September weather forecast and climate
Hanoi, Vietnam

The beautiful Tran Quoc Pagoda in Hanoi, Vietnam, with a view of more city structures in the far background
The beautiful Tran Quoc Pagoda in Hanoi, Vietnam, with a view of more city structures in the far background
Average temperature in September - Hanoi, Vietnam
  • Average high temperature in September: 30.9°C

The warmest month (with the highest average high temperature) is July (32.9°C).
The month with the lowest average high temperature is January (19.3°C).

  • Average low temperature in September: 24.7°C

The month with the highest average low temperature is July (26.1°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).

Average humidity in September - Hanoi, Vietnam
  • Average humidity in September: 79%

Months with the highest relative humidity are March and April (83%).
The month with the lowest relative humidity is November (74%).

Average rainfall in September - Hanoi, Vietnam
  • Average rainfall in September: 265.4mm

The wettest month (with the highest rainfall) is August (318mm).
The driest month (with the lowest rainfall) is January (18.6mm).

Average rainfall days in September - Hanoi, Vietnam
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is August (16.7 days).
The month with the lowest number of rainy days is December (6 days).

Average daylight in September / Average sunshine in September - Hanoi, Vietnam
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in September: 5.4h

The month with most sunshine is July (Average sunshine: 5.9h).
The month with least sunshine is March (Average sunshine: 1.4h).

Average UV index in September - Hanoi, Vietnam
  • Average UV index in September: 11

Months with the highest UV index are March, April, May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 7).

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