warm temperatures are the order of the day.

Nevertheless, there are also many sunny periods when the city is wonderful to explore.

Read this article to find out whether it’s worth traveling to Bangkok at this time of year and what you should be prepared for in terms of the weather – it’s all about the Bangkok weather in September.

Bangkok climate table: An overview of the year

Let’s start with our climate table for Bangkok, which gives you an overview of the best months to travel to the capital.

Here you can find more information about the best time to travel to Bangkok.

Bangkok weather in September – what to expect in the capital

September is in the middle of the rainy season, which means that you can expect frequent, but often short and heavy showers.

Temperatures remain tropically warm, so the combination of heat and high humidity can sometimes be exhausting.

Especially in the afternoon and evening hours, heavy rainfall can occur, often flooding roads for short periods.

Nevertheless, there are always dry and sunny stretches that are perfect for sightseeing and other activities.

It also stays warm at night, so a pleasant cool down is rare.

Despite the rainfall, Bangkok is a good place to visit in September – the city seems less crowded, accommodation is cheaper and many sights can be enjoyed without large crowds.

If you have a flexible daily schedule and are prepared for a few rain showers, you can explore Thailand’s capital in a relaxed manner this month.

Tip: Make sure that your accommodation has good air conditioning – especially on warm nights, this can make the difference between a good night’s sleep and sleepless hours.

Humidity and temperature

September is one of the wettest months in Bangkok, with humidity levels often exceeding 80%.

This means that temperatures often feel warmer than they actually are. Average temperatures range between 25 and 32 °C, although it can get very hot during the day and only cools down slightly in the evening.

The humidity rises significantly, especially after a rain shower, so it is important to drink enough water and take regular breaks.

Tip: Book a guided tour of the city’s most important sights to learn more about the history of Bangkok.

Rainy days and precipitation in September

In September, there is an average of 16 to 22 days of rain in Bangkok, with monthly rainfall of between 250 and 350 mm.

This means that it rains for more than half of the month, but rarely all day long.

The showers usually occur in the afternoon or evening and are short but intense. Minor flooding can occur temporarily, especially in low-lying parts of the city, but this usually recedes quickly.

Waterproof shoes or sandals are therefore a sensible choice. Public transportation such as the BTS Skytrain or MRT is always a good alternative during this time, as there are often traffic jams on the roads in heavy rain.

The big advantage of the rainy season is that the city is less crowded and the air quality is often better than in the drier months.

Tip: Always take a compact umbrella or a light rain jacket with you. Many locals use transparent plastic ponchos, which are available cheaply everywhere.

Sunshine and day length

Although there are many rainy days in September, the sun still shines regularly.

On average, there are around 5 to 6 hours of sunshine per day, so there is plenty of time to enjoy the city even in dry weather.

The length of the day is still around 12 to 13 hours, with sunrise at around 6:00 am and sunset at 6:20 pm.

The weather is often more pleasant, especially in the morning hours, which is why it is worth exploring the city early.

Is it worth traveling to Bangkok in September?

Whether a trip to Bangkok in September is worthwhile depends on your expectations. If you can live with occasional tropical rain showers, you will benefit from cheaper prices and fewer tourists.

Hotels are often cheaper in the low season, and sights such as the Grand Palace, Wat Arun or the Chatuchak market arenot as crowded as in the high season.

Nature in and around Bangkok is also a lush green. If you are flexible and prepared for the changeable weather, you can also spend an exciting time in the city in September.

Tip: This private tour of the city’s most important temples also takes you to Wat Arun, Wat Pho and the palace.

Bangkok weather in September – our tips for travelers

Here are some helpful tips to help you make the most of your stay despite the rainy season:

• Wear light, breathable clothing: Due to the high humidity, it is most comfortable to wear airy clothing made of cotton or linen.
• Take rain protection with you: A compact rain poncho or a light rain jacket are practical, as rain showers often occur suddenly. An umbrella can be useful, but quickly becomes impractical in strong winds.
• Pack good shoes: roads can be slippery or briefly flooded after heavy rainfall. Waterproof sandals or sneakers with good grip are recommended.
• Plan your sightseeing cleverly: Mornings are often better for exploring the city, as it often rains in the afternoon. Museums, temples or covered markets are a good alternative for rainy hours.
• Use indoor activities: Shopping malls such as the Siam Paragon, spa visits or culinary experiences at covered markets are perfect for making rainy days meaningful.
• Take advantage of lower prices: Hotels, tour operators and flights often offer attractive discounts in the low season, so you can treat yourself to more comfortable accommodation or exciting excursions at lower prices.
• Plan for public transportation: Taxis are often harder to come by during rain showers. Alternatives such as the BTS Skytrain or MRT Metro are reliable transportation options.
• Choose hotels with a pool or spa: After a hot day, a refreshing dip in the pool or a relaxing massage can be a welcome way to unwind.
• Shopping malls: Visit air-conditioned shopping malls such as the MBK Center or IconSiam to escape the heat.
• Boat tours: A trip on the Chao Phraya River offers a refreshing breeze and great views of the city.
• Night markets: After sunset, you can explore the lively night markets, e.g. the Asiatique Riverfront or the Train Night Market Ratchada.

Brief summary of the Bangkok weather in September

September brings with it a warm, tropical climate characterized by high humidity and regular rain showers.

Nevertheless, there are many sunny periods when Bangkok is a wonderful place to explore.

If you can cope with the occasional rain and want to take advantage of the low season – fewer tourists and cheaper prices – you will also have a great time in the Thai capital in September.

With the right preparation, nothing stands in the way of an exciting city trip!

Tip: This Bangkok street food tour takes you to Chinatown, where your local guide will tell you more about the history and food scene of the district.

Frequently asked questions about Bangkok weather in September

Finally, we answer some frequently asked questions about Bangkok weather in September.