September weather forecast
Tây Tựu, Vietnam

The first month of the autumn, September, is still a tropical month in Tây Tựu, Vietnam, with an average temperature fluctuating between 31.7°C (89.1°F) and 24.2°C (75.6°F).

Temperature

The arrival of September denotes a barely perceptible change in the average high-temperatures to a still tropical 31.7°C (89.1°F) from August's 33.1°C (91.6°F). The nighttime temperature, during September, averages of 24.2°C (75.6°F).

Heat index

The average heat index in September is estimated at a blisteringly hot 43°C (109.4°F). Observe: Heat exhaustion and heat cramps are probable. Heatstroke is on the horizon with prolonged exertion.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

The months with the highest humidity are August and September, with an average relative humidity of 80%.

Rainfall

In Tây Tựu, during September, the rain falls for 18.5 days and regularly aggregates up to 73mm (2.87") of precipitation. In Tây Tựu, during the entire year, the rain falls for 181.2 days and collects up to 595mm (23.43") of precipitation.

Daylight

In September, the average length of the day is 12h and 16min.
On the first day of the month, sunrise is at 05:40 and sunset at 18:13. On the last day of September, sunrise is at 05:47 and sunset at 17:46 +07.

Sunshine

In September, the average sunshine is 8.5h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during September leads to these advisories:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.