September weather forecast
Hải Lăng, Vietnam

The first month of the autumn, September, is still a hot month in Hải Lăng, Vietnam, with an average temperature ranging between max 31.3°C (88.3°F) and min 25°C (77°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still tropical 31.3°C (88.3°F). In September, the average low-temperature is 25°C (77°F).

Heat index

The average heat index in September is computed to be a blistering 42°C (107.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, wind, differences in body mass, height, and shape, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Hải Lăng, Vietnam, in September, it is raining for 15.9 days, with typically 44mm (1.73") of accumulated precipitation. Throughout the year, in Hải Lăng, there are 140.7 rainfall days, and 282mm (11.1") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September, sunrise is at 05:37 and sunset at 18:04. On the last day of the month, sunrise is at 05:40 and sunset at 17:41 +07.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The months with the highest UV index in Hải Lăng are April through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.