Mild
Average highs are around 25°C, so days are mild rather than hot.
September verdict
Oki Islands, Japan in September
Weather score53Mixed
Mixed for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 5.1h per day, enough for a balanced month. Rainfall averages 210mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
25°C
Rain
210mm
Sun
5.1h
Sea
25°C
Weather score
53
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 210mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.1h per day, enough for a balanced month.
Swimmable
Sea temperatures average 25°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Oki Islands, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September25°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
September210mm average rain
September is one of Oki Islands' wettest months, so rain is likely to be a major planning factor.
Driest monthsFebruary to May, August, and October to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.1 hours average sun
September sits close to Oki Islands' yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September25°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 24°C in this stretch, so swimming comfort is at its strongest.
Weather score
September53 weather score
September scores above Oki Islands' yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
Hotels near Oki Islands, Japan
Marriott
Fairfield by Marriott Okayama Hiruzen HighlandManiwa, Okayama, Japan
Fairfield by Marriott Okayama TsuyamaTsuyama, Okayama, Japan
Fairfield by Marriott Hyogo Kannabe HighlandToyooka, Hyogo, Japan
Fairfield by Marriott Hyogo Tajima YabuYabu, Hyogo, Japan
Fairfield by Marriott Hiroshima SeraSera, Hiroshima, Japan
Yoruya, a Member of Design Hotels™Kurashiki shi, Japan