South Korea Jeju Island Weather in April — Climate Guide
April in Jeju Island is very-high
April is very-high for Jeju Island.
Cherry blossom early April peak. Most photogenic. Hotels surge 30-60%. Jeju City cherry blossom path + Hallim Park magical.
Travel score
Jeju Island April Weather Stats
Avg High
17°C
Avg Low
10°C
Rainy Days
9
100mm total
Sunshine
8h
Daily avg
Humidity
70%
moderate
UV Index
6
High
Wind
8 km/h
Gusts 22
Sea Temp
14°C
no swimming
Crowds
Very busy
At attractions
April Sunrise & Sunset
Air Quality
PM2.5
13 μg/m³
PM10
23 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
17°C
Nighttime
10°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 22 km/h
Activities Recommended for April
April Travel Pros & Cons
Pros
- Cherry blossom peak
- 17°C ideal
- Daylight 13h
- Hallasan azalea start
Cons
- Cherry blossom hotels surge
- Korean honeymoon peak
April Events & Festivals
- Cherry blossom early April (1-week peak)
- Hallasan azalea begins late month
Jeju Island in April — Full Picture
Cherry blossom early April peak. Most photogenic. Hotels surge 30-60%. Jeju City cherry blossom path + Hallim Park magical.
What to Wear & What to Pack
Spring perfect. Light jacket + sweater for evening.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current16.7°C
9.7°C
9/mo
Summer (Jun·Jul·Aug)
27°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 April Hotel Picks
Frequently Asked Questions
Is April a good time to visit Jeju Island?
Jeju Island in April is very-high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Jeju Island in April?
Jeju Island April averages a high of 17°C and a low of 10°C.
Does it rain much in Jeju Island in April?
Jeju Island April averages 100mm of rainfall over about 9 rainy days.
What should I wear in Jeju Island in April?
Spring perfect. Light jacket + sweater for evening.
What time are sunrise and sunset in Jeju Island in April?
Jeju Island April sunrise is 06:15 and sunset is 19:00, with 12h 45min of daylight.
What's the air quality like in Jeju Island in April?
Jeju Island April air quality (AQI) averages 38, rated Good. PM2.5 averages 13μg/m³.
What activities are recommended in Jeju Island in April?
In April, Jeju Island is great for Cherry blossom Jeju City path, Hallim Park, Hallasan azalea begin.
Is April peak season in Jeju Island?
Jeju Island April crowds are very busy and prices are peak. Advance reservations are strongly recommended.
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.