Seongnam
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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 excellent 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 excellent 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.

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% *
* Data from: Seoul, South Korea (20 KM, 12 Miles).

Seongnam Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Seongnam - and find the best time to visit.

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 records 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 →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Cycling
    10/10
  • Walking
    10/10
  • Barbeque
    9/10
  • Camping
    4/10
  • Outdoor sports
    10/10

Seongnam 3-Day Forecast

More climate data for Seongnam

Popular in October

Where to go in October - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.