Weather in Taichung

Rain is the monsoon runs from April to September, inside an annual total of 1738 mm. The wettest month is August at 329 mm; the driest is December at 42 mm.

Taichung is in Taiwan at 24.1°N. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. July is the warmest month (average 27.4°C, high 30.5°C) and January is the coolest (average 17.7°C, low 13.2°C). On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are March, November, and December.

Temperature through the year

Monthly average highs run from 22.1°C in January to 30.5°C in July. Nights follow the same curve: 13.2°C in January and 24.4°C in July.

Across the year the mean afternoon high is 27.3°C. If you want the smallest day–night shock, look at months where the high and low sit close together; July nights still hold 24.4°C.

Rainfall pattern

The monsoon in Taichung starts in April and ends in September (April, May, June, July, August, and September). August is the core of it at 329 mm. December is the other extreme, with 42 mm.

Humidity peaks near 85%. That usually lines up with the wetter months rather than the hottest ones.

The calendar in Taichung

The year bottoms out in January. Plan for 13.2°C at night and 22.1°C in the afternoon. May brings 256 mm and 17 rainy days; temperatures run from 22.3°C to 29.2°C. In June, Taichung averages 29.4°C by day and 23.7°C at night, with 312 mm of rain. Peak heat arrives in July: 30.5°C by day, 24.4°C at night, and 83% humidity. August is the wettest month — 329 mm and 21 rainy days, with 85% humidity.

By September the monsoon is ending. Taichung still sees about 187 mm, but the next month is usually leaner. October: 29.1°C high, 21.2°C low, 60 mm rain, 75% humidity. In November, Taichung averages 27.3°C by day and 18.9°C at night, with 46 mm of rain. December is the driest month, averaging only 42 mm across 6 rainy days. Highs sit near 23.7°C.

When the score favours a visit

The three months with the highest comfort score are March, November, and December: March (20.7°C average, 83 mm, 73% humidity); November (23.1°C average, 46 mm, 74% humidity); December (19.3°C average, 42 mm, 73% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at April–September instead of the score.

Taichung and other cities in Taiwan

Taipei is about 132 km away: Taichung is 0.5°C cooler than Taipei in its hottest month and 178 mm drier over the year than Taipei. Taipei’s wettest month is June (270 mm) versus August here.

Tainan is about 137 km away: Taichung is 1.6°C cooler than Tainan in its hottest month and 154 mm drier over the year than Tainan. Tainan’s wettest month is August (442 mm) versus August here.

Kaohsiung is about 174 km away: Taichung is 1.7°C cooler than Kaohsiung in its hottest month and 99 mm wetter over the year than Kaohsiung. Kaohsiung’s wettest month is August (403 mm) versus August here.