The Jeju historical weather page is built for travel planning and destination comparison, covering monthly temperature, rainfall, rainy days, and sunshine trends from 2015 through the latest complete month. Best time to visit Jeju. Searches for the best time to visit Jeju usually need monthly temperature, rainfall, and rainy-day context. Use the month-by-month view to find comfortable travel windows instead of relying only on annual averages. Jeju average temperature by month. For queries such as Jeju weather in April, Jeju temperature in August, or Jeju historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Jeju weather patterns. Jeju, 제주특별자치도 sits in a subtropical climate band. Check the full monthly range because the warmer season (June to August) and cooler season (December to February) can feel very different for travel planning. Jeju rainfall and seasonality. For outdoor plans in Jeju, compare both total rainfall and rainy days by month. Shoulder periods (March-May and September-November) are useful for balancing temperature comfort, rainfall risk, and travel demand. When to compare Jeju with other destinations. If you are choosing between several cities, compare Jeju with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer.
Jeju Historical Weather Since 2015 | Latest Complete Month Data
Jeju historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references. The Jeju historical weather page is built for travel planning and destination comparison, covering monthly temperature, rainfall, rainy days, and sunshine trends from 2015 through the latest complete month. Best time to visit Jeju. Searches for the best time to visit Jeju usually need monthly temperature, rainfall, and rainy-day context. Use the month-by-month view to find comfortable travel windows instead of relying only on annual averages. Jeju average temperature by month. For queries such as Jeju weather in April, Jeju temperature in August, or Jeju historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Jeju weather patterns. Jeju, 제주특별자치도 sits in a subtropical climate band. Check the full monthly range because the warmer season (June to August) and cooler season (December to February) can feel very different for travel planning. Jeju rainfall and seasonality. For outdoor plans in Jeju, compare both total rainfall and rainy days by month. Shoulder periods (March-May and September-November) are useful for balancing temperature comfort, rainfall risk, and travel demand. When to compare Jeju with other destinations. If you are choosing between several cities, compare Jeju with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer. Jeju historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references.
Jeju monthly fact table
These facts are generated from historical monthly averages for 2015-01-01/2026-05-31, ready for best-month, rainy-season, hottest-month, and coldest-month answers.
- Recommended month: May
- Hottest month: August
- Coldest month: January
- Rainiest month: September
| Month | Avg Temp | Precip | Rainy Days | Sunshine |
|---|
| January | 5.5°C | 94 mm | 17.4 | 5.5 h |
| February | 6.1°C | 93 mm | 14.3 | 6.4 h |
| March | 10°C | 128 mm | 15.1 | 7.8 h |
| April | 14.3°C | 142 mm | 13.7 | 8.6 h |
| May | 18.4°C | 148 mm | 14.6 | 9.3 h |
| June | 22.1°C | 215 mm | 18.2 | 8 h |
| July | 26.3°C | 239 mm | 22.5 | 8.7 h |
| August | 27.4°C | 237 mm | 22.3 | 10.4 h |
| September | 23.8°C | 340 mm | 23.1 | 7.9 h |
| October | 18.6°C | 168 mm | 16.7 | 8 h |
| November | 13.2°C | 112 mm | 15.5 | 6.7 h |
| December | 7.7°C | 85 mm | 18.3 | 5.3 h |
Source: Open-Meteo Archive; generated: 2026-06-07.
Jeju historical weather travel guide
When is the best time to visit Jeju?
Based on historical monthly averages for 2015-01-01/2026-05-31, the recommended month for Jeju is May, with an average temperature around 18.4°C, average precipitation around 148 mm, and a travel comfort score of 93.
Is it hot in Jeju in summer?
The hottest month in Jeju historical averages is August, with an average temperature around 27.4°C and an average high around 29.7°C. For summer trips, check rainfall and heat precautions together.
When is the rainy season in Jeju?
Rain is most concentrated in Jeju during July, August, September. The rainiest month is September, with average precipitation around 340 mm and about 23.1 rainy days.
What is the coldest month in Jeju?
The coldest month in Jeju historical averages is January, with an average temperature around 5.5°C and an average low around 3.1°C. Prepare warm clothing for winter travel.