Cool
Average highs are around 15°C, so pack for cooler days.
Weather Guide
Jeju-do, South Korea Average Monthly Weather
Weather score42Mixed annual avg
Best months: August, September, July
Across the year, average daytime temperatures are around 18°C, sunshine averages 5.9h per day, and rainfall totals about 1583mm. Sea temperatures average 20°C across the year.
Annual weather
Annual averages
Temp
18°C
Rain
1583mm
Annual total
Sun
5.9h
Sea
20°C
Weather score
42
Mixed avg
Seasonal climate calendar
Trip feel
Drier
Rainfall averages 71mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Jeju-do, South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
November15°C average high
November is close to Jeju-do's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
November71mm average rain
November sits on the drier side of Jeju-do's year, which helps with sightseeing and transfers.
Driest monthsJanuary to March and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
November5.4 hours average sun
November sits close to Jeju-do's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
November21°C average sea
November is close to Jeju-do's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
November37 weather score
November scores below Jeju-do's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to October
These months have the strongest weather score in the monthly averages.
