September weather forecast
Hải Lăng, Vietnam

September ushers in a subtle transition from summer to autumn. It experiences a slight drop in temperature compared to the preceding month, signalling the impending arrival of cooler weather. Despite a decrease in the duration of daylight, this does not significantly affect the sunshine hours, which only slightly decrease. The city receives a good amount of rainfall, although lesser than the record rainfall in August. Overall, the weather remains balmy and comparatively drier with the wind speed falling to 9.5km/h (5.9mph).

Temperature

Hải Lăng records an average high-temperature of a still hot 31.3°C (88.3°F) in September, closely mirroring the climate of the previous month. Hải Lăng sees an average low-temperature of 25°C (77°F) during September.

Heat index

September's average heat index is calculated to be a blistering 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in September is 80%.

Rainfall

In Hải Lăng, in September, it is raining for 15.9 days, with typically 44mm (1.73") of accumulated precipitation. In Hải Lăng, Vietnam, during the entire year, the rain falls for 140.7 days and collects up to 282mm (11.1") of precipitation.

Daylight

In Hải Lăng, the average length of the day in September 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 17:40 +07.

Sunshine

In Hải Lăng, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.