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Thailand weather in September 2025
Expect daytime maximum temperatures of 32°C in Thailand in September and very high heat and humidity based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 292 mm of rainfall in the month.
- 32°C max day temperature
32 - 5 hours of sunshine per day
- 20 days with some rainfall
20 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 292 mm of monthly rainfall
292 - 11+ (Extreme) UV index
11
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The September weather guide for Thailand (Bangkok) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Thailand destinations
Below are average maximum temperatures at popular countries, regions and places in Thailand in September. Select a holiday destination to see more weather parameters.
All Thailand destinations
- Bangkok
- Cha Am
- Chiang Mai
- Chiang Rai
- Hat Yai
- Hua Hin
- Kanchanaburi
- Khao Lak
- Khao Sok National Park
- Khao Yai National Park
- Koh Chang
- Koh Samui
- Krabi
- Mae Hong Son
- Nakhon Ratchasima
- Nan
- Nong Khai
- Pattaya
- Phi Phi
- Phuket
- Sukhothai
- Surat Thani
- Ubon Ratchathani
- Udon Thani
Metric (°C / mm) | Imperial (°F / inches)
More about Thailand
How hot is it in Thailand in September?
Daytime temperatures usually reach 32°C in Bangkok, Thailand in September with very high heat and humidity, falling to 25°C at night.
How sunny is it in Thailand in September?
There are normally 5 hours of bright sunshine each day in Bangkok, Thailand in September - that's 43% of daylight hours.
Does it rain in Thailand in September?
There are usually 20 days with some rain in Bangkok, Thailand in September and the average monthly rainfall is 292mm.
What is the chance of a typhoon in Thailand in September?
On average less than 1 day in September in Bangkok, Thailand is likely to be affected by the passage of one or more tropical storms.
Thailand September sunrise & sunset times
Browse the sunrise and sunset times for Thailand in September 2025. Select a month to view Thailand sunrise and sunset times for the next 12 months. The Thailand sunrise and sunset times shown below are for Bangkok.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:06 | 18:29 |
| Monday, 15th September 2025 | 06:07 | 18:19 |
| Tuesday, 30th September 2025 | 06:07 | 18:08 |
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