South Korea Jeju Island Weather in June — Climate Guide
June in Jeju Island is moderate
June is moderate for Jeju Island.
Korean monsoon (jangma) season starts mid-June. 200mm rain. Hotels affordable. Hallasan azalea continues early June.
Travel score
Jeju Island June Weather Stats
Avg High
24°C
Avg Low
18°C
Rainy Days
11
200mm total
Sunshine
6h
Daily avg
Humidity
80%
high
UV Index
8
Very high
Wind
8 km/h
Gusts 20
Sea Temp
21°C
swimming
Crowds
Moderate
At attractions
June Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
22 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
27°C
Nighttime
18°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 20 km/h
Activities Recommended for June
June Travel Pros & Cons
Pros
- Hotels 30% off summer
- Less crowded
- Hallasan azalea continues early June
- Sea swimming possible
Cons
- 200mm monsoon rain
- Humid 80%
- Beach unreliable
June Events & Festivals
- Korean monsoon (jangma) begins
- Hallasan azalea continues early June
Jeju Island in June — Full Picture
Korean monsoon (jangma) season starts mid-June. 200mm rain. Hotels affordable. Hallasan azalea continues early June.
What to Wear & What to Pack
Hot + monsoon. T-shirt + raincoat.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
16.7°C
9.7°C
9/mo
Summer (Jun·Jul·Aug)
Current27°C
21.3°C
11.7/mo
Autumn (Sep·Oct·Nov)
21.7°C
14.3°C
7.7/mo
Winter (Dec·Jan·Feb)
9.3°C
3.3°C
7.7/mo
Jeju Island Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 2° | 8d·60mm | 5h | 65% | 2 | Quiet | Low season | |
| 9° | 3° | 8d·65mm | 6h | 68% | 3 | Quiet | Low season | |
| 12° | 5° | 9d·90mm | 7h | 70% | 5 | Moderate | Shoulder | |
| April (Best) | 17° | 10° | 9d·100mm | 8h | 70% | 6 | Very busy | Peak |
| May (Best) | 21° | 14° | 9d·100mm | 9h | 75% | 7 | Very busy | Peak |
| 24° | 18° | 11d·200mm | 6h | 80% | 8 | Moderate | Shoulder | |
| 28° | 22° | 13d·280mm | 6h | 80% | 9 | Busy | Peak | |
| 29° | 24° | 11d·200mm | 7h | 78% | 10 | Very busy | Peak | |
| 26° | 19° | 9d·200mm | 7h | 75% | 7 | Busy | Peak | |
| October (Best) | 22° | 14° | 7d·100mm | 8h | 65% | 5 | Very busy | Peak |
| November (Best) | 17° | 10° | 7d·80mm | 7h | 60% | 3 | Busy | Peak |
| 11° | 5° | 7d·50mm | 6h | 60% | 2 | Moderate | Shoulder |
View Other Months
Jeju Island June Hotel Picks
Frequently Asked Questions
Is June a good time to visit Jeju Island?
Jeju Island in June is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Jeju Island in June?
Jeju Island June averages a high of 24°C and a low of 18°C.
Does it rain much in Jeju Island in June?
Jeju Island June averages 200mm of rainfall over about 11 rainy days.
What should I wear in Jeju Island in June?
Hot + monsoon. T-shirt + raincoat.
What time are sunrise and sunset in Jeju Island in June?
Jeju Island June sunrise is 05:45 and sunset is 19:35, with 13h 50min of daylight.
What's the air quality like in Jeju Island in June?
Jeju Island June air quality (AQI) averages 35, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Jeju Island in June?
In June, Jeju Island is great for Hallasan azalea finish, Manjanggul indoor, Aewol cafés indoor.
Is June peak season in Jeju Island?
Jeju Island June crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Jeju Island
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.