Asia › South Korea › Jeju
30-year normals (1991-2020)
Jeju has a oceanic/humid subtropical climate, classified as Cfa in the Köppen system. The warmest month is June with an average high of 25°C, while the coldest month is December with lows dropping to -1°C. The annual temperature range of 26°C reflects moderate seasonal variation.
The driest month is December with only 3 rain days and 30mm of precipitation. For travellers, December through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 65% to 65% throughout the year.
Based on temperature and rainfall data, the best months to visit Jeju are April, August, March. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
Full Best Time to Visit GuideWarmest Month
25°C
June
Coldest Month
-1°C
December
Driest Month
3 days
December
Annual Range
26°C
-1° to 25°
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 8°C | 0°C | 3 | 1h | View |
| February | 12°C | 4°C | 3 | 3h | View |
| March | 16°C | 8°C | 4 | 4h | View |
| April | 20°C | 12°C | 5 | 6h | View |
| May | 23°C | 15°C | 6 | 7h | View |
| June | 25°C | 17°C | 6 | 7h | View |
| July | 23°C | 15°C | 6 | 7h | View |
| August | 20°C | 12°C | 5 | 6h | View |
| September | 16°C | 8°C | 4 | 4h | View |
| October | 12°C | 4°C | 3 | 3h | View |
| November | 8°C | 0°C | 3 | 1h | View |
| December | 7°C | -1°C | 3 | 1h | View |
January
3 rain days, 1h sun
February
3 rain days, 3h sun
March
4 rain days, 4h sun
April
5 rain days, 6h sun
May
6 rain days, 7h sun
June
6 rain days, 7h sun
July
6 rain days, 7h sun
August
5 rain days, 6h sun
September
4 rain days, 4h sun
October
3 rain days, 3h sun
November
3 rain days, 1h sun
December
3 rain days, 1h sun
Jeju in June
Data Sources for Jeju
Climate normals represent 30-year averages (1991-2020). Individual years may vary.