September weather forecast
Ho Chi Minh City, Vietnam

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.