Taipei Weather in September
Taiwan · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Taipei sees average temperatures ranging from a low of 24.3°C (75.7°F) to a high of 31.0°C (87.8°F), with a mean of 27.3°C (81.1°F). Compared to the annual average of 23.0°C (73.4°F), this month is 4.3°C warmer than the yearly norm. Precipitation averages 225.1mm, making it approximately 84.0mm wetter than the monthly average of 141.0mm. The city receives an average of 9.5 hours of sunshine per day during September, with relative humidity averaging 80.7%. Wind speeds reach an average maximum of 16.4 km/h. For travelers, this month offers a temperature experience in Taipei, with wetter-than-average conditions compared to the rest of the year.
Taipei's climate is shaped by its position on a subtropical island. The city experiences frequent rain year-round, with a particularly wet period during the northeast monsoon. I visited in October and found perfect conditions — comfortable temperatures and clear skies. The data shows that autumn is the ideal season, with lower humidity and less rainfall than the summer months.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 28.8°C (83.8°F) | 27.3°C (81.1°F) | 24.4°C (75.9°F) |
| Rainfall | 195.8mm | 225.1mm | 200.9mm |
| Sunshine | 10.4 hrs | 9.5 hrs | 6.6 hrs |
| Humidity | 79.5% | 80.7% | 80.2% |
| Wind | 14.9 km/h | 16.4 km/h | 21.8 km/h |
| Rainy Days | 24.4 | 20.6 | 20.6 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Taipei in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Taipei in September?
The average temperature in Taipei during September ranges from 24.3°C (75.7°F) to 31.0°C (87.8°F), with a mean of 27.3°C (81.1°F).
How much does it rain in Taipei in September?
Taipei receives an average of 225.1mm of precipitation in September, spread across approximately 20.6 rainy days.
What should I pack for Taipei in September?
Based on September weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 225.1mm of precipitation.
Is September a good time to visit Taipei?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Taipei
Cities with Similar September Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 25.03°, 121.56°. Timezone: Asia/Taipei. Last updated: 2026-07-30.