Seongnam Weather in October
With daytime temperatures of 21°C (70°F) and nighttime lows of 9°C (48°F), October in Seongnam brings pleasant temperatures during the day. The perfect weather makes it an appealing time to visit.
Rainfall in Seongnam in October
Historically, the month has about 7 days of rain, averaging 57 mm (2.2 in) in total. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Seongnam in October
October tends to be one of the perfect months in Seongnam, with 21°C (70°F) in the afternoon and 9°C (48°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Seongnam in October
The city usually sees around 207 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Seongnam in October
October 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.If you favor pleasant temperatures and minimal rainfall, October is one of the best months to visit Seongnam.
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 October
Min Temperature
9°C (48°F)
Max Temperature
21°C (70°F)
Chance of Rain
23%
Precipitation
57 mm (2.2 in)
Rainy days
7 days
Humidity
62% *
Windspeed
2 m/s (4 knots) *
Sunshine
207 hours *
Percentage Sunshine
59% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seongnam typically drop from around 23°C (73°F) at the start of October to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 5°C (41°F) to 13°C (55°F).
Average temperatures in October
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 October
Historical weather for Seongnam in October
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 October
Based on 49 years of weather observations in Seongnam between 1976 and 2025, these are the recorded extremes.
- The hottest October day on record in Seongnam reached 30°C (86°F) (October 1, 1978).
- The lowest daytime temperature in October was 6°C (43°F), recorded on October 23, 1981.
- Nighttime temperatures dropped to -4°C (25°F) on October 25, 1982, marking the coldest October night on record.
Best Places in South Korea in October
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 October →
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What to Wear in Seongnam in October
For Seongnam in October, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Seongnam in October
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.
