If you plan to visit Bangkok in September, the weather is typically alright, with an average high temperature of +90°F during the day and approximately 0 sunny days. Expect some rainy, though, as there are typically 15 rainy days in the month and around 232 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+90°F
Avg. max. temperature
+73°F
Min.
+99°F
Max.
232 mm
Total precipitation
79%
Avg. humidity
1 m/s
Avg. wind
0 ☀️
Sunny Days
1 ⛅️
Cloudy
15 🌦
Rainy
Our opinion: Bangkok has OK weather in September.
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Average temperature in Bangkok in September
Here are the expected maximum, average and minimum temperatures in Bangkok for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +95°F during the day to a minimum of +77°F during the night, the temperature in September averages around +91°F.
The average maximum temperature goes down 10% by the end of the month, compared with the beginning of the month, from +93°F to +91°F.
Is Bangkok warm or cold in September?
Bangkok is typically hot in September.
Maximum temperatures go down compared to the previous month from +91°F to +90°F. The minimum temperature also goes up from +79°F to +79°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
September is one of the coolest months in Bangkok, here is the comparison with other months:
Climate in Bangkok in September
Bangkok weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+91°F
+90°F
+90°F
Min. temperature
+73°F
+73°F
+66°F
Max. temperature
+100°F
+99°F
+99°F
Rainfall
141 mm
232 mm
186 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
75%
79%
79%
Air pressure
1006 HPa
1007 HPa
1009 HPa
Sunny days
0
0
1
Cloudy days
1
1
5
Rainy days
21
15
13
Snowy days
0
0
0
September weather is still as ok as in August.It’s getting colder in September. From +91°F in the day, the average maximum temperature lowers to +90°F.Prepare for more rain. Average rainfall goes from 141 mm to 232 mm.Humidity rises from 75% to 79%.The average wind speed doesn’t change much during September, staying around 1 m/s.The amount of sunny days stay about the same, averaging 0 sunny days during the month.
October brings much the same weather, it remains ok.
Wind speed in Bangkok in September based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Bangkok is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Bangkok based on historical data.
Last Year
Historical Data
Typically, there is a 100% chance of rain on an average day in September, with total rainfall of approximately 288 mm. The maximum amount of rainfall per day is around 36 mm, which is moderate rain.September is a pretty wet month with over 30 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
September is one of the rainiest months in Bangkok, here is a comparison with other months, total mm:
Bangkok wettest month is September, where a typical day has a 50% chance of precipitation and 232 mm of rainfall per day. December, on the other hand, is the driest month with a mere 13% chance of precipitation and 8 mm of rainfall per day.
How was the weather last September in Bangkok?
This is the weather in Bangkok in September 2023:
1 September
☁️
+93°F
2 September
☁️
+95°F
3 September
☁️
+95°F
4 September
☁️
+96°F
5 September
☁️
+92°F
6 September
🌧️
+92°F
7 September
🌧️
+93°F
8 September
🌧️
+92°F
9 September
🌧️
+95°F
10 September
🌧️
+91°F
11 September
🌧️
+87°F
12 September
🌧️
+91°F
13 September
🌧️
+89°F
14 September
☁️
+93°F
15 September
🌧️
+89°F
16 September
🌧️
+91°F
17 September
🌧️
+91°F
18 September
🌧️
+88°F
19 September
☁️
+90°F
20 September
☁️
+94°F
21 September
☁️
+94°F
22 September
☁️
+92°F
23 September
☁️
+92°F
24 September
☁️
+91°F
25 September
🌧️
+93°F
26 September
🌧️
+91°F
27 September
☁️
+89°F
28 September
🌧️
+88°F
29 September
🌧️
+89°F
30 September
☁️
+91°F
In September 2023 Bangkok had 0 sunny days, 14 cloudy days, and 16 rainy days. The average maximum temperature was +91°F, with an absolute maximum of +95°F and a minimum of +88°F. The average humidity was 80%, with a maximum of 100% and a minimum of 54%. The average wind speed was 2 m/s, with a maximum of 5 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change Over the Years
This is how Bangkok climate has changed over the last 43 years.
The climate in Bangkok in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1985 (+90°F) and the highest in 2020 (+93°F). The driest year was 1979 with only 810 mm of rainfall, and the wettest year was 2018 with 1630 mm.
FAQ
Frequently asked questions about the weather in Bangkok in September:
Is September a good time to visit Bangkok?
It’s always a good time to visit Bangkok, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Bangkok in September?
Absolutely, September is hot in Bangkok. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.
Is Bangkok rainy in September?
Bangkok is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Bangkok in September?
Usually, it’s not very sunny in Bangkok in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Thailand
Check out the weather for other cities in Thailand.
For this page, we’ve looked at the typical weather in Bangkok, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
