September weather forecast
Hsinchu City, Taiwan

September marks the onset of the gradual cooling off in Hsinchu City, with temperatures starting to decline from the summer highs. The days still remain significantly warm and humid, mirrored by a corresponding decline in the rainfall. It is during September that one can witness the transition from summer to autumn, amplified by the changing landscapes and soothing sea breezes from the nearby coastline.

Temperature

As Hsinchu City transitions into September, the average high-temperature stands at a still hot 31°C (87.8°F), offering little variation from the preceding month. In September, Hsinchu City reports a consistent average low-temperature of 24.1°C (75.4°F) during the nights.

Heat index

The average heat index in September is evaluated at a fiery hot 39°C (102.2°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. 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.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

September is the least humid month, with an average relative humidity of 75.1%.

Rainfall

In Hsinchu City, during September, the rain falls for 6.8 days and regularly aggregates up to 95mm (3.74") of precipitation. Throughout the year, there are 116.6 rainfall days, and 1639mm (64.53") of precipitation is accumulated.

Sea temperature

In Hsinchu City, the average seawater temperature in September is 27.5°C (81.5°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

In September, the average length of the day in Hsinchu City is 12h and 18min.
On the first day of the month, sunrise is at 05:37 and sunset at 18:14. On the last day of September, sunrise is at 05:47 and sunset at 17:44 CST.

Sunshine

The average sunshine in September is 6.9h.