Taichung weather in September
September in Taichung: warm, soaked, with very humid — a gamble, with 22 rainy days.
#9 of 12 months in Taichung · #786 of 897 destinations to visit in September · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
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Taichung climate normals — September
| Daytime high | 29°C / 84°F | 🌤 warm |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Rainfall | 208 mm / 8.2 in | ⛈ soaked |
| Rainy days | 22 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 12.3 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 92 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Taichung in September — FAQ
- Is September a good time to visit Taichung?
- September in Taichung: warm, soaked, with very humid — a gamble, with 22 rainy days. It ranks #9 of 12 months for Taichung on SeasonMap's comfort score (61/100).
- What is the weather like in Taichung in September?
- In September, Taichung averages a daily high of 28.8°C and a low of 23°C, with about 207.8 mm of rain over roughly 21.6 rainy days.
- What is the air quality in Taichung in September?
- Taichung has a mean US Air Quality Index of about 92 in September.