Cool
Average highs are around 11°C, so pack for cooler days.
December verdict
Poor for holiday weather
Average highs are around 11°C, so pack for cooler days. Sunshine averages 4h per day, so this is not one of the brighter months. Rainfall averages 41mm, which is relatively low for holiday planning.
Monthly averages
Temp
11°C
Rain
41mm
Sun
4h
Sea
17°C
Weather score
25
Poor
Cool
Average highs are around 11°C, so pack for cooler days.
Drier
Rainfall averages 41mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 17°C, so the water can feel cool.
Map
Compare Suo-Oshima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
December11°C average high
December is on the cooler side of Suo-Oshima's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
December41mm average rain
December is one of Suo-Oshima's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to March and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
December4 hours average sun
December is one of Suo-Oshima's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
December17°C average sea
December is below Suo-Oshima's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to October
Sea temperatures are usually near 24°C in this stretch, so swimming comfort is at its strongest.
December25 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
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