When to go · Gunpo
Gunpo in September
Mixed month. Outside the best window (Apr–May (azaleas and cherry blossom), Oct–Nov (autumn leaves, hiking)). Across South Korea: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Key facts
- Verdict
- Mixed
- Temperature
- 26°C79°F / 18°C64°F
- average high / low
- Rain days
- 8
- Crowds
- Medium
- South Korea overall
- Prices
- Medium
- South Korea overall
Verdict
Outside the best window (Apr–May (azaleas and cherry blossom), Oct–Nov (autumn leaves, hiking)). Across South Korea: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Weather in September
- GunpoHighs around 26 °C, lows around 18 °C, rain on about 8 daysHighs around 79 °F, lows around 64 °F, rain on about 8 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
- Medium
- Prices · South Korea overall
- Medium
South Korea overall: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
What to pack
Nothing unusual for the weather this month.