Seongnam Weather in August
Seongnam in August averages 31°C (88°F) during the day and 22°C (72°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Seongnam in August
Expect around 14 days of rain based on historical data, with 265 mm (10 in) average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Seongnam in August
August in Seongnam sees highs of 31°C (88°F) and lows of 22°C (72°F) overnight. Mornings and evenings are often more comfortable than the peak afternoon hours. With lows of 22°C (72°F), the nights are warm and generally comfortable. These are average temperatures, but occasional heat spikes are possible. Stay comfortable by wearing light clothing and drinking water.
Sunshine in Seongnam in August
The area enjoys a balanced 154 hours of sunlight, ensuring it's neither too overcast nor too sunny.
Wind Speed in Seongnam in August
August sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.August in Seongnam has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
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 August
Min Temperature
22°C (72°F)
Max Temperature
31°C (88°F)
Chance of Rain
45%
Precipitation
265 mm (10 in)
Rainy days
14 days
Humidity
74% *
Windspeed
2 m/s (4 knots) *
Sunshine
154 hours *
Percentage Sunshine
36% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seongnam typically drop from around 31°C (88°F) at the start of August to approximately 28°C (82°F) by the end. Nights are warm, with lows typically ranging from 20°C (68°F) to 24°C (75°F).
Average temperatures in August
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 August
Historical weather for Seongnam in August
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 August
Our historical data for Seongnam spans 1976 to 2025, revealing these weather extremes.
- The hottest August day on record in Seongnam reached 40°C (104°F) (August 1, 2018).
- The coldest August day was on August 30, 2022, with a maximum of 20°C (68°F).
- The lowest overnight temperature recorded in August was 14°C (57°F) (August 30, 1993).
Best Places in South Korea in August
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 August →
perfect weather
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What to Wear in Seongnam in August
Warm but pleasant conditions in Seongnam in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Seongnam in August
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.
