Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
Amami Oshima, Japan in September
Weather score54Mixed
Mixed for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 5.7h per day, enough for a balanced month. Rainfall averages 275mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
29°C
Rain
275mm
Sun
5.7h
Sea
28°C
Weather score
54
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 275mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Amami Oshima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°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
September275mm average rain
September sits near Amami Oshima's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April, July, and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.7 hours average sun
September sits close to Amami Oshima'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
September28°C average sea
September is one of Amami Oshima's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly 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 is one of Amami Oshima's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to October
These months have the strongest weather score in the monthly averages.
