Island, South Korea
Jeju weather by month and the best time to visit
When to go to Jeju
Late Mar–May has rapeseed flowers and mild weather; Sep–Oct is clear. Jul–Aug is humid with typhoons; winter winds are strong and ferries and flights cancel.
Jeju weather by month
Average daily high, rainfall and conditions.
- Jan9°50 mm
- Feb10°66 mm
- Mar12°90 mm
- Apr15°136 mm
- May18°141 mm
- Jun22°192 mm
- Jul26°240 mm
- Aug28°261 mm
- Sep25°185 mm
- Oct21°89 mm
- Nov16°72 mm
- Dec11°56 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 9°C48°F | 6°C44°F | 50 mm | 77% | Cold |
| February | 10°C49°F | 7°C44°F | 66 mm | 75% | Cold |
| March | 12°C53°F | 9°C47°F | 90 mm | 74% | Cool |
| April | 15°C59°F | 12°C53°F | 136 mm | 79% | Cool |
| May | 18°C65°F | 16°C60°F | 141 mm | 85% | Pleasant |
| June | 22°C71°F | 20°C68°F | 192 mm | 89% | Rainy |
| July | 26°C78°F | 24°C76°F | 240 mm | 90% | Rainy |
| August | 28°C82°F | 26°C79°F | 261 mm | 84% | Rainy |
| September | 25°C76°F | 23°C73°F | 185 mm | 81% | Rainy |
| October | 21°C69°F | 18°C65°F | 89 mm | 74% | Pleasant |
| November | 16°C61°F | 13°C56°F | 72 mm | 74% | Cool |
| December | 11°C52°F | 8°C47°F | 56 mm | 76% | Cool |
Best months across South Korea
| Place | Best months | Warmest month |
|---|---|---|
| Seoul | Apr–May, Sep–Nov | Aug (28°C) |
| Busan | Apr–May, Sep–Oct | Aug (27°C) |
| Jeju | Apr–May, Sep–Oct | Aug (28°C) |
| Gyeongju | Apr–May, Oct–Nov | Aug (28°C) |
| Seogwipo | Apr–May, Sep–Oct | Aug (28°C) |
| Incheon | Apr–May, Sep–Oct | Aug (28°C) |
| Jeonju | Apr–May, Sep–Nov | Aug (29°C) |
| Sokcho | May–Jun, Sep–Oct | Aug (27°C) |
| Gangneung | May–Jun, Sep–Oct | Aug (27°C) |
| Daegu | Apr–May, Sep–Oct | Aug (30°C) |
| Yeosu | Apr–May, Sep–Oct | Aug (30°C) |
Quick answers
What is the best month to visit Jeju?
Apr–May, Sep–Oct. Late Mar–May has rapeseed flowers and mild weather; Sep–Oct is clear. Jul–Aug is humid with typhoons; winter winds are strong and ferries and flights cancel.
When is the rainy season in Jeju?
Rain peaks in August with about 261 mm. Months with 150 mm or more: Jun–Sep.
What is the hottest month in Jeju?
August, with average highs of 28°C (82°F).
How cold does Jeju get?
The coolest nights are in January, averaging 6°C (44°F).
More about Jeju
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Sources
- NASA POWER climatology (2001–2020)
- Visit Jeju
- Jeju International Airport (Korea Airports Corporation)
- Jeju Olle Trail
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.