Weather in Jeju 🇰🇷
Monthly weather averages & travel planning
April
Avg Temp
16°C
Rain Days
9 days
Sun Hours
9 hrs
Humidity
70%
Asia › 🇰🇷 South Korea › Jeju
Updated: March 2026
Is April a Good Time to Visit Jeju?
6/10
Good
April is a good time to visit Jeju (6/10). With 9 daily sunshine hours and only 9 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 2nd sunniest of the year in Jeju. Culture-focused travellers and those who prefer lighter crowds will find April a practical choice, with prices running lower than peak August without sacrificing all the good weather. March offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Jeju's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. 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 March:11°C avg high
Jeju in April rewards travelers with average highs of 16°C and overnight lows around 11°C. Expect around 9 rainy days, so a compact umbrella is worth carrying. With 9 daily sunshine hours on average, conditions are comfortable for sightseeing at a relaxed pace.
16°C
61°F
Avg High
11°C
52°F
Avg Low
9 days
121 mm total
Rain Days
9h
per day avg
Sunshine
70%
Moderate
Humidity
Temperature in Jeju in April
The narrow 5°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 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 18 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 61°F average high, 52°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 April
Morning11°CBefore the day warms up
Afternoon16°CPeak daytime temperature
Evening14°CAfter sunset cools down
Packing for Jeju in April means dressing for 16°C days and 11°C evenings. A mid-weight jacket over a sweater handles 16°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 11°C, a modest 5°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 9 potential rainy days.
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 April
April 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 April
Based on 16°C average highs and 9 rainy days
- Light jacket or cardigan for cooler evenings
- Mix of short and long-sleeve layers
- Comfortable walking shoes with good arch support
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Jeju in April
- Explore the old town's cobblestone backstreetsMorning (9-11am)At 16°C, conditions are pleasant for unhurried exploration on foot
- Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
- Bicycle rental for a half-day city circuitMid-morning startMild 16°C temperatures are ideal for extended cycling without excessive effort
- Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningApril brings distinct seasonal changes to public green spaces worth exploring
- Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmApril seasonal produce is at peak availability, offering dishes not found at other times of year
Why is Jeju mild in April?
April marks the transition into warmer conditions in Jeju, as the sun angle climbs and day length extends. Temperatures averaging 16°C by day and 11°C overnight reflect a city shaking off winter: the morning air still carries a cool edge, but afternoons are noticeably warmer than even four weeks prior. At 33 degrees north latitude, spring is one of the most dynamic periods in the annual cycle, with weekly temperature changes that can be larger than the month-to-month shifts of summer. This volatility is part of the appeal: Jeju in April has a freshness and energy that peak-summer heat tends to mute. Layers remain essential, but there are reliable pockets of warmth that reward patience. 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 April
In April, Jeju experiences average highs of 16°C (61°F) and lows of 11°C (52°F). Expect around 9 rainy days and 9 hours of sunshine per day, with humidity averaging 70%. The 5°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 6, so sun protection is advisable on clear days.
Jeju typically sees 9 rainy days in April, with total precipitation of around 121mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Jeju typically sees 4-6 fewer rain days than April.
Pack a warm jacket, sweaters, and layering pieces for Jeju in April. Temperatures can drop to 11°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is important with 9 rainy days expected. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.
Yes, April is an excellent time to visit Jeju. With 9 daily sunshine hours and only 9 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 16°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Jeju in April is 16°C (61°F), and the average low is 11°C (52°F). The mean daily temperature is approximately 14°C (56°F). The day-to-night range of 5°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.
April is shoulder or low season in Jeju, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 9 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 April, Jeju suits a range of activities thanks to cool conditions around 16°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. 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.
April ranks 2nd 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 4°C into May. Compared to last month (March: 11°C high, 10 rain days), April is warmer and drier. April is among the top three sunniest months to visit Jeju.
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.