The best times to visit Jeju City 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.

 

 


Other Jeju City Travel Info

Weather in Jeju City

Temperature

Average temperatures in Jeju City 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 City, 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 City Temperatures (Fahrenheit)

Key
High
Average
Low

Jeju City 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 City Perceived Temperature (F)

Key
High
Average
Low

Jeju City Perceived Temperature (C)

Key
High
Average
Low

 

Average Jeju City 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

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 46.8 42.4 37.6
Feb 49.8 44.6 39
Mar 55.9 49.6 43
Apr 63.5 56.9 50
May 71.9 65.1 58.4
Jun 76.3 71.1 66.6
Jul 84.9 79.5 74.6
Aug 85.9 80.6 76.3
Sep 78.9 74 69.2
Oct 71.1 65.5 59.8
Nov 60.9 55.6 50.3
Dec 51.1 46.2 41.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.2 5.8 3.1
Feb 9.9 7 3.9
Mar 13.3 9.8 6.1
Apr 17.5 13.8 10
May 22.2 18.4 14.7
Jun 24.6 21.7 19.2
Jul 29.4 26.4 23.7
Aug 29.9 27 24.6
Sep 26.1 23.3 20.7
Oct 21.7 18.6 15.4
Nov 16.1 13.1 10.2
Dec 10.6 7.9 5.2

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Jeju City 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 City? 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 City 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 City.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 17% 0.9 2.7
Feb 24% 1.2 3.1
Mar 20% 0 3.9
Apr 22% 0 4.3
May 19% 0 3.4
Jun 29% 0 7.5
Jul 23% 0 6.8
Aug 29% 0 12.6
Sep 25% 0 10.1
Oct 12% 0 3.4
Nov 21% 0 4
Dec 23% 0.8 2.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 17 2.3 6.9
Feb 24 3 7.9
Mar 20 0 9.9
Apr 22 0 10.9
May 19 0 8.6
Jun 29 0 19.1
Jul 23 0 17.3
Aug 29 0 32
Sep 25 0 25.7
Oct 12 0 8.6
Nov 21 0 10.2
Dec 23 2 7.1

 

Humidity and Wind

Jeju City 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 City 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 City.

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.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 7.9 Gentle breeze 11.3 Significant breeze
Feb 6.9 Light breeze 10.4 Gentle breeze
Mar 7 Gentle breeze 10.8 Significant breeze
Apr 6.5 Light breeze 10.5 Gentle breeze
May 5.7 Light breeze 9.4 Significant breeze
Jun 5.3 Light breeze 9.1 Gentle breeze
Jul 5.3 Light breeze 9.3 Significant breeze
Aug 5.5 Light breeze 9.3 Gentle breeze
Sep 5.5 Light breeze 9.1 Significant breeze
Oct 5.9 Light breeze 9.4 Gentle breeze
Nov 6.7 Light breeze 10.2 Significant breeze
Dec 8.5 Gentle breeze 12.2 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 51.7%
Feb 53.6%
Mar 51.1%
Apr 52.7%
May 56.9%
Jun 72.9%
Jul 70.4%
Aug 70%
Sep 67%
Oct 55.7%
Nov 54.2%
Dec 52.3%

 

Is it Safe to Travel to Jeju City?

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 City, 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 City 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 City 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 City, 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 City 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 City, South Korea