Jeju Island Weather
Jeju Island weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Apr, May, Oct and Nov.
Jeju Island current weather
Jeju Island now (local time 16:00)
23°C
Clear
- Feels like
- 24°
- Humidity
- 69%
- Wind
- 13 km/h
Next 7 days · what to wear
16° – 25°C
Rain likely on 3 of 7 days
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; it's wet, so pack a compact umbrella.
Jeju Island 14-day forecast
Today
10/4
🌦️
24°
19°
💧76%
Mon
10/5
⛅
21°
19°
💧100%
Tue
10/6
⛅
21°
19°
💧45%
Wed
10/7
⛅
22°
17°
💧12%
Thu
10/8
☁️
23°
16°
💧2%
Fri
10/9
⛅
23°
18°
💧18%
Sat
10/10
🌦️
25°
20°
💧32%
Sun
10/11
🌦️
24°
20°
💧18%
Mon
10/12
🌤️
24°
20°
💧33%
Tue
10/13
🌤️
24°
20°
💧35%
Wed
10/14
🌦️
25°
20°
💧25%
Thu
10/15
🌦️
25°
21°
💧13%
Fri
10/16
🌦️
23°
20°
💧24%
Sat
10/17
🌦️
21°
19°
💧30%
Best time to visit Jeju Island
On temperature and rainfall, the most comfortable months in Jeju Island are Apr, May, Oct and Nov. The hottest month is August (average high 30°C) and the coldest is January (average low 3°C).
Jeju Island climate by month
| Month | Avg high | Avg low | Rain | Humidity | vs Hong Kong |
|---|---|---|---|---|---|
| Jan | 8°C | 3°C | 128 mm | 77% | -11°C |
| Feb | 10°C | 4°C | 114 mm | 77% | -11°C |
| Mar | 14°C | 7°C | 152 mm | 75% | -10°C |
| AprBest | 17°C | 11°C | 125 mm | 74% | -10°C |
| MayBest | 22°C | 15°C | 158 mm | 76% | -8°C |
| Jun | 25°C | 20°C | 227 mm | 84% | -6°C |
| Jul | 29°C | 24°C | 263 mm | 87% | -3°C |
| Aug | 30°C | 25°C | 228 mm | 84% | -1°C |
| Sep | 26°C | 22°C | 425 mm | 85% | -4°C |
| OctBest | 21°C | 16°C | 86 mm | 77% | -8°C |
| NovBest | 16°C | 11°C | 153 mm | 76% | -9°C |
| Dec | 9°C | 5°C | 86 mm | 75% | -11°C |
Data: Open-Meteo historical weather, 2020–2024 averages (ERA5); Hong Kong comparison uses HKO 1991–2020 normals.
Jeju Island weather month by month: what to wear
Jeju Island in OctoberBest monthThis month
October in Jeju Island is mild and cool: average highs of 21°C and lows of 16°C, around 86 mm of rain (some rain) and 77% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.
Jeju Island in NovemberBest month
November in Jeju Island is mild and cool: average highs of 16°C and lows of 11°C, around 153 mm of rain (wet) and 76% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; it's wet, so pack a compact umbrella.
Jeju Island in December
December in Jeju Island is cold: average highs of 9°C and lows of 5°C, around 86 mm of rain (some rain) and 75% humidity — about 11°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Jeju Island in January
January in Jeju Island is cold: average highs of 8°C and lows of 3°C, around 128 mm of rain (some rain) and 77% humidity — about 11°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Jeju Island in February
February in Jeju Island is cold: average highs of 10°C and lows of 4°C, around 114 mm of rain (some rain) and 77% humidity — about 11°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Jeju Island in March
March in Jeju Island is chilly: average highs of 14°C and lows of 7°C, around 152 mm of rain (wet) and 75% humidity — about 10°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker; it's wet, so pack a compact umbrella.
Jeju Island in AprilBest month
April in Jeju Island is mild and cool: average highs of 17°C and lows of 11°C, around 125 mm of rain (some rain) and 74% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater.
Jeju Island in MayBest month
May in Jeju Island is pleasantly warm: average highs of 22°C and lows of 15°C, around 158 mm of rain (wet) and 76% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; it's wet, so pack a compact umbrella.
Jeju Island in June
June in Jeju Island is pleasantly warm: average highs of 25°C and lows of 20°C, around 227 mm of rain (wet) and 84% humidity — about 6°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella.
Jeju Island in July
July in Jeju Island is warm to hot: average highs of 29°C and lows of 24°C, around 263 mm of rain (very wet) and 87% humidity — about 3°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Jeju Island in August
August in Jeju Island is warm to hot: average highs of 30°C and lows of 25°C, around 228 mm of rain (wet) and 84% humidity — about the same as Hong Kong.
👕 T-shirts, shorts and breathable fabrics; sunscreen and water; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Jeju Island in September
September in Jeju Island is warm to hot: average highs of 26°C and lows of 22°C, around 425 mm of rain (very wet) and 85% humidity — about 4°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
FAQ
›What is the best time to visit Jeju Island?
On temperature and rainfall, the most comfortable months in Jeju Island are Apr, May, Oct and Nov. The hottest month is August (average high 30°C) and the coldest is January (average low 3°C).
›What's the weather like in Jeju Island in October, and what should I wear?
October in Jeju Island is mild and cool: average highs of 21°C and lows of 16°C, around 86 mm of rain (some rain) and 77% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.
›What's the weather like in Jeju Island in November, and what should I wear?
November in Jeju Island is mild and cool: average highs of 16°C and lows of 11°C, around 153 mm of rain (wet) and 76% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater; it's wet, so pack a compact umbrella.
›When is the rainy season in Jeju Island?
Jeju Island is wettest in September, with about 425 mm on average, and driest in October, with about 86 mm.
›How cold does Jeju Island get? Does it snow?
The coldest month is January, averaging 8°C by day and 3°C at night. Early mornings get close to freezing; snow is occasional.
Planning a trip to Jeju Island?
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Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: August; coldest: January.