Taichung weather in September
September in Taichung: sweltering, soaked, with muggy air — a gamble, with 23 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#9 of 12 months in Taichung · #1267 of 1413 destinations to visit in September · comfort 50/100 (tier D)
- Days
- 32°C
- Nights
- 25°C
- Wet days
- 23
- Sun
- 9.8 h
- Humidity
- 84%
- Daylight
- 12 h

Traveller notes on Taichung in September
Notes from nearby Sun Moon Lake (40 km away)
Taichung doesn't have its own notes for September yet — these are about Sun Moon Lake, close enough to share the season.
Sun Moon Lake-forum threads on September conditions confirm this still sits within Taiwan's typhoon season, posters directly discussing how an approaching storm might affect travel plans around the lake. Regulars are consistent a direct hit is disruptive but genuinely short-lived, most systems clearing within roughly half a day even though associated rain can linger longer, staying indoors standing advice regardless of the forecast beforehand. Posters describe a typical September day outside storm activity as clear through the morning, cloud building by afternoon, and a real chance of a short but heavy burst before clearing again. Regulars call checking a current storm tracker essential before finalizing any September itinerary. An umbrella or light rain jacket is standing advice throughout the broader wetter stretch running May through September. The record: 25.4C days feeling like a punishing 29C, 19C nights, an extraordinarily high 348mm across over 25 days and 88 percent humidity.
Other months in Taichung
Forum posters describe July and August in Taiwan as warm and humid, with temperatures commonly in the 33-36C range, and August sitting right in the middle of typhoon season (June through October), with August, July and September the three months most likely to see one make landfall. Posters are consistent that most summer rain actually comes as short, predictable afternoon thunderstorms lasting 30-60 minutes, with mornings typically sunny and clear - a pattern that lets visitors plan outdoor sightseeing for the morning and save indoor activities for the afternoon rain window. Posters note that if a typhoon does hit during a trip, it typically costs travelers one or two disrupted days with transport and parks shut down, though most storms just pass by without a direct hit. Posters generally rate August as hot, humid and genuinely typhoon-season for Taichung, workable with flexible plans and a morning-outdoor, afternoon-indoor rhythm.
Forum posters describe February in southern/central Taiwan as cool and pleasant, generally 15-20C, though cold snaps from the north can push temperatures down toward 10-12C with little warning even as some days climb into the high 20s. Winter counts as the dry season, which posters call a genuine advantage for outdoor sightseeing despite the cooler air. The standard packing list is layers - long pants, a light jacket, and a compact umbrella - with thicker layers reserved for any side trip up to higher-altitude spots like Alishan, and something warm for chilly evenings at the night markets.
Add your own note from Taichung's card on the map.
Taichung climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Taichung in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Taichung's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherTaichung's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Taichung in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Typhoon season
1 Jul – 30 Sep · usuallyClosuresThe basin shelters the city from the worst of the wind but not from the rain a stalled storm drops on the mountains behind it, which comes down through the river and closes roads. Source ↗
- Season
Wet season
MonsoonRisk23 rainy days and about 250 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Taichung — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Taichung?
Taichung in September — FAQ
- Is September a good time to visit Taichung?
- September in Taichung: sweltering, soaked, with muggy air — a gamble, with 23 rainy days. It ranks #9 of 12 months for Taichung on SeasonMap's comfort score (50/100).
- What is the weather like in Taichung in September?
- In September, Taichung averages a daily high of 31.7°C and a low of 25.2°C, with about 250.4 mm of rain over roughly 23.2 rainy days.
- What is the air quality in Taichung in September?
- Taichung has a mean US Air Quality Index of about 92 in September.
Within 300 km: Sun Moon Lake's Cross-lake Swimming Carnival around 10 Sep – 5 Oct, and Kenting's Raptor migration around 25 Sep – 25 Oct.