Jeju Island Climate and Average Weather
Climate of Jeju Island: average temperatures, rainfall and seasons month by month.
Climate in Jeju Island month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 47° | 38° | 3,8 in | ★★★☆☆ |
| February | 49° | 40° | 6,1 in | ★★☆☆☆ |
| March | 56° | 45° | 7,0 in | ★★★☆☆ |
| April | 65° | 54° | 6,3 in | ★★★☆☆ |
| May | 71° | 60° | 5,7 in | ★★★★☆ |
| June | 77° | 69° | 10,0 in | ★★★☆☆ |
| July | 86° | 78° | 7,3 in | ★★★☆☆ |
| August | 87° | 78° | 6,1 in | ★★★☆☆ |
| September | 83° | 75° | 6,7 in | ★★★☆☆ |
| October | 72° | 64° | 5,9 in | ★★★☆☆ |
| November | 62° | 52° | 7,2 in | ★★★☆☆ |
| December | 52° | 42° | 3,4 in | ★★★☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Recent extremes in Jeju Island
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Jeju Island compares with nearby places
Annual averages, and the difference against Jeju Island.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Busan | 186 mi | 58°F | 36°F cooler | 54 in |
| Haeundae Beach | 189 mi | 59°F | 35°F cooler | 55 in |
| Incheon International Airport | 274 mi | 55°F | 39°F cooler | 49 in |
| Seoul | 282 mi | 55°F | 40°F cooler | 53 in |
| Gyeongbokgung Palace | 283 mi | 55°F | 40°F cooler | 53 in |
Climate by beach in Jeju Island
1 beaches mapped in this atlas
Best time to visit Jeju Island
Go in May. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and March - expect the least comfortable mix of heat, cold or rain.
What this means for Jeju Island
Today is about average for August. The forecast high of 85°F is in line with the 87°F typical for this month.
A 100% chance means rain is expected over most of the area. Plan indoor alternatives.
Visibility is down to 0,2 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 72°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and March - historically the least comfortable months here.
Summary
Jeju Island is an island in South Korea. Jeju Island is an island known for a volcanic island of waterfalls and trails.
Right now it is 85°F (29°C) in Jeju Island with mainly clear. It feels like 96°F. Today runs from 78°F to 85°F. Chance of precipitation is 100%. Sightseeing conditions score 4.2/10 - marginal.
The best time to visit Jeju Island is May. The climate is continental. January, February and March tend to be the least comfortable months. August is the warmest month with average highs near 87°F, while January is the coldest with lows near 38°F.
The closest major airport is Incheon International Airport (ICN), about 274 mi away. Nearby highlights include Hyeopjae Beach and Haeundae Beach.
In plain terms. Today is about average for August. The forecast high of 85°F is in line with the 87°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Jeju Island today at 7.7/10. Visibility is down to 0,2 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Jeju Island
| Type | Island |
|---|---|
| Country | South Korea |
| Continent | Asia |
| Coordinates | 33°29′58.6″N 126°31′52.3″E (33.4996, 126.5312) |
| Known for | a volcanic island of waterfalls and trails |
| Local time | 7:47 PM (UTC+09:00) |
| Best months | May |
| Climate | Continental |
Weather map for Jeju Island
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Jeju Island
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Jeju Island?
Jeju Island is an island in South Korea. Its coordinates are 33.4996, 126.5312. It lies in Asia.
What is the weather like in Jeju Island right now?
It is currently 85°F (29°C) with mainly clear. Humidity is 78% and wind is 6 mph.
When is the best time to visit Jeju Island?
May offer the most comfortable conditions in Jeju Island, which has a continental climate. January, February and March are usually the hardest months for outdoor plans.
What time zone is Jeju Island in?
Jeju Island observes Asia/Seoul (UTC+09:00). The local time is 7:47 PM.
What is the nearest airport to Jeju Island?
The closest airports are Incheon International Airport (ICN), 274 mi away.
What are the top things to do in Jeju Island?
Popular options include Hyeopjae Beach and Haeundae Beach.
What places are in Jeju Island?
Jeju Island covers 1 places in this atlas, including Hyeopjae Beach.
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| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 7:47 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
