Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
Weather Guide
Yonaguni, Japan Average Monthly Weather
Weather score50Mixed annual avg
Best months: July, October, June
Across the year, average daytime temperatures are around 26°C, sunshine averages 4.4h per day, and rainfall totals about 2327mm. Sea temperatures average 27°C across the year.
Annual weather
Annual averages
Temp
26°C
Rain
2327mm
Annual total
Sun
4.4h
Sea
27°C
Weather score
50
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 243mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.9h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Yonaguni, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August31°C average high
August is one of Yonaguni's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August243mm average rain
August is one of Yonaguni's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.9 hours average sun
August is brighter than Yonaguni's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August29°C average sea
August is one of Yonaguni's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to September
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
August54 weather score
August scores above Yonaguni's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsApril to October
These months have the strongest weather score in the monthly averages.
