September weather forecast
Ước Ngoại, Vietnam

September, the first month of the autumn in Ước Ngoại, is still a tropical month, with temperature in the range of an average low of 25.3°C (77.5°F) and an average high of 30.7°C (87.3°F).

Temperature

As Ước Ngoại welcomes September, the average high-temperature records at a still hot 30.7°C (87.3°F), marking an insignificant deviation from the prior month. Ước Ngoại records a consistent low-temperature of 25.3°C (77.5°F) during September nights.

Heat index

Throughout September, the heat index is appraised at a blisteringly hot 40°C (104°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. 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 physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Ước Ngoại, during September, the rain falls for 22.7 days and regularly aggregates up to 156mm (6.14") of precipitation. In Ước Ngoại, during the entire year, the rain falls for 219.4 days and collects up to 918mm (36.14") of precipitation.

Daylight

In Ước Ngoại, the average length of the day in September is 12h and 16min.
On the first day of September, sunrise is at 05:41 and sunset at 18:12. On the last day of the month, sunrise is at 05:47 and sunset at 17:46 +07.

Sunshine

In September, the average sunshine in Ước Ngoại is 9.3h.

UV index

In September, the average daily maximum UV index in Ước Ngoại is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a regular UV index of 6 translates into these guidelines:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.