Cool
Average highs are around 20°C, so pack for cooler days.
January verdict
Yonaguni, Japan in January
Weather score36Poor
Poor for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 2.1h per day, so this is not one of the brighter months. Rainfall averages 169mm, so some wet days are possible.
January weather
Monthly averages
Temp
20°C
Rain
169mm
Sun
2.1h
Sea
24°C
Weather score
36
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 169mm, so some wet days are possible.
Limited sun
Sunshine averages 2.1h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Yonaguni, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January20°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
January169mm average rain
January sits on the drier side of Yonaguni's year, which helps with sightseeing and transfers.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
January2.1 hours average sun
January is one of Yonaguni's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
January24°C average sea
January is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJune to September
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
January36 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsApril to October
These months have the strongest weather score in the monthly averages.
