Seoul Weather in October
South Korea · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
October in Seoul sees average temperatures ranging from a low of 9.1°C (48.4°F) to a high of 18.5°C (65.3°F), with a mean of 13.4°C (56.1°F). Compared to the annual average of 11.9°C (53.4°F), this month is 1.5°C warmer than the yearly norm. Precipitation averages 75.0mm, making it approximately 51.0mm drier than the monthly average of 126.0mm. The city receives an average of 8.2 hours of sunshine per day during October, with relative humidity averaging 75.1%. Wind speeds reach an average maximum of 14.0 km/h. For travelers, this month offers a temperature experience in Seoul, with drier-than-average conditions compared to the rest of the year.
Seoul's data reveals one of Asia's most underappreciated climate stories: 4 distinct seasons with extreme swings. January averages -5°C; August hits 30°C with 80% humidity — a 35°C annual swing. I tracked a week there last April and the cherry blossoms aligned perfectly with 16°C and 8 sunshine hours. The numbers say avoid July's monsoon (300mm+ of rain) and August's heat. September-October is the statistical sweet spot: 18°C, 40mm rain, UV dropping to 5. December-February has its own appeal if you can handle -10°C with wind chill.
October vs Adjacent Months
| Metric | September | October | November |
|---|---|---|---|
| Mean Temp | 21.3°C (70.3°F) | 13.4°C (56.1°F) | 6.5°C (43.7°F) |
| Rainfall | 198.6mm | 75.0mm | 66.3mm |
| Sunshine | 8.5 hrs | 8.2 hrs | 7.4 hrs |
| Humidity | 79.2% | 75.1% | 72.4% |
| Wind | 15.1 km/h | 14.0 km/h | 15.2 km/h |
| Rainy Days | 14.6 | 10.4 | 9.6 |
| Snowfall | 0.0 cm | 0.0 cm | 1.8 cm |
Seasonal Context
October falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Seoul in October, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Seoul in October?
The average temperature in Seoul during October ranges from 9.1°C (48.4°F) to 18.5°C (65.3°F), with a mean of 13.4°C (56.1°F).
How much does it rain in Seoul in October?
Seoul receives an average of 75.0mm of precipitation in October, spread across approximately 10.4 rainy days.
What should I pack for Seoul in October?
Based on October weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is October a good time to visit Seoul?
October is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Seoul
Cities with Similar October Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 37.57°, 126.98°. Timezone: Asia/Seoul. Last updated: 2026-07-30.