September weather forecast
An Lư, Vietnam

The first month of the autumn, September, is still a tropical month in An Lư, Vietnam, with an average temperature varying between 25.2°C (77.4°F) and 30.8°C (87.4°F).

Temperature

The shift into September finds An Lư at an average high-temperature of a still hot 30.8°C (87.4°F), closely comparable to August's conditions. Throughout September, the temperature tends to fall to a consistent average low of 25.2°C (77.4°F).

Heat index

September's heat index is estimated at an extremely hot 40°C (104°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in September is 78%.

Rainfall

In An Lư, in September, during 19.9 rainfall days, 121mm (4.76") of precipitation is typically accumulated. In An Lư, Vietnam, during the entire year, the rain falls for 205.9 days and collects up to 966mm (38.03") of precipitation.

Daylight

The average length of the day in September is 12h and 16min.
On the first day of September, sunrise is at 05:37 and sunset at 18:09. On the last day of the month, sunrise is at 05:44 and sunset at 17:42 +07.

Sunshine

In September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.