When to go · Seongnam
Seongnam in October
Great month. Inside Seongnam's best window: Mar–May, Sep–Nov.
Key facts
- Verdict
- Great
- Temperature
- 20°C (68°F)68°F (20°C) / 11°C (52°F)52°F (11°C)
- average high / low
- Rain days
- 7
- Crowds
- High
- South Korea overall
- Prices
- High
- South Korea overall
Verdict
Inside Seongnam's best window: Mar–May, Sep–Nov.
Is another month better than October?
No other month rates higher than October for Seongnam in this guide.
Weather in October
- SeongnamHighs around 20 °C (68 °F), lows around 11 °C (52 °F), rain on about 7 daysHighs around 68 °F (20 °C), lows around 52 °F (11 °C), rain on about 7 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Chuseok (harvest festival) big impact
Chuseok: 24–26 Sep 2026 (passed); about 14–16 Sep 2027 (check) · South Korea
Same three-day shutdown as Seollal; the largest travel peak of the year.
Crowds and prices
- Crowds · South Korea overall
- High
- Prices · South Korea overall
- High
South Korea overall: Clear skies, autumn colour in the mountains, festivals everywhere; Chuseok falls here some years.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Seongnam, side by side.
Verdict
Oct: Great
Mar: Great
Daytime high
Oct: 20 °C (68 °F)68 °F (20 °C)
Mar: 11 °C (52 °F)52 °F (11 °C)
Night low
Oct: 11 °C (52 °F)52 °F (11 °C)
Mar: 2 °C (36 °F)36 °F (2 °C)
Rain days
Oct: 7
Mar: 6 (better)
Crowds
Oct: High
Mar: Medium
Prices
Oct: High
Mar: Medium
Festivals listed
Oct: 1
Mar: 0
October: Inside Seongnam's best window: Mar–May, Sep–Nov.
March: Inside Seongnam's best window: Mar–May, Sep–Nov.
Seongnam: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings