September weather forecast
Mau Wu Tsai, Hong Kong

September, the first month of the autumn in Mau Wu Tsai, is still a warm month, with an average temperature fluctuating between 26.5°C (79.7°F) and 29.6°C (85.3°F).

Temperature

Mau Wu Tsai, Hong Kong, starts September with an average high-temperature of a warm 29.6°C (85.3°F), hinting at a minimal fluctuation from August. Mau Wu Tsai sustains a near constant temperature throughout September, with nighttime averages of 26.5°C (79.7°F).

Heat index

The average heat index in September is calculated to be a very hot 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Note that heat index values are valued for light wind and location in the shade. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Mau Wu Tsai, in September, during 22.7 rainfall days, 155mm (6.1") of precipitation is typically accumulated. Throughout the year, there are 224.5 rainfall days, and 1264mm (49.76") of precipitation is accumulated.

Daylight

In Mau Wu Tsai, the average length of the day in September is 12h and 17min.
On the first day of September in Mau Wu Tsai, sunrise is at 06:05 and sunset at 18:40. On the last day of the month, sunrise is at 06:14 and sunset at 18:11 HKT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The months with the highest UV index in Mau Wu Tsai, Hong Kong, are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 7 in September transforms into this advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.