Seoul Weather in August
South Korea · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Seoul sees average temperatures ranging from a low of 22.5°C (72.5°F) to a high of 28.9°C (84.0°F), with a mean of 25.4°C (77.7°F). Compared to the annual average of 11.9°C (53.4°F), this month is 13.5°C warmer than the yearly norm. This is the hottest month of the year, reaching 28.9°C (84.0°F) on average. Precipitation averages 357.9mm, making it approximately 232.0mm wetter than the monthly average of 126.0mm. This is the wettest month of the year, with 357.9mm of precipitation and around 23.8 rainy days. The city receives an average of 8.5 hours of sunshine per day during August, with relative humidity averaging 84.1%. Wind speeds reach an average maximum of 15.5 km/h. For travelers, this month offers a hottest month of the year experience in Seoul, with wetter-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.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 25.0°C (77.0°F) | 25.4°C (77.7°F) | 21.3°C (70.3°F) |
| Rainfall | 324.3mm | 357.9mm | 198.6mm |
| Sunshine | 8.1 hrs | 8.5 hrs | 8.5 hrs |
| Humidity | 83.6% | 84.1% | 79.2% |
| Wind | 16.4 km/h | 15.5 km/h | 15.1 km/h |
| Rainy Days | 24.2 | 23.8 | 14.6 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Seoul in August, 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 August?
The average temperature in Seoul during August ranges from 22.5°C (72.5°F) to 28.9°C (84.0°F), with a mean of 25.4°C (77.7°F).
How much does it rain in Seoul in August?
Seoul receives an average of 357.9mm of precipitation in August, spread across approximately 23.8 rainy days. This is the wettest month of the year.
What should I pack for Seoul in August?
Based on August weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 357.9mm of precipitation.
Is August a good time to visit Seoul?
August is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Seoul
Cities with Similar August 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.