Average temperatures, rainfall and packing tips for Hanoi, Vietnam in September
September in Hanoi is typically hot, with average daytime highs around 31°C and nights near 25°C. Temperature-wise it sits mid-range for Hanoi (the 6th warmest month).
September is typically the wettest month of the year in Hanoi, with around 641 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Hanoi are usually January, February, March, October, November and December.
← Hanoi weather tomorrow (live)
In September, Hanoi averages a daytime high of about 31°C and a night-time low of around 25°C, based on recent historical data.
September is typically the wettest month of the year in Hanoi, with around 641 mm of rain - plan around showers.
September is a workable time to visit Hanoi, with hot days - just pack accordingly. If your dates are flexible, the most comfortable months in Hanoi are usually January, February, March, October, November and December.