South Korea Jeju Island Weather in July — Climate Guide
July in Jeju Island is moderate
July is moderate for Jeju Island.
Monsoon peak (jangma) + Korean summer holidays. 280mm rain. Beach unreliable. Indoor focus.
Travel score
Jeju Island July Weather Stats
Avg High
28°C
Avg Low
22°C
Rainy Days
13
280mm total
Sunshine
6h
Daily avg
Humidity
80%
high
UV Index
9
Very high
Wind
8 km/h
Gusts 25
Sea Temp
24°C
swimming
Crowds
Busy
At attractions
July Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
22 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
32°C
Nighttime
23°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 25 km/h
Activities Recommended for July
July Travel Pros & Cons
Pros
- Korean summer holidays atmosphere
- Beach when sunny
- Indoor activities
Cons
- 280mm rain (wettest)
- Humid 80%
- Beach unreliable
- Hotels peak Korean summer
July Events & Festivals
- Monsoon peak
- Korean summer holidays late July
Jeju Island in July — Full Picture
Monsoon peak (jangma) + Korean summer holidays. 280mm rain. Beach unreliable. Indoor focus.
What to Wear & What to Pack
Hot + humid + monsoon. T-shirt + raincoat + UV.
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 July Hotel Picks
Frequently Asked Questions
Is July a good time to visit Jeju Island?
Jeju Island in July is moderate. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Jeju Island in July?
Jeju Island July averages a high of 28°C and a low of 22°C.
Does it rain much in Jeju Island in July?
Jeju Island July averages 280mm of rainfall over about 13 rainy days.
What should I wear in Jeju Island in July?
Hot + humid + monsoon. T-shirt + raincoat + UV.
What time are sunrise and sunset in Jeju Island in July?
Jeju Island July sunrise is 05:50 and sunset is 19:45, with 13h 55min of daylight.
What's the air quality like in Jeju Island in July?
Jeju Island July air quality (AQI) averages 35, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Jeju Island in July?
In July, Jeju Island is great for Indoor Manjanggul + Camellia Hill, Aewol cafés, Korean BBQ.
Is July peak season in Jeju Island?
Jeju Island July crowds are 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.