Mild
Average highs are around 21°C, so days are mild rather than hot.
May verdict
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 5.8h per day, enough for a balanced month. Rainfall averages 164mm, so some wet days are possible.
Monthly averages
Temp
21°C
Rain
164mm
Sun
5.8h
Weather score
44
Mixed
Mild
Average highs are around 21°C, so days are mild rather than hot.
Showers
Rainfall averages 164mm, so some wet days are possible.
Some sun
Sunshine averages 5.8h per day, enough for a balanced month.
Map
Compare Onjuku, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
May21°C average high
May is close to Onjuku's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
May164mm average rain
May sits near Onjuku's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, July, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May5.8 hours average sun
May is brighter than Onjuku's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
May44 weather score
May sits close to Onjuku's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.