Month guide · Bangkok · Thailand
Bangkok in September
What September is really like in Bangkok: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Chainwit., CC BY-SA 4.0
Quick answer
September is a quieter month with trade-offs. Expect average highs of 32°C (90°F), lows of 25°C (77°F), about 21 rainy days and roughly 12.2 hours of daylight. Usually the wettest month, with long storms and occasional street flooding; some of the lowest hotel prices of the year.
Key facts
- Average high / low
- 32°C (90°F) / 25°C (77°F)
- Rainy days
- About 21
- Daylight
- About 12.2 hours
- Crowds
- Quiet
- Hotel prices
- Low
Weather in September
September is the 9th-warmest month in Bangkok: days average 32°C (90°F) against a yearly average high of 33°C (91°F), and nights fall to about 25°C (77°F). Rain falls on roughly 21 of its 30 days. Compared with August (32°C (90°F)), September is about as warm; by October highs stay near 32°C (90°F).
- Sunrise (15 September)
- About 06:07
- Sunset (15 September)
- About 18:19
- Daylight
- About 12.2 hours
Early rainy season (June–August). Hot, sunny mornings broken by short, heavy afternoon storms; quieter temples and lower hotel prices.
Crowds and prices
On a 1–5 scale, September rates 2 for crowds (the peak is January at 5) and 2 for hotel prices (highest in January). That makes September one of the better-value months to book.
Events in September
- Vegetarian Festival in Chinatown, marked by yellow flags (usually September or October)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in September
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Museum · Pathum Wan
Jim Thompson House
Combine it with the Bangkok Art and Culture Centre near BTS National Stadium, a few minutes' walk away.
- Time needed
- 1–1.5 hours
- Cost
- Low cost
- History
- Architecture
- Art
- Rainy day
Museum · Rattanakosin
Bangkok National Museum
In the former Front Palace beside Sanam Luang, the national museum covers Thai art and history from prehistoric times, with gilded royal funeral chariots, Buddha images in every regional style and the Buddhaisawan Chapel with its painted murals.
- Time needed
- 2 hours
- Cost
- Low cost
- History
- Art
- Rainy day
Museum · Rattanakosin
Museum Siam
Arrive or leave by MRT Sanam Chai, whose station hall is decorated like a royal palace.
- Time needed
- 1.5 hours
- Cost
- Low cost
- Kids
- Rainy day
- History
Waterfront · Thonburi riverside
ICONSIAM
This vast riverside mall on the Thonburi bank, opened in 2018, includes SookSiam, an indoor floor of food and craft stalls laid out like a floating market representing Thailand's regions.
- Time needed
- 2–3 hours
- Cost
- Free
- Shopping
- Food
- Rainy day
- Free
- Kids
What to pack
For highs near 32°C, lows near 25°C and 21 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; a compact umbrella and waterproof shoes — rain is frequent; comfortable walking shoes.
Is September a good time to visit Bangkok?
A quieter month with trade-offs, with a notable event on the calendar. If your dates are flexible, November–February are better overall. Compare every month.
Bangkok in other months
Questions travellers ask
+Is September a good time to visit Bangkok?
It is a quieter month with trade-offs. Usually the wettest month, with long storms and occasional street flooding; some of the lowest hotel prices of the year.
+How warm is Bangkok in September?
Average highs are around 32°C (90°F) and lows around 25°C (77°F).
+Does it rain a lot in Bangkok in September?
Expect rain on about 21 days of the month, so pack for wet weather.