September weather forecast
Vietnam

September is a month of transition for Vietnam's climate. Northern regions see the arrival of autumn, Central Vietnam faces the tail-end of the typhoon season, and Southern Vietnam starts winding down its rainy season.

In Northern Vietnam, including cities such as Hanoi and Sapa, September brings the start of autumn. Temperatures begin to drop, ranging between 25°C (77°F) and 33°C (91.4°F), providing a pleasant respite from the summer heat. Rainfall also decreases, though occasional showers and thunderstorms can still be expected.

Central Vietnam, including the historic cities of Hue and Hoi An, experiences continued rainfall, albeit with less frequency and intensity as the month progresses. Temperatures remain fairly consistent with previous months, averaging between 24°C (75.2°F) and 33°C (91.4°F). The threat of typhoons begins to diminish, but caution is still advised during early September.

In the South, encompassing Ho Chi Minh City and the Mekong Delta, the rainfall starts to decline as the region transitions out of the peak wet season. However, temperatures remain high, averaging between 25°C (77°F) and 33°C (91.4°F), and heavy downpours can still occur, particularly in early September.

Transitioning from August to September, the weather patterns in Vietnam undergo significant changes. The North welcomes the cooler autumn climate, Central Vietnam sees a reduction in the intensity of the typhoon season, and Southern Vietnam begins its gradual departure from the monsoon season.

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• Hanoi - September »
  The months with the highest humidity in Hanoi are August and September, with an average relative humidity of 80%. In Hanoi, during September, the rain falls for 18.5 days and regularly aggregates up to 73mm (2.87") of precipitation.
• Ho Chi Minh City - September »
  With an average relative humidity of 83%, September is the most humid month in Ho Chi Minh City, Vietnam. Ho Chi Minh City reaches its average lowest temperatures in September, measuring 30.8°C (87.4°F) at the peak and 24.4°C (75.9°F) at the lowest.
• Da Nang - September »
  On the last day of September, in Da Nang sunrise is at 05:36 and sunset at 17:37 +07. In Da Nang during September, the rain falls for 24 days and regularly aggregates up to 183mm (7.2") of precipitation.
• Hai Phong - September »
  In the month of September, the nighttime temperature in Hai Phong dips to a steady average of 24.2°C (75.6°F). On the last day of September, in Hai Phong sunrise is at 05:44 and sunset at 17:42 +07.
• Can Tho - September »
  The average heat index, which calculates the temperature value influenced by the moisture in the air, in September is appraised at 42°C (107.6°F). In Can Tho in September, the average water temperature is 28.6°C (83.5°F).
• Huế - September »
  The nighttime temperature in Huế dips to a warm 24.5°C (76.1°F) on average during September. In September, in Huế the rain falls for 20.3 days.
• Vinh - September »
  The month with the most rainfall in Vinh is September, when the rain falls for 18.8 days and typically aggregates up to 169mm (6.65") of precipitation. In Vinh in September, during 18.8 rainfall days, 169mm (6.65") of precipitation is typically accumulated.
• Phan Thiet - September »
  September marks a peak in Phan Thiet, Vietnam's rainfall with a total precipitation volume of 223mm (8.78") over twenty days. In Phan Thiet, in September, during 20 rainfall days, 223mm (8.78") of precipitation is typically accumulated.
• Vũng Tàu - September »
  In Vũng Tàu, in September, during 20 rainfall days, 253mm (9.96") of precipitation is typically accumulated. On the first day of September in Vũng Tàu, sunrise is at 05:41 and sunset at 18:00.
• Thai Nguyen - September »
  The first month of the autumn, September, is still a tropical month in Thai Nguyen, Vietnam, with an average temperature varying between 30.9°C (87.6°F) and 23°C (73.4°F). In Thai Nguyen, Vietnam, in September, it is raining for 22.6 days, with typically 150mm (5.91") of accumulated precipitation.