Seoul Weather in April
South Korea · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
April in Seoul sees average temperatures ranging from a low of 6.6°C (43.9°F) to a high of 17.9°C (64.2°F), with a mean of 11.9°C (53.4°F). Compared to the annual average of 11.9°C (53.4°F), this month is in line with the yearly norm. Precipitation averages 57.7mm, making it approximately 69.0mm drier than the monthly average of 126.0mm. The city receives an average of 9.2 hours of sunshine per day during April, with relative humidity averaging 63.5%. Wind speeds reach an average maximum of 19.7 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.
April vs Adjacent Months
| Metric | March | April | May |
|---|---|---|---|
| Mean Temp | 5.8°C (42.4°F) | 11.9°C (53.4°F) | 16.5°C (61.7°F) |
| Rainfall | 52.5mm | 57.7mm | 128.4mm |
| Sunshine | 8.8 hrs | 9.2 hrs | 9.5 hrs |
| Humidity | 66.4% | 63.5% | 70.6% |
| Wind | 18.1 km/h | 19.7 km/h | 18.6 km/h |
| Rainy Days | 9.2 | 9.2 | 12.2 |
| Snowfall | 2.8 cm | 0.0 cm | 0.0 cm |
Seasonal Context
April falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Seoul in April, 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 April?
The average temperature in Seoul during April ranges from 6.6°C (43.9°F) to 17.9°C (64.2°F), with a mean of 11.9°C (53.4°F).
How much does it rain in Seoul in April?
Seoul receives an average of 57.7mm of precipitation in April, spread across approximately 9.2 rainy days.
What should I pack for Seoul in April?
Based on April weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is April a good time to visit Seoul?
April 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 April 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.