Weather in Jeju 🇰🇷
Monthly weather averages & travel planning
July
Avg Temp
27°C
Rain Days
16 days
Sun Hours
9 hrs
Humidity
70%
Asia › 🇰🇷 South Korea › Jeju
Updated: March 2026
Is July a Good Time to Visit Jeju?
5/10
Fair
July is a fair time to visit Jeju (5/10). With 9 daily sunshine hours and only 16 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 4th sunniest of the year in Jeju. Culture-focused travellers and those who prefer lighter crowds will find July a practical choice, with prices running lower than peak August without sacrificing all the good weather. August offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 16 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs June:23°C avg high
Jeju in July rewards travelers with average highs of 27°C and overnight lows around 24°C. Expect around 16 rainy days, so a compact umbrella is worth carrying. With 9 daily sunshine hours on average, conditions are warm and inviting for outdoor exploration.
27°C
81°F
Avg High
24°C
75°F
Avg Low
16 days
225 mm total
Rain Days
9h
per day avg
Sunshine
70%
Moderate
Humidity
Temperature in Jeju in July
The narrow 3°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 70%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 17 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 81°F average high, 75°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Jeju in July
Morning24°CBefore the day warms up
Afternoon27°CPeak daytime temperature
Evening27°CAfter sunset cools down
Packing for Jeju in July means dressing for 27°C days and 24°C evenings. A light cotton tee with a casual overshirt works well at 27°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 24°C, a modest 3°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. With 16 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region.
Local tip: Temple and religious site visits require covered shoulders and knees in most of Jeju's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.
Events in Jeju in July
July has no major festivals or public holidays in Jeju, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Jeju in July
Based on 27°C average highs and 16 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Jeju in July
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 27°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)July is reliably dry enough for rural day trips without weather risk
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 16 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningJuly brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in July, with vendors setting up specifically for warm evenings
Why is Jeju warm in July?
Jeju's July heat is driven by the Asian summer monsoon system, as the low-pressure cell that forms over the heated landmass draws warm, humid air from the oceans. The result is temperatures averaging 27°C with high moisture in the air. Overnight temperatures remain elevated at 24°C, as clouds and humidity prevent the earth from radiating heat away after sunset. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Jeju in July
In July, Jeju experiences average highs of 27°C (81°F) and lows of 24°C (75°F). Expect around 16 rainy days and 9 hours of sunshine per day, with humidity averaging 70%. The 3°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 9, so sun protection is advisable on clear days.
Jeju typically sees 16 rainy days in July, with total precipitation of around 225mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Jeju typically sees 4-6 fewer rain days than July.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Jeju in July. Daytime temperatures of 27°C are pleasant, but the evening drop to 24°C means a jacket is essential if you plan to be out after dark. With 16 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
July is a reasonable time to visit Jeju. Expect 16 rainy days, so pack a light rain layer for flexibility. Average temperatures of 27°C make outdoor exploration comfortable during the dry periods. With 9 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Jeju in July is 27°C (81°F), and the average low is 24°C (75°F). The mean daily temperature is approximately 26°C (78°F). The day-to-night range of 3°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Jeju is generally April. April offers the most sunshine at 9 hours per day and only 9 rainy days. Average temperatures reach 16°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around April gives you the best chance of dry, bright weather.
July is shoulder or low season in Jeju, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 16 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In July, Jeju suits a range of activities thanks to mild temperatures around 27°C. With frequent rain, indoor activities and covered attractions are a smart choice. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 9 hours of sunshine, parks and waterfront walks are particularly enjoyable.
July ranks 4th sunniest of the year in Jeju, with an average 9 daily sunshine hours. The driest months are October, February, and November. August is the hottest month (28°C avg high); January is the coolest (7°C). From here, temperatures rise 1°C into August. Compared to last month (June: 23°C high, 13 rain days), July is warmer and wetter. July sits in the middle of the annual sunshine ranking for Jeju, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 7°C | 4°C | 9 | 5h | View |
| February | 8°C | 4°C | 8 | 7h | View |
| March | 11°C | 7°C | 10 | 8h | View |
| April | 16°C | 11°C | 9 | 9h | View |
| May | 20°C | 15°C | 10 | 9h | View |
| June | 23°C | 19°C | 13 | 8h | View |
| July | 27°C | 24°C | 16 | 9h | View |
| August | 28°C | 25°C | 17 | 10h | View |
| September | 25°C | 22°C | 13 | 8h | View |
| October | 20°C | 17°C | 7 | 9h | View |
| November | 15°C | 11°C | 8 | 7h | View |
| December | 10°C | 6°C | 8 | 6h | View |
January
9 rain days, 5h sun
7°4°
February
8 rain days, 7h sun
8°4°
March
10 rain days, 8h sun
11°7°
April
9 rain days, 9h sun
16°11°
May
10 rain days, 9h sun
20°15°
June
13 rain days, 8h sun
23°19°
July
16 rain days, 9h sun
27°24°
August
17 rain days, 10h sun
28°25°
September
13 rain days, 8h sun
25°22°
October
7 rain days, 9h sun
20°17°
November
8 rain days, 7h sun
15°11°
December
8 rain days, 6h sun
10°6°
Other Months in Jeju
Plan Your Trip to Jeju
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Jeju
Climate normals represent 30-year averages (1991-2020). Individual years may vary.