September weather forecast
Hekou, China

The first month of the autumn, September, is also a hot month in Hekou, China, with an average temperature fluctuating between 18.7°C (65.7°F) and 30°C (86°F).

Temperature

Hekou's transition from August to September introduces an average high-temperature of a still hot 30°C (86°F), marking an insignificant variation from the 31°C (87.8°F). During the month of September, the temperature falls to an average of 18.7°C (65.7°F).

Heat index

The heat index value during September is evaluated at a fiery hot 37°C (98.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. 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 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Hekou, in September, during 20.4 rainfall days, 69mm (2.72") of precipitation is typically accumulated. In Hekou, during the entire year, the rain falls for 188.3 days and collects up to 770mm (30.31") of precipitation.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of the month, sunrise is at 05:46 and sunset at 18:21. On the last day of September, sunrise is at 05:55 and sunset at 17:52 +07.

Sunshine

The average sunshine in September is 10.2h.

UV index

March through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 6 suggests these recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. 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.