September weather forecast
Tsim Sha Tsui, Hong Kong

Weather in September in Tsim Sha Tsui signifies the gradual conclusion of the monsoon season. A decrease to 155mm (6.1") of rainfall is evident, marking the start of a relatively drier season. While temperatures begin to show a downward trend, the city stays relatively warm, rendered comfortable due to the decline in humidity. Sunshine hours remain high, as does the UV index. This situation offers a backdrop for outdoor activities despite the dwindling daylight hours.

Temperature

Stepping into September, Tsim Sha Tsui records an average high-temperature of a moderately hot 29.6°C (85.3°F), almost consistent with August. Tsim Sha Tsui sees a minor drop to an average minimum temperature of 26.5°C (79.7°F) during the night in the month of September.

Heat index

September's average heat index is appraised at a fiery hot 36°C (96.8°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In Tsim Sha Tsui, the average relative humidity in September is 77%.

Rainfall

In Tsim Sha Tsui, in September, it is raining for 22.7 days, with typically 155mm (6.1") of accumulated precipitation. Throughout the year, in Tsim Sha Tsui, there are 224.5 rainfall days, and 1264mm (49.76") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of the month, sunrise is at 06:06 and sunset at 18:40. On the last day of September, in Tsim Sha Tsui, Hong Kong, sunrise is at 06:14 and sunset at 18:12 HKT.

Sunshine

In Tsim Sha Tsui, the average sunshine in September is 8.4h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 7 during September translates into the following guidance:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.