Taipei weather in September
In September, Taipei has an average high of 29 °C85 °F and an average low of 25 °C77 °F, with about 243 mm9.6 in of precipitation. It is the 4th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 1.7 °C3 °F cooler on average and drier by 20 mm0.8 in. Compared with October, September is 3.1 °C5.5 °F warmer on average and wetter by 134 mm5.3 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 85% and the average cloud amount 67%.
Is September a good time to visit Taipei?
September is not among the most comfortable months by our comfort score: it is hot (average high 29 °C85 °F), it is fairly wet (243 mm9.6 in) and it is humid (85%). The most comfortable months in Taipei are February and March and November and December.
What to wear in September
For Taipei in September, pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Taipei | 2985 | 2577 | 2439.6 |
| Keelung | 2883 | 2679 | 2529.9 |
| Taoyuan | 2984 | 2476 | 2439.6 |
| Hsinchu | 2985 | 2577 | 2439.6 |
| Toufen | 3085 | 2679 | 1736.8 |
| Taichung | 3187 | 2476 | 1877.4 |
| Yuanlin | 3188 | 2577 | 1877.4 |
| Chiayi City | 3289 | 2576 | 2289.0 |
| Fuzhou | 2985 | 2374 | 1405.5 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Chiayi City.
Other months in Taipei
- January18 °C65 °F / 13 °C56 °F
- February20 °C67 °F / 14 °C57 °F
- March22 °C71 °F / 15 °C60 °F
- April25 °C78 °F / 19 °C66 °F
- May28 °C83 °F / 23 °C73 °F
- June30 °C86 °F / 25 °C77 °F
- July32 °C89 °F / 27 °C80 °F
- August31 °C88 °F / 26 °C80 °F
- September29 °C85 °F / 25 °C77 °F
- October26 °C79 °F / 22 °C71 °F
- November24 °C75 °F / 19 °C67 °F
- December20 °C67 °F / 15 °C60 °F
Frequently asked questions
How warm is Taipei in September?
In September the average high in Taipei is 29 °C (85 °F) and the average low is 25 °C (77 °F).
Does it rain a lot in Taipei in September?
On average about 243 mm (9.6 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Taipei?
No. The warmest month in Taipei is July, with an average high of 32 °C (89 °F). The coldest month is January, with an average low of 13 °C (56 °F).
How long is the day in Taipei in September?
In the middle of September the day in Taipei lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Taipei in September?
The average relative humidity in September is about 85%. Combined with warm days, it can feel muggy.
How cloudy is Taipei in September?
On average about 67% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 229 m, while Taipei lies at about 5 m. Temperatures on this page were therefore adjusted by +1.5 °C2.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.