Taipei
Taiwan
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Taipei, Taiwan

Cloudy skies above the city of Taipei in Taiwan, with a bird
Cloudy skies above the city of Taipei in Taiwan, with a bird's eye view of the National Taiwan University buildings
September, the first month of the autumn, in Taipei, is still a tropical month, with temperature in the range of an average low of 24.8°C (76.6°F) and an average high of 31.1°C (88°F).

Temperature

In Taipei, the average high-temperature is essentially the same as in August - a still tropical 31.1°C (88°F). The average low-temperature, in September, is 24.8°C (76.6°F).

Heat index

The average heat index is calculated to a very hot 39.7°C (103.5°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, clothing, metabolic differences, and pregnancy affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in Taipei, Taiwan, is 75.8%.

Rainfall

September is the month with the most rainfall in Taipei. Rain falls for 13.8 days and accumulates 360.5mm (14.19") of precipitation.

Daylight

In Taipei, the average length of the day is 12.3h.

Sunshine

The average sunshine in Taipei, Taiwan, is 5.1h.

UV index

The average daily maximum UV index in Taipei is 10. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 10 interpret into the following advice:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.

What is the temperature in September in Taipei?

The average high-temperature, in September, is 31.1°C (88°F), while the average low-temperature is 24.8°C (76.6°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that represents influence of the relative humidity to air temperaure, in September is calculated to 39.7°C (103.5°F).

What is the average humidity in September in Taipei?

The average relative humidity in September in Taipei, Taiwan, is 75.8%.

How much does it rain in Taipei in September?

In Taipei, in September, it is raining for 13.8 days, with typically 360.5mm (14.19") of accumulated precipitation.

What is the wettest month in Taipei?

The month with the most rainfall in Taipei is September when the rain falls for 13.8 days and typically aggregates up to 360.5mm (14.19") of precipitation.

How many hours of daylight does Taipei have in September?

In September, the average length of the day in Taipei, Taiwan, is 12.3h.

How many hours of sunshine does Taipei have in September?

In Taipei, the average sunshine in September is 5.1h.

What is the UV index intensity in September in Taipei?

The average daily maximum UV index in September in Taipei is 10. A UV Index of 8 to 10 symbolizes a very high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Taipei, Taiwan
  • Average high temperature in September: 31.1°C

The warmest month (with the highest average high temperature) is July (34.3°C).
The month with the lowest average high temperature is January (19.1°C).

  • Average low temperature in September: 24.8°C

The month with the highest average low temperature is July (26.3°C).
The coldest month (with the lowest average low temperature) is January (13.9°C).

Average humidity in September - Taipei, Taiwan
  • Average humidity in September: 75.8%

The month with the highest relative humidity is February (80.6%).
The month with the lowest relative humidity is July (73%).

Average rainfall in September - Taipei, Taiwan
  • Average rainfall in September: 360.5mm

The wettest month (with the highest rainfall) is September (360.5mm).
The driest month (with the lowest rainfall) is December (73.3mm).

Average rainfall days in September - Taipei, Taiwan
  • Average rainfall days in September: 13.8 days

Months with the highest number of rainy days are March and June (15.5 days).
The month with the lowest number of rainy days is December (11.7 days).

Average daylight in September / Average sunshine in September - Taipei, Taiwan
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in September: 5.1h

The month with most sunshine is August (Average sunshine: 6.1h).
The month with least sunshine is February (Average sunshine: 2.5h).

Average UV index in September - Taipei, Taiwan
  • Average UV index in September: 10

Months with the highest UV index are May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 6).