Mild
Average highs are around 21°C, so days are mild rather than hot.
December verdict
Yonaguni, Japan in December
Weather score43Mixed
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 2.3h per day, so this is not one of the brighter months. Rainfall averages 152mm, so some wet days are possible.
December weather
Monthly averages
Temp
21°C
Rain
152mm
Sun
2.3h
Sea
25°C
Weather score
43
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 152mm, so some wet days are possible.
Limited sun
Sunshine averages 2.3h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 25°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
December21°C average high
December is on the cooler side of Yonaguni's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December152mm average rain
December is one of the drier months, but average rainfall is still high enough to keep backup plans useful.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December2.3 hours average sun
December 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
December25°C average sea
December is below Yonaguni's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJune to September
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
December43 weather score
December scores below Yonaguni's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsApril to October
These months have the strongest weather score in the monthly averages.
