Mild
Average highs are around 20°C, so days are mild rather than hot.
May verdict
Aso, Kumamoto, Japan in May
Weather score28Poor
Poor for holiday weather
Average highs are around 20°C, so days are mild rather than hot. Sunshine averages 5.4h per day, enough for a balanced month. Rainfall averages 267mm, so showers are a real planning factor.
May weather
Monthly averages
Temp
20°C
Rain
267mm
Sun
5.4h
Sea
19°C
Weather score
28
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 267mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 19°C, so the water can feel cool.
Map
Weather map
Compare Aso, Kumamoto, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May20°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.
Rain
May267mm average rain
May sits near Aso's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May5.4 hours average sun
May is one of Aso's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to May, July to August, and October
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May19°C average sea
May is close to Aso's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
May28 weather score
May scores below Aso's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
