Hanoi weather in September 2025

Expect daytime maximum temperatures of 88°F in Hanoi, 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 8.9 inches of rainfall in the month.

  • 88°F maximum daytime temperature in September in Hanoi88
    88°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in September in Hanoi14
    14 days with some rainfall
  • 77°F minimum night-time temperature in September in Hanoi77
    77°F min night temperature
  • 12 hours of daylight per day in September in Hanoi12
    12 hours of daylight per day
  • Very high heat & humidity in September in HanoiVH
    Very High heat & humidity
  • 8.9 inches monthly rainfall in September in Hanoi8.9
    8.9 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Hanoi11
    11 (Extreme) UV index

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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.

Metric (°C)  |  Imperial (°F)

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More about Vietnam

How hot is it in Hanoi in September?

Daytime temperatures usually reach 88°F in Hanoi in September with very high heat and humidity, falling to 77°F at night.

How sunny is it in Hanoi in September?

There are normally 6 hours of bright sunshine each day in Hanoi in September - that's 48% of daylight hours.

Does it rain in Hanoi in September?

There are usually 14 days with some rain in Hanoi in September and the average monthly rainfall is 8.9 inches.

What is the chance of a typhoon in Hanoi in September?

On average 1.9 days in September in Hanoi are likely to be affected by the passage of one or more tropical storms.

Hanoi September sunrise & sunset times

Browse the sunrise and sunset times for Hanoi in September 2025. Select a month to view Hanoi sunrise and sunset times for the next 12 months.

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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