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When is the best time to visit Jeju?
In general the best time to visit Jeju is probably August, when the weather is usually great. The hottest months are July, August, September, while the coldest months are January, February, December.
Depending on the activities you want to experience, you may choose different months to visit:
- The best time for a sunbathing holiday is July, August, September. Average maximum temperatures are up to +29°C in August and it has 3 sunny days on average.
- In general, it’s pleasant to walk and do outdoor activities during May - October.
- If you want to avoid wet weather, then your choice is June, July, August with the lowest chance of rain.
Average weather in Jeju in different months
This is the average weather in Jeju for each month based on historic data:
April, October usually has good weather. Average maximum temperature reaches +21°C during October.
In January, February, March, May, June, July, August, September, November, December the weather is average. Expect around 153 rainy days, and the precipitation amounts to approximately 193 mm in June.
Climate in Jeju
Here is the detailed breakdown of the climate in Jeju for each month:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum Temperature | |||||||||||
| +22°C | +23°C | +26°C | +27°C | +32°C | +31°C | +35°C | +36°C | +32°C | +29°C | +25°C | +21°C |
| Average Maximum Temperature | |||||||||||
| +8°C | +9°C | +12°C | +16°C | +20°C | +23°C | +28°C | +29°C | +25°C | +21°C | +15°C | +10°C |
| Minimum Temperature | |||||||||||
| -6°C | -4°C | -1°C | +4°C | +8°C | +12°C | +18°C | +18°C | +14°C | +7°C | +2°C | -2°C |
| Avg. water temperature | |||||||||||
| - | - | - | - | - | - | - | - | - | - | - | - |
| Humidity, % | |||||||||||
| 66 | 66 | 68 | 71 | 75 | 82 | 84 | 80 | 77 | 69 | 67 | 65 |
| Rain, mm | |||||||||||
| 66 | 68 | 92 | 99 | 106 | 193 | 186 | 159 | 166 | 79 | 78 | 59 |
| Snow, mm | |||||||||||
| 8 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Average wind speed, m/s | |||||||||||
| 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 |
| Sunny Days | |||||||||||
| 2 | 3 | 6 | 8 | 9 | 4 | 3 | 3 | 4 | 7 | 5 | 3 |
| Cloud Days | |||||||||||
| 12 | 10 | 10 | 10 | 10 | 11 | 10 | 7 | 8 | 11 | 10 | 11 |
| Rainy Days | |||||||||||
| 13 | 13 | 14 | 13 | 12 | 15 | 18 | 20 | 18 | 12 | 15 | 15 |
| Snowy Days | |||||||||||
| 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Average Temperature
Here are the average maximum and minimum temperatures in Jeju during the whole year:
The hottest month in Jeju is August with average maximum temperature going up to +29°C. The coldest month is January with the lowest temperatures of +4°C.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Jeju looks throughout the year, in %:
The most humid month in Jeju is July with average humidity going up to 84%. The least humid month is December with an average humidity of 65%.
Rain
Amount of rainfall in mm. in Jeju during the whole year based on historical data:
The sunniest and driest month is May with approximately 9 sunny days and a total precipitation of around 106 mm. The rainiest and wettest month is June with approximately 15 rainy days and 193 mm of total precipitation.
Snow
Amount of snow in mm. in Jeju during the whole year based on historical data:
The snowiest month is January with approximately 4 snowy days.
FAQ
Frequently asked questions about the weather in Jeju:
What is the hottest month in Jeju?
The hottest month in Jeju is August with average maximum temperature of +29°C.
What is the coldest month in Jeju?
The coldest month in Jeju is January with minimum temperatures of +4°C.
Is Jeju worth visiting in winter?
Winter in Jeju could be a good time to visit, as the weather is generally ok.
When does it rain the least in Jeju?
if you're looking to visit Jeju when it rains the least, you should plan your trip for June, July, September. During this time, rainfall is rare with the driest month being December with only 59 mm of rain.
Other cities in South Korea
Check out the weather for other cities in South Korea.
Monthly weather in Jeju
Source of the data
For this page, we’ve looked at the typical weather in Jeju, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
