Mild
Average highs are around 22°C, so days are mild rather than hot.
September verdict
Mixed for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 4.7h per day, so this is not one of the brighter months. Rainfall averages 236mm, so showers are a real planning factor.
Monthly averages
Temp
22°C
Rain
236mm
Sun
4.7h
Sea
27°C
Weather score
45
Mixed
Mild
Average highs are around 22°C, so days are mild rather than hot.
Wet
Rainfall averages 236mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.7h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 27°C, which can work for swimming but may feel fresh.
Map
Compare Mount Ishizuchi, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
September22°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.
September236mm average rain
September sits near Mount Ishizuchi's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to March and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September4.7 hours average sun
September is below Mount Ishizuchi's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsMarch to May and July to August
This stretch has the strongest sunshine in the monthly averages.
September27°C average sea
September is one of Mount Ishizuchi's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
September45 weather score
September scores above Mount Ishizuchi's 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.
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