Jeju Island: Weather Guide & Climate
Complete month-by-month weather guide: Jeju Island. Best time to visit: April, May, September, October. Plan your trip with detailed climate data.
Climate Overview
Jeju Island has a warm climate with average yearly highs of 18°C, lows of 13°C, and approximately 11 rainy days per month.
The best time to visit Jeju Island is during April, May, September, October, when temperatures are comfortable and rainfall is moderate
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Air Quality
Best Time
Apr, May, Sep, Oct
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 9°C | 6°C | 12 | Good |
| February | 10°C | 5°C | 11 | Good |
| March | 13°C | 7°C | 9 | Good |
| April | 14°C | 8°C | 7 | Excellent (best) |
| May | 21°C | 15°C | 9 | Excellent (best) |
| June | 25°C | 20°C | 12 | Good |
| July | 25°C | 22°C | 23 | Wet |
| August | 30°C | 26°C | 14 | Wet |
| September | 24°C | 20°C | 18 | Excellent (best) |
| October | 19°C | 15°C | 4 | Excellent (best) |
| November | 15°C | 11°C | 7 | Good |
| December | 9°C | 5°C | 8 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 9°C
Low: 5°C
Rainy days: 10 days/month
Spring
Mar–May
High: 16°C
Low: 10°C
Rainy days: 8 days/month
Summer
Jun–Aug
High: 27°C
Low: 23°C
Rainy days: 16 days/month
Autumn
Sep–Nov
High: 19°C
Low: 15°C
Rainy days: 10 days/month
Month-by-Month Weather Table
January
February
March
April
BestMay
BestJune
July
August
September
BestOctober
BestNovember
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 9°C | 6°C | 12 | Good | View Details → |
| February | 10°C | 5°C | 11 | Good | View Details → |
| March | 13°C | 7°C | 9 | Good | View Details → |
| April (best) | 14°C | 8°C | 7 | Excellent | View Details → |
| May (best) | 21°C | 15°C | 9 | Excellent | View Details → |
| June | 25°C | 20°C | 12 | Good | View Details → |
| July | 25°C | 22°C | 23 | Wet | View Details → |
| August | 30°C | 26°C | 14 | Wet | View Details → |
| September (best) | 24°C | 20°C | 18 | Excellent | View Details → |
| October (best) | 19°C | 15°C | 4 | Excellent | View Details → |
| November | 15°C | 11°C | 7 | Good | View Details → |
| December | 9°C | 5°C | 8 | Good | View Details → |
Jeju Island
Volcanic island, including waterfalls, Hallasan Mountain hike and Seongsan Sunrise Peak, lava tubes, beaches, and Hallasan crater.
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Common Questions
What type of climate does Jeju Island have?
Jeju Island has a Warm climate with average yearly temperatures of 18°C (highs) and 13°C (lows).
When is the best time to visit Jeju Island?
The best time to visit Jeju Island is during April, May, September, October, when temperatures average around 14°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Jeju Island?
The hottest month in Jeju Island is August with average highs of 30°C, while the coldest is February with average lows of 5°C.
When is the rainy season in Jeju Island?
Jeju Island sees the most rain in July (23 rainy days), while October is the driest month (4 rainy days).
More Jeju Island Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Jeju Island: top things to do, itineraries, and typical costs.