Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
September verdict
Yonaguni, Japan in September
Weather score54Mixed
Mixed for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 6h per day, enough for a balanced month. Rainfall averages 248mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
30°C
Rain
248mm
Sun
6h
Sea
29°C
Weather score
54
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 248mm, so showers are a real planning factor.
Some sun
Sunshine averages 6h 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
September30°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September248mm average rain
September 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
September6 hours average sun
September sits close to Yonaguni's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September29°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to September
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
September54 weather score
September 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.
