Cool
Average highs are around 11°C, so pack for cooler days.
January verdict
Onjuku, Japan in January
Weather score31Poor
Poor for holiday weather
Average highs are around 11°C, so pack for cooler days. Sunshine averages 5.3h per day, enough for a balanced month. Rainfall averages 78mm, which is relatively low for holiday planning.
January weather
Monthly averages
Temp
11°C
Rain
78mm
Sun
5.3h
Weather score
31
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 78mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.3h per day, enough for a balanced month.
Map
Weather map
Compare Onjuku, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January11°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
January78mm average rain
January is one of Onjuku's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to February, July, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
January5.3 hours average sun
January sits close to Onjuku's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
Weather score
January31 weather score
January scores below Onjuku'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.
