September weather forecast
Ho Chi Minh City, Vietnam

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The modern infrastructure in the developed city of Ho Chi Minh City in Vietnam
The modern infrastructure in the developed city of Ho Chi Minh City in Vietnam

Weather in September

September brings a slightly cooler phase for Ho Chi Minh City with the high temperature dipping to 30.8°C (87.4°F). The city continues to experience high rainfall totals close to 175mm (6.89"), keeping up with the wet season narrative. Under these conditions, travel plans will likely need to account for occasional rainstorms. That said, relaxed indoor activities and sightseeing can also add a different perspective to the Vietnamese capital’s charm. Even with its wet weather, the vibrancy of Ho Chi Minh City in September remains undeniable.

Temperature

September, with its high-temperature average of 30.8°C (87.4°F) and a low-temperature average of 24.4°C (75.9°F), is the coldest month.

Heat index

For September, the heat index is estimated at a blisteringly hot 41°C (105.8°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

September is the most humid month, with an average relative humidity of 83%.

Rainfall

In September, the rain falls for 28.2 days. Throughout September, 175mm (6.89") of precipitation is accumulated. Throughout the year, there are 241.8 rainfall days, and 1283mm (50.51") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:43 and sunset at 18:03. On the last day of September, sunrise is at 05:42 and sunset at 17:44 +07.

Sunshine

In Ho Chi Minh City, the average sunshine in September is 7.3h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.

Frequently asked questions

What are the coldest months in Ho Chi Minh City?

September is the month when Ho Chi Minh City experiences its coldest temperatures, averaging a high of 30.8°C (87.4°F) and a low of 24.4°C (75.9°F).

Is it hot during September?

Ho Chi Minh City in September has an average high-temperature of 30.8°C (87.4°F) and an average low-temperature of 24.4°C (75.9°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is estimated at 41°C (105.8°F).

What is the most humid month?

September is the most humid month, with an average relative humidity of 83%.

What is the average humidity in September?

The average relative humidity in September is 83%.

How much does it rain in Ho Chi Minh City in September?

In Ho Chi Minh City, during September, the rain falls for 28.2 days and regularly aggregates up to 175mm (6.89") of precipitation.

What is the average length of the day in September?

In September, the average day length is 12h and 11min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 05:43 and sunset at 18:03. On the last day of the month, sunrise is at 05:42 and sunset at 17:44 +07.

How long on average sun shines in September?

In Ho Chi Minh City, Vietnam, the average sunshine duration in September is 7.3h.

What are the months with the highest UV index?

January through December, with an average maximum UV index of 7, are months with the highest UV index.

When is the lowest UV index?

The months with the lowest UV index are January through December, with an average maximum UV index of 7.

What is the UV index intensity in September?

In Ho Chi Minh City, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.

Average temperature in September
Ho Chi Minh City, Vietnam

Average temperature in September - Ho Chi Minh City, Vietnam
  • Average high temperature in September: 30.8°C

The warmest month (with the highest average high temperature) is March (35.4°C).
The month with the lowest average high temperature is September (30.8°C).

  • Average low temperature in September: 24.4°C

The month with the highest average low temperature is May (26.9°C).
The coldest month (with the lowest average low temperature) is January (22.9°C).

Average pressure in September
Ho Chi Minh City, Vietnam

Average pressure in September - Ho Chi Minh City, Vietnam
  • Average pressure in September: 1008.4mbar

The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).

Average wind speed in September
Ho Chi Minh City, Vietnam

Average wind speed in September - Ho Chi Minh City, Vietnam
  • Average wind speed in September: 8.9km/h

The windiest month (with the highest average wind speed) is March (11.5km/h).
The calmest month (with the lowest average wind speed) is October (6.7km/h).

Average humidity in September
Ho Chi Minh City, Vietnam

Average humidity in September - Ho Chi Minh City, Vietnam
  • Average humidity in September: 83%

The month with the highest relative humidity is September (83%).
The months with the lowest relative humidity are February and March (61%).

Average rainfall in September
Ho Chi Minh City, Vietnam

Average rainfall in September - Ho Chi Minh City, Vietnam
  • Average rainfall in September: 175mm

The wettest month (with the highest rainfall) is June (188mm).
The driest month (with the least rainfall) is February (10mm).

Average rainfall days in September
Ho Chi Minh City, Vietnam

Average rainfall days in September - Ho Chi Minh City, Vietnam
  • Average rainfall days in September: 28.2 days

The month with the highest number of rainy days is September (28.2 days).
The month with the least rainy days is February (5.1 days).

Average daylight in September /
Average sunshine in September
Ho Chi Minh City, Vietnam

Average daylight in September / Average sunshine in September - Ho Chi Minh City, Vietnam
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).

  • Average sunshine in September: 7h and 2min

The month with the most sunshine is April (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).

Average sunshine days in September
Ho Chi Minh City, Vietnam

Average sunshine days in September - Ho Chi Minh City, Vietnam
  • Average sunshine days in September: 1.2 days

The month with the most sunshine days is February (22.3 days).
The month with the least sunshine days is September (1.2 days).

Average UV index in September
Ho Chi Minh City, Vietnam

Average UV index in September - Ho Chi Minh City, Vietnam
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in September
Ho Chi Minh City, Vietnam

Average cloud cover in September - Ho Chi Minh City, Vietnam
  • Average cloud cover in September: 50

The months with the most cloud cover are July and September (Cloud cover 50).
The month with the least cloud cover is February (Cloud cover 20).

Average visibility in September
Ho Chi Minh City, Vietnam

Average visibility in September - Ho Chi Minh City, Vietnam
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).

Ho Chi Minh City, Vietnam

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