The Seoul 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 Seoul. Searches for the best time to visit Seoul 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. Seoul average temperature by month. For queries such as Seoul weather in April, Seoul temperature in August, or Seoul historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Seoul weather patterns. Seoul, 서울특별시 sits in a temperate 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. Seoul rainfall and seasonality. For outdoor plans in Seoul, 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 Seoul with other destinations. If you are choosing between several cities, compare Seoul with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer.
Seoul Historical Weather Since 2015 | Latest Complete Month Data
Seoul historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references. The Seoul 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 Seoul. Searches for the best time to visit Seoul 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. Seoul average temperature by month. For queries such as Seoul weather in April, Seoul temperature in August, or Seoul historical rainfall, start with the monthly pattern and then compare specific years when timing matters. How to read Seoul weather patterns. Seoul, 서울특별시 sits in a temperate 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. Seoul rainfall and seasonality. For outdoor plans in Seoul, 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 Seoul with other destinations. If you are choosing between several cities, compare Seoul with nearby destinations in the same month. This avoids relying only on annual averages and makes temperature and precipitation differences clearer. Seoul historical weather from 2015 through the latest complete month: monthly temperature, rainfall, sunshine, yearly comparisons, and travel timing references.
Seoul 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: October
- Hottest month: August
- Coldest month: January
- Rainiest month: July
| Month | Avg Temp | Precip | Rainy Days | Sunshine |
|---|
| January | -3°C | 18 mm | 7 | 7.7 h |
| February | -0.6°C | 22 mm | 5.7 | 8.4 h |
| March | 5.4°C | 41 mm | 8.9 | 9.1 h |
| April | 11.8°C | 66 mm | 9.6 | 9.4 h |
| May | 17.1°C | 106 mm | 11.4 | 9.8 h |
| June | 21.9°C | 119 mm | 15.3 | 9.7 h |
| July | 25.3°C | 304 mm | 22.5 | 8.3 h |
| August | 25.7°C | 255 mm | 20.9 | 9.2 h |
| September | 21.1°C | 147 mm | 13 | 8.4 h |
| October | 13.7°C | 83 mm | 9.8 | 8.1 h |
| November | 6.3°C | 55 mm | 10.3 | 7.3 h |
| December | -1.3°C | 28 mm | 8.5 | 7.2 h |
Source: Open-Meteo Archive; generated: 2026-06-07.
Seoul historical weather travel guide
When is the best time to visit Seoul?
Based on historical monthly averages for 2015-01-01/2026-05-31, the recommended month for Seoul is October, with an average temperature around 13.7°C, average precipitation around 83 mm, and a travel comfort score of 98.
Is it hot in Seoul in summer?
The hottest month in Seoul historical averages is August, with an average temperature around 25.7°C and an average high around 29.3°C. For summer trips, check rainfall and heat precautions together.
When is the rainy season in Seoul?
Rain is most concentrated in Seoul during July, August, September. The rainiest month is July, with average precipitation around 304 mm and about 22.5 rainy days.
What is the coldest month in Seoul?
The coldest month in Seoul historical averages is January, with an average temperature around -3.0°C and an average low around -6.7°C. Prepare warm clothing for winter travel.