Weather in Jeju 🇰🇷
Monthly weather averages & travel planning
October
Avg Temp
20°C
Rain Days
7 days
Sun Hours
9 hrs
Humidity
70%
Asia › 🇰🇷 South Korea › Jeju
Updated: March 2026
Is October a Good Time to Visit Jeju?
7/10
Good
October is a good time to visit Jeju (7/10). With 9 daily sunshine hours and only 7 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 5th sunniest of the year in Jeju. Culture-focused travellers and those who prefer lighter crowds will find October a practical choice, with prices running lower than peak August without sacrificing all the good weather. September 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 September:25°C avg high
Jeju in October rewards travelers with average highs of 20°C and overnight lows around 17°C. Expect around 7 rainy days, making it one of the drier periods in the city. With 9 daily sunshine hours on average, conditions are comfortable for sightseeing at a relaxed pace.
20°C
68°F
Avg High
17°C
63°F
Avg Low
7 days
92 mm total
Rain Days
9h
per day avg
Sunshine
70%
Moderate
Humidity
Temperature in Jeju in October
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 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 19 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 68°F average high, 63°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 October
Morning17°CBefore the day warms up
Afternoon20°CPeak daytime temperature
Evening20°CAfter sunset cools down
Packing for Jeju in October means dressing for 20°C days and 17°C evenings. A light cotton tee with a casual overshirt works well at 20°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 17°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.
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 October
October 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 October
Based on 20°C average highs and 7 rainy days
- Light jacket or cardigan for cooler evenings
- Mix of short and long-sleeve layers
- Comfortable walking shoes with good arch support
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Jeju in October
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 20°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)October is reliably dry enough for rural day trips without weather risk
- 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 morningOctober 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-1pmOctober seasonal produce is at peak availability, offering dishes not found at other times of year
Why is Jeju mild in October?
October brings the first meaningful shift toward cooler conditions in Jeju, as the sun angle drops and day length shortens. Temperatures averaging 20°C by day and 17°C overnight are still comfortable by most standards, but the trend is clearly downward. At 33 degrees north latitude, autumn light has a particular quality: lower in the sky and warmer in tone, it gives the city a photogenic quality quite different from summer. Conditions remain excellent for outdoor activity, and crowds thin compared to the summer peak. 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 October
In October, Jeju experiences average highs of 20°C (68°F) and lows of 17°C (63°F). Expect around 7 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 6, so sun protection is advisable on clear days.
Jeju typically sees 7 rainy days in October, with total precipitation of around 92mm. This makes October one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Jeju typically sees 4-6 fewer rain days than October.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Jeju in October. Daytime temperatures of 20°C are pleasant, but the evening drop to 17°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 7 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, October is an excellent time to visit Jeju. With 9 daily sunshine hours and only 7 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 20°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 October is 20°C (68°F), and the average low is 17°C (63°F). The mean daily temperature is approximately 19°C (65°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.
October is shoulder or low season in Jeju, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 7 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 October, Jeju suits a range of activities thanks to mild temperatures around 20°C. With few rainy days, outdoor activities are highly recommended. 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.
October ranks 5th 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 fall 5°C into November. Compared to last month (September: 25°C high, 13 rain days), October is cooler and drier. October 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.