The best times to visit Jeju for ideal weather are

April 9th to July 1st

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.


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Other Jeju Travel Info

Weather in Jeju

Temperature

Average temperatures in Jeju vary drastically. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 34th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Jeju, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 87.9°F (31.1°C) with temperatures rarely dropping below 77.9°F (25.5°C) at night.

Jeju Temperatures (Fahrenheit)

Key
High
Average
Low

Jeju Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Jeju Perceived Temperature (F)

Key
High
Average
Low

Jeju Perceived Temperature (C)

Key
High
Average
Low

 

Average Jeju Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan46.842.437.6
Feb49.844.639
Mar55.949.643
Apr63.556.950
May71.965.158.4
Jun76.371.166.6
Jul84.979.574.6
Aug85.980.676.3
Sep78.97469.2
Oct71.165.559.8
Nov60.955.650.3
Dec51.146.241.3

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan8.25.83.1
Feb9.973.9
Mar13.39.86.1
Apr17.513.810
May22.218.414.7
Jun24.621.719.2
Jul29.426.423.7
Aug29.92724.6
Sep26.123.320.7
Oct21.718.615.4
Nov16.113.110.2
Dec10.67.95.2


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Jeju are October, January, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid October. For example, on the week of October 15th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late June with an average of 3 days of significant precipitation the week of June 25th.

When can you find snow in Jeju? Weather stations report a bit of annual snow likely to be deepest around February, especially close to early to mid February. The best time to ski (if at all) in Jeju is often around around February 12th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Jeju.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Jeju (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan17%0.92.7
Feb24%1.23.1
Mar20%03.9
Apr22%04.3
May19%03.4
Jun29%07.5
Jul23%06.8
Aug29%012.6
Sep25%010.1
Oct12%03.4
Nov21%04
Dec23%0.82.8

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan172.36.9
Feb2437.9
Mar2009.9
Apr22010.9
May1908.6
Jun29019.1
Jul23017.3
Aug29032
Sep25025.7
Oct1208.6
Nov21010.2
Dec2327.1

 

Humidity and Wind

Jeju has some very humid months, with other comfortably humid months. The least humid month is March (51.1% relative humidity), and the most humid month is June (72.9%).

Wind in Jeju is usually calm. The windiest month is December, followed by January and March. December’s average wind speed of around 8.5 knots (9.8 MPH or 15.8 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late December where average top sustained speeds reach 12.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Jeju.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan7.9Gentle breeze11.3Significant breeze
Feb6.9Light breeze10.4Gentle breeze
Mar7Gentle breeze10.8Significant breeze
Apr6.5Light breeze10.5Gentle breeze
May5.7Light breeze9.4Significant breeze
Jun5.3Light breeze9.1Gentle breeze
Jul5.3Light breeze9.3Significant breeze
Aug5.5Light breeze9.3Gentle breeze
Sep5.5Light breeze9.1Significant breeze
Oct5.9Light breeze9.4Gentle breeze
Nov6.7Light breeze10.2Significant breeze
Dec8.5Gentle breeze12.2Significant breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan51.7%
Feb53.6%
Mar51.1%
Apr52.7%
May56.9%
Jun72.9%
Jul70.4%
Aug70%
Sep67%
Oct55.7%
Nov54.2%
Dec52.3%

 

Is it Safe to Travel to Jeju?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for South Korea; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 03, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Jeju, South Korea is January, followed by May and April. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Jeju in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 73.7 in December means 73.7% of the tourists vs. January.


Overall Jeju Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 73.5°F (23.1°C) and 51.5°F (10.8°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 7 to 9 days of precipitation per month. June – August is fairly slow season for tourism in Jeju, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 80.1°F (26.7°C) and 57.2°F (14°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 4 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Jeju to be enjoyable for warm weather travelers. The average high during this season is between 53.3°F (11.8°C) and 45.7°F (7.6°C). On average, it rains or snows a fair amount: 5 to 7 times per month. These times of year are the second busiest with tourists.

 

Best Times to TravelSouth Korea › Jeju, South Korea


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