Seongnam Weather in April
Seongnam in April averages 19°C (66°F) during the day and 6°C (43°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Seongnam in April
Records from the past 30 years suggest around 8 days of rain, with 80 mm (3.1 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Seongnam in April
Daytime temperatures in Seongnam reach 19°C (66°F) in April, dropping to 6°C (43°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Seongnam in April
Expect a lot of sunshine this month, with about 208 hours of sun. These sunny conditions add to the overall experience.
Wind Speed in Seongnam in April
Average wind speeds reach 3 m/s (6 knots) in April, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seongnam's climate page.
Seongnam Temperature in April
Min Temperature
6°C (43°F)
Max Temperature
19°C (66°F)
Chance of Rain
28%
Precipitation
80 mm (3.1 in)
Rainy days
8 days
Humidity
54% *
Windspeed
3 m/s (6 knots) *
Sunshine
208 hours *
Percentage Sunshine
52% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seongnam typically rise from around 16°C (61°F) at the start of April to approximately 20°C (68°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 10°C (50°F).
Average temperatures in April
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in April
Historical weather for Seongnam in April
Browse day-by-day weather records for Seongnam spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seongnam historical weather extremes in April
According to our 50 years of weather records for Seongnam, the following extremes were recorded between 1976 and 2026.
- Seongnam recorded its highest April temperature of 31°C (88°F) on April 30, 2005.
- The coldest April day was on April 3, 1983, with a maximum of 6°C (43°F).
- The lowest overnight temperature recorded in April was -4°C (25°F) (April 1, 1991).
- The wettest day in April Seongnam was on April 22, 1987 with 52 mm (2 in) of precipitation.
Best Places in South Korea in April
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in April →
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What to Wear in Seongnam in April
Pleasant temperatures in April mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Seongnam in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seongnam's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Seongnam climate overview or explore weather in South Korea.
