Tainan weather in April
April in Tainan: hot, rainy, with muggy air — fine if you can take sticky heat.
Updated September 2026 · climate normals from ERA5 reanalysis
#6 of 12 months in Tainan · #1048 of 1413 destinations to visit in April · comfort 71/100 (tier B)
- Days
- 28°C
- Nights
- 23°C
- Wet days
- 10
- Sun
- 10.8 h
- Humidity
- 79%
- Daylight
- 13 h

Traveller notes on Tainan in April
Notes from nearby Alishan (83 km away)
Tainan doesn't have its own notes for April yet — these are about Alishan, close enough to share the season.
Alishan-forum threads on sunrise temperatures describe conditions at the summit viewpoint as genuinely cold regardless of how mild Chiayi feels below, posters calling readings in the single digits Celsius entirely plausible for the early wait. Regulars call the sunrise train departure around five-thirty standard, staying overnight strongly preferred over a lengthy pre-dawn drive up. Regulars describe daytime temperatures as considerably milder once the sun is up, a real layer system working better than one heavy coat given the swing. Posters call late February through June broadly the favored stretch, typhoon season from July into early October a real reason to avoid later months. Regulars recommend booking sunrise train tickets well ahead, capacity limited and demand high. Posters call the cypress forest walks worth the visit independent of the sunrise. The record: 17.2C days feeling like 18C, 9.9C nights, an extraordinarily high 182.5mm across nearly 24 days and 82 percent humidity.
Other months in Tainan
Forum posters describe July and August as Taiwan's hottest months, typically 33-36C with high humidity, and afternoon thundershowers a regular feature of the June-August stretch. Posters are consistent that August sits within typhoon season (June-October), with August, July and September the three months most likely to see a storm make landfall - roughly three to four typhoons affect Taiwan in an average season, and a direct hit during a trip can cost travelers one to two disrupted days. Posters are equally clear that summer travel remains genuinely popular despite the heat, pointing to Taiwan's excellent air-conditioned MRT, malls and convenience stores, plus shaved ice and bubble tea on seemingly every corner, as real relief options. Posters generally rate August as hot, humid and typhoon-season for Tainan, entirely workable with flexible plans and frequent air-conditioned breaks.
Forum posters describe February in southern Taiwan as cool and pleasant, typically 15-20C, milder than the 10-15C posters report further north - winter here is generally mild outside the high mountains. It's not officially the rainy season, but posters note rain remains a real possibility on any given day, so a light jacket that also handles rain is standard packing advice. Cold fronts can occasionally push temperatures down to around 6C for a couple of days, a real but temporary dip rather than the norm. Posters describe February overall as the tail end of winter with spring clearly approaching, milder than most visitors expect coming from more northerly climates.
Add your own note from Tainan's card on the map.
Tainan climate normals — April
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Tainan in April
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 Tainan'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 weatherTainan's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Tainan in April
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
The dry half of the year
15 Oct – 15 Apr · usuallyDry seasonSouthern Taiwan barely rains for six months, and this is when the old capital is at its best for walking between temples. The catch is the air, which stagnates in the same months.
Nearby, and something's on
Within 300 km of Tainan — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Tainan?
Tainan in April — FAQ
- Is April a good time to visit Tainan?
- April in Tainan: hot, rainy, with muggy air — fine if you can take sticky heat. It ranks #6 of 12 months for Tainan on SeasonMap's comfort score (71/100).
- What is the weather like in Tainan in April?
- In April, Tainan averages a daily high of 28.3°C and a low of 22.9°C, with about 99.3 mm of rain over roughly 10.1 rainy days.
- What is the air quality in Tainan in April?
- Tainan has a mean US Air Quality Index of about 91 in April.
Within 300 km: Alishan's Alishan Cherry Blossom Festival around 10 Mar – 10 Apr, and Sun Moon Lake's Firefly season around 1 Apr – 15 May.