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Jeju Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Jeju.
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Climate overview of Jeju
From May to September you will experience the most rain, with rainfall amounts rising in July and August to 200 mm (7.9 in) and sometimes more than 400 mm (16 in) per month. In this period there is also the possibility that Jeju gets hit by a hurricane. The hurricane season runs from June to December in this region.
Jeju Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Jeju - and find the best time to visit.
Monthly Temperature in Jeju
In Jeju, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 9°C (48°F) in January.
Nighttime temperatures range from 25°C (77°F) in August to 5°C (41°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Jeju
Jeju experiences significant rainfall throughout the year, averaging 1452 mm (57 in) of precipitation annually. The seasons in Jeju bring significant changes in precipitation. The wettest month, June, receives heavy rainfall, with an average of 203 mm (8 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, November, experiences much less rainfall, totaling 74 mm (2.9 in) over 10 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Jeju Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Jeju
In Jeju, summer days are longer and more sunny, with daily sunshine hours peaking at 7.0 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 2.3 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Jeju by Month
The relative humidity is high throughout the year in Jeju.
The city experiences its highest humidity in July, reaching 78%. In January, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Jeju
The most comfortable overall weather for exploring Jeju is usually found in October. Conditions are generally least comfortable in January and February.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
mixed
Apr
mixed
May
very good
Jun
mixed
Jul
good
Aug
very good
Sep
very good
Oct
excellent
Nov
good
Dec
mixed
- Best overall: October
- Warmest weather: July and August
- Most sunshine: May
- Fewest rainy days: October and November
- Seasonal pattern: A distinct rainy season from June to September, with warm summers and cold winters
Frequently asked questions about the climate in Jeju
What is the best time to visit Jeju?
October typically offers the most optimal weather in Jeju. In contrast, January and February tend to have less optimal conditions. Jeju has a distinct rainy season from June to September, with warm summers and cold winters.
What temperatures can I expect in Jeju?
Daytime highs range from 9°C (48°F) in January to 29°C (84°F) in August. Nighttime lows range from 5°C (41°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Jeju get?
Annual rainfall is around 1452 mm (57 in). June is the wettest month with 203 mm (8 in), while November is the driest with 74 mm (2.9 in).
How sunny is Jeju?
Jeju receives around 1,846 hours of sunshine per year. May is the sunniest month with 211 hours, while January is the cloudiest with just 69 hours.
Jeju 3-Day Forecast
Jeju on the map
Jeju is highlighted - select any city to see its climate.
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Where to go in October - average daytime high across popular destinations.
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