September weather forecast
Phượng Vũ, Vietnam

September, the first month of the autumn in Phượng Vũ, is still a tropical month, with an average temperature varying between 24.2°C (75.6°F) and 31.7°C (89.1°F).

Temperature

September welcomes an average high-temperature of a still hot 31.7°C (89.1°F), not much different from the preceding month. Phượng Vũ experiences a mean low-temperature of 24.2°C (75.6°F) during September.

Heat index

The heat index value for September is calculated to be a scorching 43°C (109.4°F). Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

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

Rainfall

In Phượng Vũ, in September, during 18.5 rainfall days, 73mm (2.87") of precipitation is typically accumulated. Throughout the year, there are 181.2 rainfall days, and 595mm (23.43") of precipitation is accumulated.

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 18:12. On the last day of September, sunrise is at 05:47 and sunset at 17:45 +07.

Sunshine

The average sunshine in September 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 vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.