Incheon in September

Inside Incheon's best window: Apr–Jun and Sep–Nov.

No other month rates higher than September for Incheon in this guide.

• IncheonHighs around 26 °C (79 °F), lows around 18 °C (64 °F), rain on about 8 daysHighs around 79 °F (26 °C), lows around 64 °F (18 °C), rain on about 8 days
• Seoul and north-west, South Korea · Seoul, Incheon, Suwon, the DMZfine

  Continental: dry winters down to −15 °C (5 °F) on cold snaps, hot humid summers. Fine dust (yellow dust and pollution) peaks Mar–Apr; the monsoon runs late Jun – Jul.Continental: dry winters down to 5 °F (−15 °C) on cold snaps, hot humid summers. Fine dust (yellow dust and pollution) peaks Mar–Apr; the monsoon runs late Jun – Jul.

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 · 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.

Weather, crowds and prices for any two months in Incheon, side by side.

Nothing unusual for the weather this month.

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