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Ha Long Bay weather in September 2026
Expect daytime maximum temperatures of 31°C in Ha Long Bay, 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 206 mm of rainfall in the month.
- 31°C max day temperature
31 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 24°C min night temperature
24 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 206 mm of monthly rainfall
206 - 11 (Extreme) UV index
11 - 29°C sea temperature
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The September weather guide for Vietnam (Ha Long Bay) 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.
Metric (°C / mm) | Imperial (°F / inches)
More about Vietnam
How hot is it in Ha Long Bay in September?
Daytime temperatures usually reach 31°C in Ha Long Bay in September with very high heat and humidity, falling to 25°C at night.
How sunny is it in Ha Long Bay in September?
There are normally 6 hours of bright sunshine each day in Ha Long Bay in September - that's 48% of daylight hours.
Does it rain in Ha Long Bay in September?
There are usually 14 days with some rain in Ha Long Bay in September and the average monthly rainfall is 225mm.
What is the chance of a typhoon in Ha Long Bay in September?
On average 1.9 days in September in Ha Long Bay are likely to be affected by the passage of one or more tropical storms.
Ha Long Bay September sunrise & sunset times
Browse the sunrise and sunset times for Ha Long Bay in September 2026. Select a month to view Ha Long Bay sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 05:35 | 18:08 |
| Tuesday, 15th September 2026 | 05:39 | 17:55 |
| Wednesday, 30th September 2026 | 05:43 | 17:41 |
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