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Vietnam weather in September 2025
Expect daytime maximum temperatures of 31°C in Vietnam in September and very high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 225 mm of rainfall in the month.
- 31°C max day temperature
31 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 225 mm of monthly rainfall
225 - 11 (Extreme) UV index
11
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The September weather guide for Vietnam (Hanoi) 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 Vietnam destinations
Below are average maximum temperatures at popular countries, regions and places in Vietnam in September. Select a holiday destination to see more weather parameters.
All Vietnam destinations
- Can Tho
- Cao Bang
- Con Dao Island
- Da Nang
- Dalat
- Ha Long Bay
- Haiphong
- Hanoi
- Ho Chi Minh City
- Hoi An
- Hue
- Mai Chau
- Mui Ne
- Nha Trang
- Phan Thiet
- Phu Quoc Island
- Qui Nhon
- Sapa
- Vung Tau
Metric (°C / mm) | Imperial (°F / inches)
More about Vietnam
How hot is it in Vietnam in September?
Daytime temperatures usually reach 31°C in Hanoi, Vietnam in September with very high heat and humidity, falling to 25°C at night.
How sunny is it in Vietnam in September?
There are normally 6 hours of bright sunshine each day in Hanoi, Vietnam in September - that's 48% of daylight hours.
Does it rain in Vietnam in September?
There are usually 14 days with some rain in Hanoi, Vietnam in September and the average monthly rainfall is 225mm.
What is the chance of a typhoon in Vietnam in September?
On average 1.9 days in September in Hanoi, Vietnam are likely to be affected by the passage of one or more tropical storms.
Vietnam September sunrise & sunset times
Browse the sunrise and sunset times for Vietnam in September 2025. Select a month to view Vietnam sunrise and sunset times for the next 12 months. The Vietnam sunrise and sunset times shown below are for Hanoi.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 05:40 | 18:13 |
| Monday, 15th September 2025 | 05:44 | 18:00 |
| Tuesday, 30th September 2025 | 05:47 | 17:46 |
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