Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
May verdict
Mixed for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 4.5h per day, so this is not one of the brighter months. Rainfall averages 216mm, so showers are a real planning factor.

Monthly averages
Temp
28°C
Rain
216mm
Sun
4.5h
Weather score
51
Mixed
Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Wet
Rainfall averages 216mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
Map
Compare Yilan, Taiwan with nearby places by weather score, rain, sun, temperature, and swim conditions.
May28°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
May216mm average rain
May is wetter than Yilan's yearly average, so flexible plans matter more.
Driest monthsJanuary and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May4.5 hours average sun
May is below Yilan'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.
May51 weather score
May sits close to Yilan's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly and September to October
These months have the strongest weather score in the monthly averages.