September weather forecast
Hekou, China

September, the first month of the autumn in Hekou, is still a tropical month, with an average temperature varying between 18.7°C (65.7°F) and 30°C (86°F).

Temperature

September's onset records an average high-temperature of a still hot 30°C (86°F), a near match to August's 31°C (87.8°F). In the month of September, Hekou experiences an average low-temperature of 18.7°C (65.7°F).

Heat index

September's average heat index is appraised at a sweltering 37°C (98.6°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in September is 77%.

Rainfall

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

Daylight

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

Sunshine

In September, the average sunshine in Hekou is 10.2h.

UV index

March through September, with an average maximum UV index of 6, are months with the highest UV index in Hekou. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In September, the UV index of 6 transforms into the following advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.