Mild
Average highs are around 21°C, so days are mild rather than hot.
December verdict
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 3.9h per day, so this is not one of the brighter months. Rainfall averages 47mm, which is relatively low for holiday planning.

Monthly averages
Temp
21°C
Rain
47mm
Sun
3.9h
Sea
21°C
Weather score
49
Mixed
Mild
Average highs are around 21°C, so days are mild rather than hot.
Drier
Rainfall averages 47mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 3.9h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Compare Taichung, Taiwan with nearby places by weather score, rain, sun, temperature, and swim conditions.
December21°C average high
December is on the cooler side of Taichung's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
December47mm average rain
December is one of Taichung's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to April and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
December3.9 hours average sun
December is below Taichung's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
December21°C average sea
December is below Taichung's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJune to September
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
December49 weather score
December sits close to Taichung's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsSeptember to November
These months have the strongest weather score in the monthly averages.