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

The arrival of September in Hsinchu City, Taiwan, denotes a barely perceptible change in the average high-temperatures to a still hot 31°C (87.8°F) from August's 32.6°C (90.7°F). Throughout the month of September, Hsinchu City observes an average nighttime temperature of 24.1°C (75.4°F).

Heat index

September's average heat index is estimated at a very hot 39°C (102.2°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

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

Rainfall

In Hsinchu City, Taiwan, in September, during 6.8 rainfall days, 95mm (3.74") of precipitation is typically accumulated. Throughout the year, in Hsinchu City, there are 116.6 rainfall days, and 1639mm (64.53") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature in Hsinchu City is 27.5°C (81.5°F).
Note: In water temperatures ranging between 25°C (77°F) and 29°C (84.2°F), activities such as swimming and diving become highly pleasurable for long durations.

Daylight

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

Sunshine

In September, the average sunshine in Hsinchu City is 6.9h.